思科CCNA新版第3学期final-期末考试答案

合集下载

cisco第三学期final_stu

1请参见图示。

网络公司设计师正在审查客户网络图。

图中所示的拓扑存在哪两项风险或问题？（选择两项。

）12防火墙路由器和ISP 之间的连接存在单一故障点。

如果用于将Cisco Call Manager 连接到网络的交换机发生故障，将导致整个IP 电话系统发生故障。

使用第 3 层交换机将数据中心服务器与IP 电话机相连会导致延时过大。

需要采用冗余方式将IP 电话机连接到交换机，以防止接入层形成故障点。

如果一台第 3 层交换机发生故障，Cisco Call Manager 将不可达。

2网络工程师正在客户现场。

解决网络中的技术问题后，工程师为支持人员提供培训课程。

以下哪项工作职能与此类网络工程师的活动最相符？4网络设计师客户经理售前工程师售后现场工程师3下列哪个值是IPv6 地址2001:DB80:0000:0000:0C41:3EFF:FE00:0000 的另一种表达方式？32001:DB8::C41:3EFF:FE:2001:DB80::C41:3EFF:FE00::2001:DB80::C41:3EFF:FE00:02001:DB80:0:0:0:C41:3EFF:FE::4请参见图示。

SW11 上已启用的所有接口的生成树角色是什么？3 备用备份指定根5某公司的帮助台员工不太熟悉VPN。

为了使帮助台能够支持远程工作人员进行安全的远程访问，网络设计师必须将以下哪两项功能或技术定为培训内容？（选择两项）35QoS 工作原理VLAN 配置隧道协议IPv6 和IPv4 双协议栈加密算法帧中继配置6可在无线网络中广播什么信息来帮助用户连接网络并使用无线服务？1SSIDWEP 密钥VLAN 参数WPA 加密密钥VPN 身份验证信息7需要将一个配置文件从TFTP 服务器加载到路由器的RAM 中。

管理员在完成此任务前应该了解什么信息？2 路由器的IP 地址和TFTP 服务器所用的操作系统TFTP 服务器的IP 地址服务器上的配置文件的名称路由器的IP 地址和NVRAM 中路由器配置文件的名称TFTP 服务器的IP 地址和路由器上的配置寄存器的值8配置帧中继时，是什么标识WAN 交换机的虚电路？4LMICPEPVCDLCI9在实施安全策略时，安全检查列表中应当包括下列哪两项操作？（选择两项）45禁用所有日志。

思科期末考试答案

关闭窗口考试系统考试浏览器 - ENetwork Final Exam - CCNA Exploration: Network Fundamentals (版本下面是考试的考试试题以及与题目关联的评分规则。

思科网络技术学院的内容是受到版权保护的,禁止一切未经授权的张贴,分发或共享本考试的内容.1下列哪一个 OSI 层负责管理数据段？应用层表示层会话层传输层2请参见图示。

图中所示为客户端之间发送电子邮件的过程。

以下哪一列表正确地标识了图中各编号阶段使用的组件或协议？3第 4 层报头包含帮助数据传输的哪一类信息？服务端口号主机逻辑地址设备物理地址虚拟连接标识符4哪个 OSI 层提供面向连接的可靠数据通信服务？应用层表示层会话层传输层网络层5当 OSI 模型下层执行无连接协议时，通常使用什么来确认数据已收到并请求重传丢失的数据？IPUDP以太网无连接确认面向连接的上层协议或服务6下列哪三项是 CSMA/CD 的特征？（选择三项。

）设备会侦听介质，并且仅当无法检测到介质上存在其它信号时才会传输数据。

介质上的所有设备均可侦听所有通信。

设备根据配置的优先级来进行通信。

发生冲突后，引起冲突的设备会优先尝试传输数据。

发生冲突时，所有设备会在一段时间内停止传输数据，该段时间的长度随机决定。

CSMA/CD 使用令牌系统来避免冲突。

7在封装过程中，传输层添加什么标识符？源 IP 地址和目的 IP 地址源 MAC 地址和目的 MAC 地址源端口号和目的端口号源通道标识符和目的通道标识符8数据链路层有哪两项功能？（选择两项）分割和记录数据。

在源主机和目的主机上运行的程序之间进行数据交换。

控制数据如何传递到介质中。

生成信号以表示每个帧中的比特。

使用帧头和帧尾封装每个数据包，以便在本地介质中进行传输。

9请参见图示。

网络中的主机 A 和 B 正在传输层交换数据段。

下列关于此交换的陈述，哪两项是正确的？（选择两项）主机 A 正在使用 FTP 向主机 B 传输文件。

思科CCNA新版第3学期final-期末考试答案

思科CCNA新版第3学期final-期末考试答案1出于维护目的，已将路由器从网络中移除。

并已将新的 Cisco IOS 软件映像成功下载到服务器并复制到路由器的闪存中。

应该在进行什么操作后再将路由器放回网络中运行？备份新的映像。

将运行配置复制到 NVRAM 。

从闪存中删除之前版本的 Cisco IOS 软件。

重新启动路由器并检验新的映像是否成功启动。

答案说明最高分值correctness of response Option 422请参见图示。

管理员尝试在路由器上配置 IPv6 的 EIGRP ，但收到如图所示的错误消息。

配置 IPv6 的 EIGRP 之前，管理员必须发出什么命令？no shutdowneigrp router-id 100.100.100.100ipv6 unicast-routingipv6 eigrp 100ipv6 cef答案说明最高分值correctness of response Option 323IPv6 EIGRP 路由器使用哪个地址作为 hello 消息的来源？32 位路由器ID接口上配置的 IPv6 全局单播地址所有 EIGRP 路由器组播地址接口 IPv6 本地链路地址答案说明最高分值correctness of response Option 424下列关于 EIGRP 确认数据包的说法，哪两项是正确的？（请选择两项。

）发送该数据包是为了响应 hello 数据包。

该数据包用于发现接口上连接的邻居。

该数据包作为单播发送。

该数据包需要确认。

该数据包不可靠。

答案说明最高分值correctness of response Option 3 and Option 5 are correct.25何时发送 EIGRP 更新数据包？仅在必要时当获取的路由过期时每 5 秒通过组播发送每 30 秒通过广播发送答案说明最高分值correctness of response Option 126请参见图示。

思科ccna第3学期_final_第1套_V_4

What is the purpose of VLAN trunking?It improves network performance by reducing broadcast traffic.It selects the best path to transmit data in a switched network.It carries the traffic of multiple VLANs through a single link.It avoids spanning tree loops in a switched network.Refer to the exhibit. Both switches are configured with default bridge priority. Which port will act as the STP root port if all links are oper Fa0/1 interface of S1Fa0/2 interface of S1Fa0/1 interface of S2Fa0/2 interface of S2Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet conne ctions. How sh administrator change the displayed configuration to satisfy the requirement?Use SSH version 1.Reconfigure the RSA key.Configure SSH on a different line.Modify the transport input command.Refer to the exhibit. Which two facts about STP can be determined from the displayed output? (Choose two.)Switch S1 has the lowest configured STP priority in the network.Switch S1 is configured as the root bridge for VLAN1.Fa0/21 is the root port of switch S1.Fa0/22 is the redundant link.Fa0/24 is considered the best path to the root bridge.Which statement correctly describes the spanning-tree path cost?It is calculated based on the total number of switches connected in a loop.It is calculated based on the utilization of all the switches along a given path.It is calculated based on the bridge priority of the switches along a given path.It is calculated based on the sum of the port cost value, determined by link speed, for each switch port along a given path What are two requirements for configuring inter-VLAN routing using the router-on-a-stick model? (Choose two.)Each subinterface should be configured with its own IP address, subnet mask, and unique VLAN assignment.The physical interface of the router must be connected to a trunk link on the adjacent switch.The number of physical interfaces on the router should match the number of VLANs.Different static VLANs should be assigned to different interfaces of the router.The router should be configured as the VTP serverRefer to the exhibit. Which two options correctly describe the router configuration that is shown? (Choose two.)Routing between the 192.168.1.0 and 192.168.3.0 networks will not succeed until a routing protocol is configured on the route r.VLANs have not been appropriately configured on the router subinterfaces.The configuration is appropriate for a router-on-a-stick network design.Trunking has been appropriately configured on the router subinterfaces.An IP address should be applied to interface Fa0/1 for routing to occurRefer to the exhibit. What is true of the configuration of switch S1?A Cisco proprietary protocol is in use for ports Fa0/1 and Fa0/3.Switch ports Fa0/1 and Fa0/3 have been configured with the switchport mode access command.Untagged frames received on ports Fa0/1 and Fa0/3 will be placed on VLAN 1.Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both s is unable to propagate VLANs to S2. What could be the reason for this?The VTP configuration revision is different on both switches.The VTP domains are different on both switches.VTP pruning is disabled.VTP v2 is disabled.Refer to the exhibit. Router R1 is properly configured for router on a stick inter-VLAN routing, but PC1 is unable to ping PC2. What needs problem?Rename VLAN1.Connect one more port of S1 to R1.Configure the Fa0/1 port of S1 as a trunk port.Move the Fa0/0 interface of R1 to another VLAN.Refer to the exhibit. Router R-West and switch S-West1 are connected via a single ethernet cable between the router interface fa0/0 an fa0/1. The router and switch have been configured with the commands that are displayed in the exhib it. The network administrator ente trunk command and receives the output as shown. What is the cause of the "not-trunking" status for switch port Fa0/1?The trunk is established, but no VLANs have been configured to use it.The router is missing the dynamic trunking protocol statements necessary to form a trunk.Because the router does not support Dynamic Trunking Protocol, the trunk has not been established.The router, the switch, or both must be configured with the dynamic desirable option for Dynamic Trunking Protocol to establish aRefer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. W receive this message?only computer 4computer 3 and RTR-Acomputer 4 and RTR-Acomputer 1, computer 2, computer 4, and RTR-Acomputer 1, computer 2, computer 3, computer 4, and RTR-Aall of the computers and the routerRefer to the exhibit. A network administrator enters the displayed commands to configure VLAN 30. What is the result of running these commVLAN 30 will be added to S1, S2, and S3, but not to S4.VLAN 30 will be pruned from the VLAN database of S3.VLAN 30 will be added to the VLAN database of S3 but will not be propagated to S4, S2 or S1.VLAN 30 will not be added to the VLAN database of S3 and an error message will be displayedRefer to the exhibit. VTP pruning is enabled in the VTP domain that is shown. How will switch ST-1 handle Layer 2 broadcast traf host A on switch ST-C?It will be dropped.It will be forwarded out port Fa0/5 only.It will be forwarded out ports Fa0/5 and Fa0/10.It will be forwarded out ports Fa0/5, Fa0/10, and Fa0/15Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts A and D other. What is the most likely cause of this problem?The link between the switches is up but not trunked.The Fa0/11 interface of Switch1 is not configured as a trunk.Hosts A and D are configured with IP addresses from different subnets.VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.After unpacking a new Linksys WRT300N wireless multifunction device, a user needs to change the default administrator passwor d and make other configuration changes. What must the user do to access the device in order to make these changes?Use a wireless client to associate with the WRT300N and then open a HyperTerminal session with the device.Establish a wired connection with the device and then reboot the attached computer to launch the configuration software.Establish a wired connection from a computer in the same IP subnet as the WRT300N and enter the default IP address of the device into a web browser on the computer.Modify the TCP/IP properties of the computer that is connected to the WRT300N so that the computer and the WRT300N exist on the same network. Then reboot the computer to establish a connection.Refer to the exhibit. How is port Gi1/1 on SWT-A functioning in the spanning-tree topology?It is sending and receiving data frames.It is receiving BPDUs, but not sending data frames.It is participating in the election process by forwarding the BPDUs it receives.It is receiving BPDUs and populating the MAC address table, but not sending data.Refer to the exhibit. The switches have been configured as shown. The hosts that are connected to switch 101-2FL are not able to communicate with the hosts in their corresponding VLANs that are connected to switch 101-3FL. What should be done to fix the problem?Configure port Fa0/2 on switch 101-3FL as a static trunk link.Introduce a Layer 3 device or a switch with Layer 3 capability into the topology.Utilize the switchport trunk allowed vlan all command on switch 101-3FL to permit the VLAN traffic.Apply IP addresses that are in the same subnet to the interfaces that are used to connect switches 101-2FL and 101-3FLAfter listening for the presence of a signal on the network media, hosts A and C transmit data at the same time. In what two ways do the hosts respond to this situation? (Choose two.)The hosts transmit a jam signal to ensure that all hosts on the network are aware that a collision has occured.Because they are operating in full-duplex mode, the hosts resume listening for traffic in preparation for sending future messages.Because the hub will temporarily block traffic from one of the hosts, that host will be allowed to transmit once the wire is clear.Hosts A and C are assigned shorter backoff values to provide them priority to access the media for retransmission.After the backoff period of a host, the host checks to determine if the line is idle before retransmittingRefer to the exhibit. Hosts PC_A and PC_B send traffic simultaneously, and the frames from the transmitting stations collide.What is the last device to receive the collision?hub HB1switch SW1router R1switch SW2router R2switch SW4Refer to the exhibit. Switch SW2 has been newly purchased and added to the network. What configuration should be applied to SW2 so thatit participates in the same VTP domain as switch SW1, receives VLAN information from SW1, and synchronizes VLAN information?Disable VTP pruning on SW2.Configure SW2 in VTP transparent mode.Configure SW2 with the VTP domain password.Configure SW2 as a VTP server with a higher revision numberWhen configuring a router to act as an SSH server, what should be configured before issuing the crypto key generate rsacommand?the security domain namethe VTP domain namethe IP domain namethe host nameRefer to the exhibit. The switch VTY lines have been properly configured, but PC1 is unable to remotely manage the switch. How can this problem be resolved?Configure the Fa0/1 interface of the switch in trunk mode.Configure a default gateway on the switch.Configure the native VLAN on the switch.Configure the Fa0/1 interface of the switch to allow all VLANsRefer to the exhibit. A network administrator has segmented the network into two VLANs. The connected hosts can only access r esources in their own VLAN. What is the most scalable and cost effective solution to allow inter-VLAN communication in this network?Replace S1 with a router that has one FastEthernet interface for each PC.Add a second switch and divide the PCs so that each VLAN is connected to its own switch.Configure a router with two subinterfaces on one of its FastEthernet ports and connect it to S1 using a trunk link.Connect a router to a port on S1 and assign the IP address of VLAN1 to the connecting router interfaceRefer to the exhibit. An administrator documented the output of a CAM table from an Ethernet switch as shown. What action will the switch take when it receives the frame shown at the bottom of the exhibit?discard the frameforward the frame out port 2forward the frame out port 3forward the frame out all portsforward the frame out all ports except port 3add station 00-00-3D-1F-11-05 to port 2 in the forwarding tableWhich statement regarding the service password-encryption command is true?The service password-encryption command is entered at the privileged EXEC mode prompt.The service password-encryption command encrypts only passwords for the console and VTY ports.The service password-encryption command encrypts all previously unencrypted passwords in the running configuration.To see the passwords encrypted by the service password-encryption command, enter the no servicepassword-encryption commandWhich statement correctly describes the function of a Layer 2 switch?It performs switching and filtering based on the destination network layer address.It automatically uses STP to prevent switching loops in redundant topologies.It uses VTP to allow data from multiple VLANs to travel across a single link.It routes packets between different LAN segmentsWhich three statements are correct concerning the default configuration of a new switch? (Choose three.)It is configured in VTP server mode.STP is automatically enabled.The first VTY line is automatically configured to allow remote connections.VLAN1 is configured with a management IP address.All switch ports are assigned to VLAN1.The enable password is configured as ciscoRefer to the exhibit. How will switch S2 manage traffic coming from host PC1?S2 will drop the traffic, unless it is management traffic.S2 will tag the frame with VLAN ID 99 when it forwards it over the trunk link.S2 will leave the traffic untagged when it forwards it over a trunk link.S2 will tag the traffic with the highest VLAN ID value when it forwards it over the trunk link.Refer to the exhibit. The network administrator needs to remove the east-hosts VLAN and use the switch port from that VLAN in one of the existing VLANs. Which two sets of commands should be used when completely removing VLAN 2 from S1-Central while leaving the switch and all its interfaces operational? (Choose two.)S1-Central>enableS1-Central# reloadS1-Central>enableS1-Central# erase flash:S1-Central>enableS1-Central# delete flash:vlan.datS1-Central>enableS1-Central# configure terminalS1-Central(config)# no vlan 2S1-Central>enableS1-Central# configure terminalS1-Central(config-if)# interface fastethernet 0/1 S1-Central(config-if)# switchport access vlan 3Refer to the exhibit. The network administrator configures both switches as displayed. However, host C is unable to ping host D and host E is unable to ping host F. What action should the administrator take to enable this communication?Include a router in the topology.Associate hosts A and B with VLAN 10 instead of VLAN 1.Remove the native VLAN from the trunk.Configure one trunk port in the dynamic desirable mode.Add the switchport nonegotiate command to the configuration of S2Which two statements are correct about wireless infrastructure components? (Choose two.)An AP converts the TCP/IP data packets from their 802.11 frame encapsulation format to the 802.3 Ethernetframe format on the wired Ethernet network.A wireless AP does not require any physical connection to allow wireless clients to access the Internet.An AP is a layer 2 device, similar to a switch, that provides dedicated bandwidth to each connected wireless host.Collisions do not occur between wireless NICs and APs.The wireless router performs the roles of AP and router.Refer to the exhibit. The switches are configured for VTP as shown. Which two statements correctly describe the operation of these switches? (Choose two.)A new VLAN can be added to Switch1 and that information will be added only to Switch2.A new VLAN can be added to Switch1 and that information will be added to Switch2 and Switch4.An existing VLAN can be deleted from Switch4 and that VLAN will be deleted from Switch1 and Switch2.An existing VLAN can be deleted from Switch2 and that VLAN will be deleted from Switch1 and Switch4.A new VLAN can be added to Switch4 and that information will be added to Switch1, Switch2, and Switch3.A new VLAN can be added to Switch3 and that information will be added to Switch1, Switch2, and Switch4A new switch is to be added to an exis ting network in a remote office. The network administrator does not wantthe technicians in the remote office to be able to add new VLANs to the switch, but the switch should receive VLAN updates from the VTP domain. Which two steps must be performed to configure VTP on the new switch to meet these conditions? (Choose two.)Configure an IP address on the new switch.Configure the existing VTP domain name on the new switch.Configure all ports of both switches to access mode.Configure the new switch as a VTP client.Enable VTP pruningWhich two statements describe Spanning Tree Protocol? (Choose two.)It is only used at Layer 2.It is configured on routers.It eliminates Layer 2 loops in network topologies.It limits the number of valid MAC addresses allowed on a port.It allows VLAN information to propagate to other switches in the network.Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?Cat-ACat-BCat-CCat-DRefer to the exhibit. What three statements describe why Host1 and Host2 are unable to communicate? (Choose three.)The switch ports are on different VLANs.The switch IP address is on the wrong subnet.The hosts are configured on different logical networks.A router is required to forward traffic between Host1 and Host2.The VLAN port assignments must be contiguous for each VLAN.The host default gateway addresses must be on the same logical network.Refer to the exhibit. A new host needs to be connected to VLAN 3. Which IP address should be assigned to this new host?192.168.1.22 /28192.168.1.31 /28192.168.1.32 /28192.168.1.52 /28192.168.1.63 /28Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161. What will the router do with this packet?The router will drop the packet.The router will forward the packet out interface FastEthernet 0/1.1.The router will forward the packet out interface FastEthernet 0/1.2.The router will forward the packet out interface FastEthernet 0/1.3.The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3Refer to the exhibit. On which of the devices in this network should routing between VLANs take place?the core layer devicesthe access layer devicesthe distribution layer devicesthe core and distribution layer devicesRefer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student has decided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?The Fa0/7 port of STW will be shutdown.The student will gain full access to the Internet.Both the teacher and student will be able to receive data but only the teacher will be able to send.The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network.Refer to the exhibit. In what two ways will the router handle VLAN traffic that is received on the trunk? (Choose two.)Traffic to VLAN 1 received by the router interface Fa0/0 will be dropped by the router.Because interface Fa0/0 requires an IP address, the router will not be able to route between the VLANs.Packets that are received from network 192.168.20.0 /24 will be handled by subinterface Fa0/0.20.The router will use subinterface MAC addresses to identify the VLAN traffic that is received on the physical interface.The router will continue to process traffic from the attached VLANs even if the physical interface goes downRefer to the exhibit. Switch SW-A is to be used as a temporary replacement for another switch in the VTP Studentdomain. What two pieces of information are indicated from the exhibited output? (Choose two.)The other switches in the domain can be running either VTP version 1 or 2.There is a risk that the switch may cause incorrect VLAN information to be sent through the domain.VTP will block frame forwarding on at least one redundant trunk port that is configured on this switch.VLAN configuration changes made on this switch will be sent to other devices in the VTP domain.This switch will update its VLAN configuration when VLAN changes are made on a VTP server in the same domainWhat are three benefits of employing a hierarchical network design? (Choose three.)Hierarchically designed networks can more easily be expanded to suit future needs.Hierarchical design models enhance existing bandwidth through the use of link aggregation.The hierarchical model allows for specialized functionality at each layer, simplifying devicemanagement.Use of a hierarchical design allows replacement of redundant devices with high-capacity network equipment.A hierarchical design uses firewalls instead of complicated port-based and distribution layer securitypolicies.The hierarchical model allows the use of high-performance switches at all design layers, thus allowing for a fully-meshed topologyRefer to the exhibit. Hosts A and B attempt to transmit a frame at the same time and a collision occurs. When will host D be able to transmit?immediatelyafter sending its jam signalafter host A and host B have completed transmissionafter the jam signal clears and its backoff delay expiresWhat provides an authentication mechanism for 802.11-based wireless networks?DSSSOFDMSSIDWPARefer to the exhibit. What is the effect of setting the security mode to WEP on the Linksys integrated router?WEP identifies the wireless LAN.WEP allows the access point to inform clients of its presence.WEP translates IP addresses into easy-to-remember domain names.WEP encrypts data between the wireless client and the access point.WEP ensures that only authenticated users are allowed access to the WLAN.WEP translates an internal address or group of addresses into an outside, public address.Refer to the exhibit. SW-T has been configured with a single trunking interface. Which VLANs will be allowed across the trunk?Only VLAN 1 will be allowed across the trunk.All configured VLANs will be allowed across the trunk.Only the native VLAN will be allowed across the trunk.Only the the management and native VLANs will be allowed across the trunk.Only VLANs that are configured on the VTP server in the dom ain will be allowed across the trunkRefer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?This entry can only be removed from the MAC address table by a network administrator.When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18.The switch learned this MAC address from the source address in a frame received on Fa0/18.Refer to the exhibit. What is the purpose of the configuration commands that are shown?to activate port Fa0/10to make the port a member of VLAN 30to activate port security on port Fa0/10to add VLAN 30 to the trunk that is connected to port Fa0/10。

CCNA第三学期期末答案

假设没有使用 VLSM，添加 ip route 172.16.64.0 255.255.240.0 serial0/0 命令会对网络中正在工作的路由器造成什么影响？3目的地址处于 172.16.64.1 到 172.16.80.254 之间的所有数据包都会通过serial0/0 转发出去。

目的地址处于 172.16.64.1 到 172.16.255.254 之间的所有数据包都会通过serial0/0 转发出去。

目的地址处于 172.16.64.1 到 172.16.79.254 之间的所有数据包都会通过serial0/0 转发出去。

目的地址处于 172.16.0.1 到 172.16.64.254 之间的所有数据包都会通过serial0/0 转发出去。

2请参见图示。

管理员正在向网络中添加新路由器。

IP 地址 192.168.13.6/30 已被分配给 R2 上的相连串行接口。

管理员必须为新路由器的串行接口分配什么IP 地址？2192.168.13.4/30192.168.13.5/30192.168.13.7/30192.168.13.58/30192.168.13.61/27192.168.13.63/273OSPF 路由协议身份验证使用 MD5 验证时，下列有关密钥的说法中哪两项正确？（选择两项。

）24密钥以明文形式在路由器之间传递。

密钥用于帮助生成验证用的加密数字。

密钥以加密形式在路由器之间传递。

密钥永远不会在网络上传输。

数据包嗅探器可以捕获密钥。

4请参见图示。

路由表中将显示哪些路由？1R 10.10.4.0/24 [120/1] via 10.10.10.1, 00:00:12, FastEthernet0/1R 10.10.4.0/24 [120/1] via 10.10.20.1, 00:00:12, FastEthernet0/0R 10.10.4.0/24 [120/2] via 10.10.20.1, 00:00:12, FastEthernet0/0R 10.10.4.0/24 [120/3] via 10.10.30.1, 00:00:12, FastEthernet1/0R 10.10.4.0/24 [120/1] via 10.10.30.1, 00:00:12, FastEthernet1/05请参见图示。

思科第三学期期末考试答案

请参见图示。

所有中继链路工作正常，而且允许所有VLAN使用所有中继链路。

计算机5 ARP请求。

哪台或哪些设备会收到此消息？仅计算机4* 计算机3和RTR-A计算机4和RTR-A计算机1、计算机2、计算机4和RTR-A计算机1、计算机2、计算机3、计算机4和RTR-A所有计算机和路由器F列关于在接入点上启用开放式身份验证的陈述，哪一项是正确的? *不需要身份验证使用64位加密算法需要使用身份验证服务器需要共同商定的密码VL^N Flane Status Ports1ctefauft active FaOl Fa0/2 FaO/3. Fa0/4 10accounting FaO/5. FaCVG Fa0.7 Fa0/820marking actr/e FaO/5, FaO'10, Fa(V11FaO/12. FaO/U FaO/14 research Faons, FaO/16 FaOH7FaO/16. FaO/19. Fa0/201QQ management adve FaO/21, FaQ/22. FaO'23Fa0/24, GiOJ1, G iO/21002W-default act/unsup1003loken-ring-1 efault act/unsup1004■fddinet-ctefaijlt act/unsup1005act/unsup请参见图示。

该交换机用于让图中所示部门的成员实现连接，但不存在路由。

连接到应该能够与accounting VLAN 中的用户通信。

下列哪项更改可实现所需通信？将该用户连接到GiO/1。

*将该用户连接到FaO/6。

将该用户添加到本征VLAN将该用户添加到默认VLAN分层网络模型具有哪三项优点？（选择三项。

）Opti on 1,36带宽争用现象减少」物理布局范围减小网络的容错能力提高无需配线间」无需第三层功能管理和故障排除工作简化FaO/22 IF列关于新交换机默认配置的说法中哪三项正确？（选择三项。

ccna第3本期末

c c n a第3本期末work Information Technology Company.2020YEAR1请参见图示。

需要将一台新主机连接到 VLAN 3。

应该为此新主机分配什么 IP 地址？192.168.1.22 /28192.168.1.31 /28192.168.1.32 /28192.168.1.52 /28192.168.1.63 /282请参见图示。

将 Linksys 集成路由器上的安全模式设置为 WEP 有什么作用？WEP 可标识无线 LAN。

WEP 允许该接入点通知客户端它的存在。

WEP 将 IP 地址转换为容易记忆的域名。

WEP 可加密无线客户端与接入点之间的数据。

WEP 可确保只有授权用户可以访问该 WLAN。

WEP 将一个或一组内部地址转换为外部公有地址。

3请参见图示。

交换机的配置如图所示。

连接到交换机 101-2FL 的主机无法与连接到交换机 101-3FL 且位于对应 VLAN 中的主样才能纠正此问题？将交换机 101-3FL 的 Fa0/2 端口配置为静态中继链路。

在拓扑中加入第 3 层设备或具备第 3 层功能的交换机。

在交换机 101-3FL 上使用switchport trunk allowed vlan all命令允许 VLAN 流量。

4下列哪两种说法正确地描述了生成树协议（选择两项。

）它只在第 2 层使用。

它在交换机上配置。

它消除了网络拓扑中的第 2 层环路。

它限制了端口上所允许的有效 MAC 地址的数量。

5请参见图示。

教师主机连接到交换机 STW 的 Fa0/7 端口。

一位学生想要共享 Internet 访问，于是决定将集线器和笔记本电脑示连接到 STW。

学生如此连接的结果是什么？STW 的 Fa0/7 端口会关闭。

学生会获得访问 Internet 的安全权限。

教师和学生都能接收数据，但只有教师才能发送数据。

从笔记本电脑发出的帧将被丢弃，但教师主机仍与网络保持连通。

ccna_第三学期期末考试

1.VLAN 中继有何用途？通过减少广播流量提高网络性能。

选择在交换网络中传输数据的最佳路径。

通过一条链路传送多个VLAN 的流量。

避免交换网络中出现生成树环路。

请参见图示。

两台交换机都配置有默认的网桥优先级。

如果所有链路都在相同的带宽下运行，哪个端口将作为STP 根端口？S1 的Fa0/1 接口S1 的Fa0/2 接口S2 的Fa0/1 接口S2 的Fa0/2 接口请参见图示。

从图中显示的输出可以得到有关STP 的哪两项结论？（选择两项。

）交换机S1 所配置的STP 优先级值在该网络中最低。

交换机S1 被配置为VLAN1 的根桥。

Fa0/21 是交换机S1 的根端口。

Fa0/22 是冗余链路。

Fa0/24 被视为通往根桥的最佳路径。

下列哪种说法正确描述了生成树路径开销？根据环路中连接的交换机总数计算。

根据给定路径上所有交换机的使用率计算。

根据给定路径上交换机的网桥优先级计算。

根据给定路径上每个交换机端口的端口开销值（由端口速度决定）的总和计算。

使用单臂路由器模型配置VLAN 间路由有哪两项要求？（选择两项。

）每个子接口都应配置有自己的IP 地址、子网掩码和唯一的VLAN 分配。

路由器的物理接口必须连接到相邻交换机上的中继链路。

路由器的物理接口数量应该与VLAN 数量匹配。

应该将不同的静态VLAN 分配给路由器的不同接口。

路由器应该配置为VTP 服务器。

请参见图示。

下列哪两项正确描述了图中所示的路由器配置。

（选择两项。

）在路由器上配置路由协议之前，网络192.168.1.0 与网络192.168.3.0 之间无法成功路由。

路由器子接口上未正确配置VLAN。

该配置适用于单臂路由器网络设计。

路由器子接口上未正确配置中继。

应该为接口Fa0/1 分配IP 地址，否则无法进行路由请参见图示。

下列有关交换机S1 配置的说法中哪项正确？端口Fa0/1 和Fa0/3 使用的是Cisco 专有协议。

已使用switchport mode access命令配置交换机的Fa0/1 和Fa0/3 端口。

思科网院[Cisco]第三学期Final题目及答案

1请参见图示。

网络支持技术人员需要为新路由器的一个FastEthernet 接口设置IP 地址。

但接口拒绝该地址，其原因是什么该IP 地址已在使用中。

技术人员使用的是网络地址。

技术人员为/26 使用了错误的子网掩码。

技术人员必须在该接口上启用VLSM。

2一个销售代表准备从酒店使用Internet 向公司总部发送敏感信息。

旅行前，IT 工作人员进行了必要工作以允许其安全访问该销售代表实施了什么解决方VPN帧中继带有CHAP 身份验证的PPP带有PAP 身份验证的PPP3下列哪两种说法正确描述了IEEE STP 的功能？（选择两项。

）它会立即将不处于丢弃状态的所有端口转换为转发状态。

它提供了一种在交换网络中禁用冗余链路的机制。

它有三种端口状态：丢弃、学习和转发。

它可确保交换网络中没有环路。

它可在不到 1 秒的时间内使交换网络收敛。

4请参见图示。

网络管理员必须为ISP 手动总结POP 路由器上的所有IP 地址。

下列哪项是正确的总结地址？192.168.0.0/2192.168.0.0/23192.168.0.0/24192.168.0.0/255请参见图示。

所有路由器都配置为使用带有默认设置的OSPF 协议。

如果同时启动所有路由器，哪台路由器将被选为BDRR1R2R3R46有关单区域OSPF 网络的说法中，哪两项正确？（选择两项。

）DR 和BDR 会减少在广播网络中发送的更新数量。

BDR 负责将更改发布到所有其它的OSPF 路由器。

路由器使用hello 数据包建立和维护邻居邻接关系。

所有OSPF 路由器都会接收组播地址224.0.0.6 上的更新。

区域 1 必须始终存在。

7请参见图示。

网络管理员按图示配置R1。

但是，网络 A 的一些主机无法访问Internet。

下列哪两个措施可解决此问题？（在正确的接口上配置ip nat inside和ip nat outside命令。

在NAT 地址池中增加IP 地址数量。

CCNA_第三学期__期末完整版考试

1CCNA 第三学期期末While monitoring LAN traffic, a network technician notices an excessive number of broadcasts. Which two steps could be included in the processes that are needed to reduce the number of broadcasts onthe network? (Choose two.)Replace any existing hubs with switches.Add a Layer 3 device to route between networks.Subnet the existing IP network to create two networks.Increase the backbone speed by three times the current speed.Add additional switches and spread out the number of hosts evenly between them.2What advantage does cut-through switching provide?It enables QoSIt forwards frames quickly.It provides an analysis of frames.It allows reduction of traffic by using error checking to drop corrupt frames.3Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?Cat-ACat-BCat-CCat-D4W hich stackable switch feature allows for interconnection of multiple switches and will provide a cost effective solution for networks that require high bandwidth and high availability?modular line cardsspecial backplane portdedicated gigabyte line portsaggregated FastEthernet ports5Refer to the exhibit. This switch is to be added to the production network. Which two facts about VLANs and VTP operation can be confirmed by this output? (Choose two.)The network administrator will be able to configure VLANs of local significance on this switch.VLANs can only be added to the VLAN database on this switch by a VTP advertisement.All VLANs that are configured on this switch will be sent to all other switches in the same VTP domain.This switch will drop all VTP advertisements that come from switches that are configured in the same VTP domain.Adding this switch to the network will cause no disruption in the VTP domain operations if the rest of the switches in the same VTP domain have a higher configuration revision number.6Refer to the exhibit. The hosts connected to switch SW1 are not able to communicate with the hosts in the same VLANs connected to switch SW2. What should be done to fix the problem?Configure VLANs with different VLAN IDs on switch SW2.Reconfigure the trunk port on switch SW2 with static trunk configuration.Introduce a Layer 3 device or a switch with Layer 3 capability in the topology.Apply IP addresses that are in the same subnet to the interfaces used to connect SW1 and SW2.7Refer to the exhibit. A new host needs to be connected to VLAN 3. Which IP address should beassigned to this new host?192.168.1.22 /28192.168.1.31 /28192.168.1.32 /28192.168.1.52 /28192.168.1.63 /288Refer to the exhibit. SW-T has been configured with a single trunking interface. Which VLANs will be allowed across the trunk?Only VLAN 1 will be allowed across the trunk.All configured VLANs will be allowed across the trunk.Only the native VLAN will be allowed across the trunk.Only the the management and native VLANs will be allowed across the trunk.Only VLANs that are configured on the VTP server in the domain will be allowed across the trunk.9Refer to the exhibit. How will switch S2 manage traffic coming from host PC1?S2 will drop the traffic, unless it is management traffic.S2 will tag the frame with VLAN ID 99 when it forwards it over the trunk link.S2 will leave the traffic untagged when it forwards it over a trunk link.S2 will tag the traffic with the highest VLAN ID value when it forwards it over the trunk link. 10Refer to the exhibit. Both switches are interconnected via a trunk link. Host A and host B are on the default VLAN but are not able to exchange traffic. What should be done to fix the problem?Allow all VLANs on the trunk link.Remove the native VLAN from the trunk.Include a router or switch with Layer 3 capabilities.Configure the same native VLAN on both ends of the trunk.11Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?This entry can only be removed from the MAC address table by a network administrator.When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18.The switch learned this MAC address from the source address in a frame received on Fa0/18.12W hy is MAC address filtering considered a poor choice in securing a WLAN?Available bandwidth is reduced.MAC addresses are easily spoofed.APs are more susceptible to DoS attacks.The payload encryption is easily broken.13How does a switch that is configured for 802.1Q trunking handle untagged frames that are receivedon a trunk port?The frames are dropped.The frames are assigned to the native VLAN.The frames are assigned to the default VLAN.The frames are assigned to the management VLAN.14Refer to the exhibit. Which three options correctly describe the router configuration that is shown?(Choose three.)An IEEE standard trunking protocol is in use.Interface Fa0/1 has been configured with subinterfaces.The shutdown command has been applied to interface Fa0/1.Interface Fa0/1.3 is mapped to the default management VLAN.The configuration is appropriate for a router-on-a-stick network design.An IP address should be applied to interface Fa0/1 for routing to occur.15RSTP is enabled in a switched network that is active and converged. Which switch port type assumesa discarding state on non-root switches?root portedge portalternate portdesignated port16What provides an authentication mechanism for 802.11-based wireless networks?DSSSOFDMSSIDWPA17W hat is the benefit of the auto-MDIX feature on a Cisco Catalyst switch?dynamically assigns a new management VLAN IDautonegotiates IP address information for initial management connectionsallows the use of straight-through patch cables regardless of connected device typesplaces a port immediately in the forwarding state to reduce the time for the spanning tree toreconverge18Refer to the exhibit. VTP pruning is enabled in the VTP domain that is shown. How will switch ST-1 handle Layer 2 broadcast traffic originating from host A on switch ST-C?It will be dropped.It will be forwarded out port Fa0/5 only.It will be forwarded out ports Fa0/5 and Fa0/10.It will be forwarded out ports Fa0/5, Fa0/10, and Fa0/15.19Refer to the exhibit. The network administrator wants to allow both SSH and Telnet connections to Switch1. However, the SSH connections fail. What is the most likely cause of this problem?The RSA key has been removed.SSH has been configured on the wrong line.The transport input command is applied incorrectly.The domain name has been configured in the wrong configuration mode.20Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts B and D cannot ping each other. What is the most likely cause of this problem?The link between the switches is up but not trunked.The Fa0/11 interface of Switch1 is not configured as a trunk.Hosts B and D are configured with IP addresses from different subnets.VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.21Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal?only hosts A and Bonly hosts A, B, and Conly hosts A, B, C, and Donly hosts A, B, C, and E22 A network administrator implements inter-VLAN routing by configuring subinterfaces on a router.What is one important fact that must be considered?The physical interface must have an IP address configured.The subinterface numbers must match the VLAN ID number.The no shutdown command must be issued on each subinterface.The IP address of each router subinterface must be used as the default gateway for hosts on the corresponding VLAN.23W hat is the purpose of VLAN trunking?It improves network performance by reducing broadcast traffic.It selects the best path to transmit data in a switched network.It carries the traffic of multiple VLANs through a single link.It avoids spanning tree loops in a switched network.24Which parameter is used to uniquely identify one wireless network from another?SSIDOFDMWEPDSSS25W hich layers should support QoS in a hierarchical network?only the distribution and core layersonly the access and distribution layersthe access, distribution, and core layers26Refer to the exhibit. What does "FORWARDING" mean in the command output shown?The switch is sending and receiving data frames.The switch is receiving BPDUs, but not sending data frames.The switch is participating in an election process by forwarding the BPDUs it receives.The switch is receiving BPDUs and populating the MAC address table, but not sending data.27Refer to the exhibit. A network administrator is configuring RT1 for inter-VLAN routing. The switch is configured correctly and is functional. Host1, Host2, and Host3 cannot communicate with each other.Based on the router configuration, what is causing the problem?Interface Fa0/0 is missing IP address configuration information.IP addresses on the subinterfaces are incorrectly matched to the VLANs.Each subinterface of Fa0/0 needs separate no shutdown commands.Routers do not support 892.1Q encapsulation on subinterfaces.28Which switch forwarding method should be used on a network that employs frame classification based on an assigned Quality of Service (QoS) value?cut-throughfast-forwardfragment-freestore-and-forward29Refer to the exhibit. A network administrator has segmented the network into two VLANs. The connected hosts can only access resources in their own VLAN. What is the most scalable and cost effective solution to allow inter-VLAN communication in this network?Replace S1 with a router that has one FastEthernet interface for each PC.Add a second switch and divide the PCs so that each VLAN is connected to its own switch.Configure a router with two subinterfaces on one of its FastEthernet ports and connect it to S1 using a trunk link.Connect a router to a port on S1 and assign the IP address of VLAN1 to the connecting router interface.30Refer to the exhibit. A network administrator issues the show interfaces fastEthernet 0/8switchport command to check the status of the port. What can be concluded from the output?Port Fa0/8 is configured as a trunk with 802.1q encapsulation.Port Fa0/8 is configured as a trunk in VLAN 1.Port Fa0/8 is configured in access mode and associated with VLAN 1.31What will be the effect of the command S1# copy system:running-configtftp://172.16.2.155/tokyo-config?The IOS will be copied to the TFTP server.The configuration file named tokyo-config will overwrite the startup configuration file on S1.The running configuration file on S1 will be saved via TFTP to a file named tokyo-config.The contents of NVRAM on S1 will become the startup configuration file on the tokyo switch.32W hich three statements are correct concerning the default configuration of a new switch? (Choose three.)It is configured in VTP server mode.STP is automatically enabled.The first VTY line is automatically configured to allow remote connections.VLAN1 is configured with a management IP address.All switch ports are assigned to VLAN1.The enable password is configured as cisco.33Refer to the exhibit. What would happen if the network administrator moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch SW1?Host A remains a member of VLAN 10, because the router is routing traffic between VLANs.Host A is no longer a member of VLAN 10, because port Fa0/3 has been manually assigned to VLAN 30.Host A remains a member of VLAN 10, because the switch provides dynamic VLAN assignment for the port.Host A maintains connectivity to all members of VLAN 10, because it is connected to the same physical network.Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused, it is now amember of VLAN 1.34Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2.What could be the reason for this?The VTP configuration revision is different on both switches.The VTP domains are different on both switches.VTP pruning is disabled.VTP v2 is disabled.35Refer to the exhibit. Users A and B are reporting intermittent connectivity problems. Pre-installation surveys showed strong signal strength from the AP locations to the client locations. Outside electricalIncrease the distance between the clients.Change the channel on AP-B to 6 or 11.Place AP-A and AP-B on the same wireless channel.36I n which mode is a VTP switch operating if it does not allow for the creation of local VLANs but it does accept VLAN updates from other switches in the same domain?clientrootservertransparent37Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks.Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?Increase the capacity of the distribution and core trunk links to 10 Gb/s.Use Layer 3 switching on the core switch.Implement Rapid Spanning Tree Protocol.38Refer to the exhibit. Router R1 is properly configured for router on a stick inter-VLAN routing, but PC1 is unable to ping PC2. What needs to be done to resolve the problem?Rename VLAN1.Connect one more port of S1 to R1.Configure the Fa0/1 port of S1 as a trunk port.Move the Fa0/0 interface of R1 to another VLAN.39What is a result of improperly implementing a network with redundancy at Layer 2?an increase of unicast and multicast errors at Layer 3a decrease in the amount of broadcast trafficend device malfunction because of broadcast storms40W hy is it important that the network administrator consider the spanning-tree network diameter when choosing the root bridge?The network diameter limitation is 9.BPDUs may be discarded because of expiring timers.The cabling distance between the switches is 100 meters.The network diameter must be set to the number of meters of the cable between the root bridge and its farthest connected switch.41Refer to the exhibit. A network administrator needs to add IP phones to the network. To whichdevices should the IP phones connect?AS1 and AS2DS1 and DS2DS1, DS2, and CS1AS1, AS2, DS1, and DS242Which device or devices should have the Spanning Tree Protocol enabled to prevent host traffic from creating a broadcast storm?Core_S1Access_S2 and Access_S3Core_S1, Access_S2, and Access_S3Core_S1, Access_S2, Access_S3, and R143Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?The port will transition into blocking state.The port will transition immediately into forwarding state.The port will transition into blocking state and then immediately into forwarding state.The port will transition into blocking state and immediately transition through the listening and learning states.44A network administrator enables sticky learning on all access mode interfaces of a Catalyst switch, saves the configuration, then connects hosts to the switch. After the switch operates for several days, the administrator reboots the switch without saving the running configuration. What is the result?All previously learned MAC addresses are lost.The switch reverts to non-sticky dynamic learning.Connected hosts are no longer able to communicate with the switch.Previously learned sticky addresses are retained in the switch configuration.45The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Which two steps should the administrator perform to achieve this? (Choose two.)Reset the VTP counters.Configure VTP version 1 on the switch.Configure the VTP mode of the switch to transparent.Verify that the switch has a higher configuration revision number.Configure the switch with the same VTP domain name as other switches in the network.46Which statement regarding the service password-encryption command is true?The service password-encryption command is entered at the privileged EXEC mode prompt.The service password-encryption command encrypts only passwords for the console and VTY ports.The service password-encryption command encrypts all previously unencrypted passwords in the running configuration.To see the passwords encrypted by the service password-encryption command, enter the no service password-encryption command.47Refer to the exhibit. The network consists of four hubs and a switch. The hosts connected to each hub are assigned addresses in the respective VLAN as shown. PC1 on VLAN 1 becomes infected with a virus and initiates a continuous IP broadcast. Which hubs will receive the broadcasts?Hub AHubs A and BHubs A and CHubs A, B, C, and D48 A wireless LAN access point will convert traffic between which two frame encapsulation types?802.1 and 802.11802.3 and 802.11802.3 and 802.16802.5 and 802.1649I n the implementation of PVST+ in a specific VLAN where all switches have default spanning tree priorities, which spanning-tree command setting could be assigned to force one of the Catalyst switches to become and remain the root bridge?root primarypriority 8192priority 2048spanning-tree mode rapid pvst50Refer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student hasdecided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?The Fa0/7 port of STW will be shutdown.The student will gain full access to the Internet.Both the teacher and student will be able to receive data but only the teacher will be able to send.The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network.51Refer to the exhibit. Switch SW2 was tested in a lab environment and then inserted into a production network without reloading its configuration. After the trunk link between SW1 and SW2 was brought up, all users lost connectivity to the network. What could be the source of the problem?All the VLANs were pruned from the trunk port between SW1 and SW2.SW1 and SW2 cannot be both set as VTP servers in the same VTP domain.VTP configuration revision number of SW2 was higher than the configuration revision number of SW1.The additional VLANs from SW2 created more VLANs than the VLAN database of SW1 could contain.。

CCNA_3_Final_Exam_V4.0_Answers

CCNA3 Answers – CCNA Exam – CCNA Exams1. Which security protocol or measure would provide the greatest protection for a wireless LAN?WPA2cloaking SSIDsshared WEP keyMAC address filtering2.Refer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. Which device or devices will receive this message?only computer 4computer 3 and RTR-Acomputer 4 and RTR-Acomputer 1, computer 2, computer 4, and RTR-Acomputer 1, computer 2, computer 3, computer 4, and RTR-Aall of the computers and the router3.Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal?only hosts A and Bonly hosts A, B, and Conly hosts A, B, C, and Donly hosts A, B, C, and E4.Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161. What will the router do with this packet?The router will drop the packet.The router will forward the packet out interface FastEthernet 0/1.1.The router will forward the packet out interface FastEthernet 0/1.2.The router will forward the packet out interface FastEthernet 0/1.3.The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3.5.Refer to the exhibit. Which two settings show the default value of VTP configuration on a Cisco 2960 switch? (Choose two.)revision numberexisting VLANsoperating modedomain namepruning mode6. Which value determines if a switch becomes the central point of reference in the spanning tree topology?lowest bridge IDhighest revision numberlowest numeric IP addresshighest numeric MAC address7. What is the purpose of the Spanning Tree algorithm?It propagates VLAN configurations to other switches.It restricts broadcast packets to a single VLAN.It segments a network into multiple broadcast domains.It prevents loops in a switched network with redundant paths.8. What are two benefits of the IEEE 802.11n standard over the IEEE 802.11G? (Choose two.)requires less equipmentprovides improved rangepermits increased data rateshas a single-input and a single-outputneeds no hardware upgrade for compatibility9.Which configuration changes will increment the configuration revision number on the VTP server?configuring trunk links on the VTP serverconfiguring or changing the VTP passwordconfiguring or changing the VTP domain nameconfiguring or changing the VTP version numberconfiguring or deleting a VLAN or creating a VLAN name10.Refer to the exhibit. A company has acquired a new office in a campus environment. Switches in the existing office and the new office are directly connected by a trunk link. The VLANs and IP addressing are setup as shown in the exhibit. The computers in each office are not able to ping each other. What will fix the problem?Use an access link between S2 and S3.Connect S2 and S3 to a common router.Set the subnet mask in the new office to /24.Configure the new office default gateway to 172.17.10.1Change the port assignments in the new office to a different VLAN.11. What is a possible impact of setting too short an aging time in the MAC address table of a switch?overly large address tableunnecessary flooding of packetsexcessive timeouts of static addressesimpaired ability to dynamically learn new addresses12.Refer to the exhibit. The network administrator has just added VLAN 50 to Switch1 and Switch2. Hosts A, B, C, and D are correctly configured with IP addresses in the subnet range for VLAN 50. Host A can communicate with host B, but cannot communicate with host C or host D. What is the cause of this problem?There is a native VLAN mismatch.The Fa0/11 interface of Switch1 is not configured as a trunk.The link between Switch1 and Switch2 is up but not trunked.VLAN 50 is not allowed on the trunk link between Switch1 and Switch2.Refer to the exhibit. Users complain that they do not have connectivity to the web server that is connected to SW1. What should be done to remedy the problem?Allow all VLANs on the trunk link.Configure VLAN 100 as the native VLAN for SW1.Configure the trunk port in trunk mode on SW1.Attach the web server to a router and configure inter-VLAN routing.14. What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?only the management VLANall VLANs except the extended range VLANsall VLANs except 1 and 1002-1005all VLANs15.Refer to the exhibit. A new host needs to be connected to VLAN 1. Which IP address should be assigned to this new host?192.168.1.11 /28192.168.1.22 /28192.168.1.33 /28192.168.1.44 /28192.168.1.55 /2816. Using the command copy tftp:backup.cfg startup-config, an administrator downloaded a saved configuration from a TFTP server to a switch. Why does the administrator not detect any changes in the switch configuration after the download completes?The command should have been copy startup-config tftp:backup.cfg.A backup configuration from a TFTP server cannot be copied directly into the startup-config.The command copy running-config startup-config should be used to save the changes on the switch.Downloading to the startup-config requires the switch to be reloaded in order for the configuration to take effect.17. What two methods can be used to remove MAC address table entries froma switch? (Choose two.)Power cycle the switch to clear all dynamically learned addresses.The clear switching-tables command will remove statically configured entries.The clear mac-address-table command will remove statically and dynamically configured table entries.The erase flash command will clear all statically configured table entries.Statically configured MAC addresses will automatically be removed from the address table 300 minutes after the last activity on a switch port.18. Which type of traffic can still be received on a switch interface that is in STP blocking mode?BPDU framesmulticast framesbroadcast framesLayer 3 packets19. Which method establishes an administrative connection for configuring the Linksys WRT300N wireless access point?Associate with the access point and then open a HyperTerminal session with the access point.Physically connect to the access point and then reboot the computer to launch the configuration software.From a computer in the same IP subnet as the access point, enter the default IP address of the access point in a web browser.Modify the TCP/IP properties of the computer connected to the access point so that it exists on the same network, and then reboot your computer to establish a connection.20.Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?The port will transition into blocking state.The port will transition immediately into forwarding state.The port will transition into blocking state and then immediately into forwarding state.The port will transition into blocking state and immediately transition through the listening and learning states.21.Refer to the exhibit. What is true of the configuration of switch S1?A Cisco proprietary protocol is in use for ports Fa0/1 and Fa0/3.Switch ports Fa0/1 and Fa0/3 have been configured with the switchport mode access command.Untagged frames received on ports Fa0/1 and Fa0/3 will be placed on VLAN 1.Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.22.Refer to the exhibit. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. Subsequent attempts to telnet to the switch are not successful. What is causing the problem?The switch must be configured with SSH version 1.The transport input command must specify Telnet access.The RSA keys must be returned to zero before SSH will permit Telnet access.The ip domain-name command must also be entered in line configuration mode for the vty lines.23.Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?Cat-ACat-BCat-CCat-D24.Refer to the exhibit. VTP has been configured with VTP pruning enabled on all switches. If HostA sends a broadcast frame to SW1, which devices will receive the frame?SW1, SW3, HostFSW1, HostB, HostCSW1, SW2, SW3, SW4, HostFSW1, SW2, SW3, SW4, all hosts25.Refer to the exhibit. Which two statements are true about the operation of the interfaces? (Choose two.)Incoming traffic with VLAN ID 0 is processed by interface fa0/0.Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down.Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardware address.Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated.26. The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Which two steps should the administrator perform to achieve this? (Choose two.)Reset the VTP counters.Configure VTP version 1 on the switch.Configure the VTP mode of the switch to transparent.Verify that the switch has a higher configuration revision number.Configure the switch with the same VTP domain name as other switches in the network.27.Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts B and D cannot ping each other. What is the most likely cause of this problem?The link between the switches is up but not trunked.The Fa0/11 interface of Switch1 is not configured as a trunk.Hosts B and D are configured with IP addresses from different subnets. VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.28.Refer to the exhibit. Users A and B are reporting intermittent connectivity problems. Pre-installation surveys showed strong signal strength from the AP locations to the client locations. Outside electrical interference has been eliminated. What will fix the problem?Relocate the APs closer to each other.Increase the distance between the clients.Change the channel on AP-B to 6 or 11.Place AP-A and AP-B on the same wireless channel.29. Why is it advisable that a network administrator use SSH instead of Telnet when managing switches?SSH uses TCP whereas Telnet does not.SSH encrypts only the username and password when logging in.SSH encrypts all remote management communications whereas Telnet does not.SSH sends a clear text message steam which reduces the bandwidth use for management.30.Refer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student has decided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?The Fa0/7 port of STW will be shutdown.The student will gain full access to the Internet.Both the teacher and student will be able to receive data but only the teacher will be able to send.The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network.31. A network administrator configures a switch port with the command switchport mode dynamic auto. What is the resulting behavior of the switch port?The switch port is able to trunk if the remote switch port is set to auto.The switch port is able to trunk if the remote switch port is set to desirable.The switch port will be disabled if it is unable to successfully negotiate trunking.A successful trunk will be established if the remote switch is non-Cisco but the port is configured for trunking.32. Which STP port type can only appear once on a segment, and must be present in order for traffic to flow on that segment?non-root portdisabled portdesignated portnon-designated port33.Refer to the exhibit. What would happen if the network administrator moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch SW1?Host A remains a member of VLAN 10, because the router is routing traffic between VLANs.Host A is no longer a member of VLAN 10, because port Fa0/3 has been manually assigned to VLAN 30.Host A remains a member of VLAN 10, because the switch provides dynamic VLAN assignment for the port.Host A maintains connectivity to all members of VLAN 10, because it is connected to the same physical network.Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused, it is now a member of VLAN 1.34.Refer to the exhibit. VLAN 10 has been configured on the VTP server. Users who are assigned to VLAN 10 are connected as shown in the exhibit. On the basis of the outputs that are provided, which group of users will be able to communicate with the users on VLAN 10 on SW1?all the users who are connected only to SW2users on VLAN 10 who are connected only to SW3users on VLAN 10 who are connected only to SW4users on VLAN 10 who are connected to both SW3 and SW435.Refer to the exhibit. Which three options correctly identify information that could be associated with this output?(Choose three.)Interface FastEthernet3/0/0 is subinterfaced.A non-proprietary trunking protocol is in use.The configuration is appropriate for a router-on-a-stick network design.A shutdown command has been applied to interface FastEthernet3/0/0.Interface FastEthernet3/0/0.3 is mapped to the default management VLAN.An IP address should be applied to FastEthernet3/0/0 for correct data routing.36.Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks. Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?Increase the capacity of the distribution and core trunk links to 10 Gb/s.Add a trunk link that directly connects D1 and D2.Use Layer 3 switching on the core switch.Implement Rapid Spanning Tree Protocol.37.Refer to the exhibit. Each switch is configured to participate in STP for VLANs 1, 10, 20, and 30. Which switch will become the root for VLAN 20?ABCD38.Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2. What could be the reason for this?The VTP configuration revision is different on both switches.The VTP domains are different on both switches.VTP pruning is disabled.VTP v2 is disabled.39. In a three-layer hierarchical network design, which distribution layer function delineates broadcast domains?routing between VLANsaggregating traffic flowsproviding redundant linksreducing the network diameter40. Which parameter is used to uniquely identify one wireless network from another?SSIDOFDMWEPDSSS41. What is one disadvantage that 802.11a wireless has compared to 802.11g?Use of the 5GHz band requires much larger antennas.The OFDM modulation technique results in a slower data rate.There are fewer non-overlapping channels available to help reduce RF interference.The use of higher frequencies means that signals are more likely to be obstructed.42. Which three statements are correct concerning the default configuration of a new switch? (Choose three.)It is configured in VTP server mode.STP is automatically enabled.The first VTY line is automatically configured to allow remote connections.VLAN1 is configured with a management IP address.All switch ports are assigned to VLAN1.The enable password is configured as cisco.43.Refer to the exhibit. How is port Gi1/1 on SWT-A functioning in the spanning-tree topology?It is sending and receiving data frames.It is receiving BPDUs, but not sending data frames.It is participating in the election process by forwarding the BPDUs it receives.It is receiving BPDUs and populating the MAC address table, but not sending data.44. While configuring a new switch, a network administrator configures the switch as an HTTP server. What benefits does this configuration provide?This allows the switch to host web pages for the network.This allows remote VPN connections to the switch over the Internet.This is required if a web server or web farm is attached to the switch. This allows web-based configuration tools to be used with the switch.45. Which statement describes the use of voice VLANs in Cisco IP telephony? The voice VLAN carries both tagged and untagged traffic.The voice VLAN carries untagged traffic having special QoS markings.The voice VLAN must be configured on the switch port to which the IP phone attaches.Data and voice frames are tagged with same VLAN ID between the IP phone and the switch when a voice VLAN is configured.46.Refer to the exhibit. If switch SW1 is configured with the four VLANs as shown in the exhibit, how many physical interfaces are needed on router R1 to configure inter-VLAN routing using subinterfaces?zeroonetwofour47.Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?This entry can only be removed from the MAC address table by a network administrator.When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18.The switch learned this MAC address from the source address in a frame received on Fa0/18.48.Refer to the exhibit. The VTP domain has been configured as shown in the exhibit. The network technician accidentally configured the VTP server as a VTP client. After the technician reloaded the switches, all usersin the VTP domain started to complain that they lost connectivity to the users on the same VLANs that are connected to other switches. What should be done in the future to prevent losing all VLAN configurations in a VTP domain?Configure all switches in VTP transparent mode and copy the VLAN configuration into flash.Configure all switches in the network as VTP clients and copy the VLAN configuration into NVRAM.Create a new domain and configure a second switch as a VTP server to take over in case of a primary VTP server failure.In the same domain, configure a second switch as a VTP server to take over in case of a primary VTP server failure.49.Refer to the exhibit. How does SW1 manage traffic coming from Host A?SW1 drops the traffic because it is untagged.SW1 leaves the traffic untagged and forwards it over the trunk.SW1 tags the traffic with the lowest VLAN ID value and forwards it over the trunk link.SW1 encapsulates the traffic with 802.1Q encapsulation and forwards it over the trunk link.50. An administrator is troubleshooting a PC on the network which is suffering from slow and intermittent connectivity. The PC has a ping success rate to the default gateway of less than half the ping attempts. Other PCs on the switch can consistently ping the default gateway. The switch port is configured for auto duplex and the PC is configured for full duplex. What will commonly cause this problem?The PC is set to full duplex. The switch port fails to autonegotiate the duplex setting and defaults to half duplex, which causes a duplex mismatch.The switch traffic is exceeding available frame buffers. The result is that frames are being dropped.The PC and the default gateway have different bandwidth Ethernet ports.The default gateway is not on the same switch that the PC is.51.Refer to the exhibit. A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing. A test of the network, however, shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. What is the most likely cause of this problem?Switch port Fa0/1 is not trunking.Router interface Fa0/0 is possibly down.No routing protocol is configured on Router1.One of the router subinterfaces is possibly down.52.What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?automatically detects duplex settingsautomatically detects interface speedautomatically detects copper cable typeautomatically assigns the first detected MAC address to an interface。

思科第三学期期末答案(final)

1如果共享内存缓冲区和端口内存缓冲区已满，以太网交换机会如何处理流量？交换机会在NVRAM 中分配更多缓冲区。

交换机会对帧进行碎片整理，然后将其存储到NVRAM 中。

交换机会将数据包路由到目的端口。

交换机会丢弃流量。

2请参见图示。

图中的交换机被配置为使用VTP。

下列哪两种说法正确描述了这些交换机的工作情况？（选择两项。

）可向Switch1 添加新的VLAN，该信息只会被添加到Switch2。

可从Switch2 删除现有的VLAN，该VLAN 也会被从Switch1 和Switch4 删除。

可向Switch4 添加新的VLAN，该信息会被添加到Switch1、Switch2 和Switch3。

可向Switch1 添加新的VLAN，该信息会被添加到Switch2 和Switch4。

可向Switch3 添加新的VLAN，该信息会被添加到Switch1、Switch2 和Switch4。

可从Switch4 删除现有的VLAN，该VLAN 也会被从Switch1 和Switch2 删除。

3请参见图示。

网络中的所有设备均通过中继链路互连，且在所有三台交换机上启用了VTP 修剪。

交换机SW3 上的哪些修剪？VLAN 10 和VLAN 20VLAN 1、VLAN 10 和VLAN 20VLAN 1 以及VLAN 1002 至1005VLAN 1、VLAN 10、VLAN 20 以及VLAN 1002 至10054可采用哪两种方法删除交换机的MAC 地址表中的条目？（选择两项。

）关闭交换机电源并再次打开以清除所有动态获知的地址。

可采用clear switching-tables命令删除静态配置的条目。

可采用clear mac-address-table命令删除静态配置和动态配置的条目。

可采用erase flash命令删除静态配置的所有条目。

在交换机端口不活动达300 分钟后，地址表中静态配置的MAC 地址会被自动删除。

CCNA期末考试题及答案试卷A(仅供参考)

1.下列有关网络层编址的陈述中哪三项是正确的?（选择三项。

）网络层编址使用分层式结构。

使用长度为48 位的地址。

以太网交换机可以使用它来作出转发决定。

它不支持广播。

其使用的编址方法可以识别地址的网络部分。

网络层编址可以区分每台主机。

2请参见图示。

网络中的所有设备均使用默认配置。

此拓扑中存在多少个广播域？3579113请参见图示。

主机B 已断电。

交换机的MAC 表将发生什么变化？MAC 表不会受影响。

交换机会在Fa0/19 上删除MAC 地址。

交换机会保留MAC 地址，直到主机B 再次通电。

交换机将通过为端口Fa0/19 分配地址FFF.FFFF.FFFF 来重建MAC表。

4.请参见图示。

为了使此网络中的主机接入Internet，路由器RT_A 需要提供哪种功能？地址转换DHCP 服务ftpWeb 服务器5.哪三个地址属于私有IP 地址？（选择三项。

）10.0.0.1127.0.0.1150.0.0.1172.16.0.1192.168.0.1200.100.50.16请参见图示。

电缆1 和电缆2 分别按照特定的物理层要求接线。

表中按编号列出了每个网段以及该网段中用来连接网络组件的电缆。

哪三个网段安装的电缆是正确的？（选择三项。

）网段1网段2网段3网段4网段5网段67.OSI 模型的哪两项功能在第2 层实现？（选择两项）物理编址编码路由布线介质访问控制8.请参见图示。

网络管理员想通过Modem1 从PC1 远程访问路由器的CLI。

要实现此访问，应将路由器的哪一个端口连接到Modem2？控制台端口以太网端口辅助端口串行端口9请参见图示。

某学生对5e 类电缆两端的接线方法如图所示。

结果是什么？（选择两项）电缆无法使用，必须重新接线。

该电缆适合作为全反电缆使用。

该电缆适合作为快速以太网交叉电缆使用。

该电缆适合作为千兆以太网直通电缆使用。

该电缆适合在支持Auto-MDIX 的两台100 Mbps 交换机之间使用。

思科CCNA第三学期期末考试完整版

参加考试-ESwitchingFinalExam-CCNAExploration:LAN交换和无线(版本4.0)以下哪项参数用于唯一标识一个无线网络，使其与其它网络区分开来？SSIDOFDMWEPDSSS分层网络模型具有哪三项优点？（选择三项。

）带宽争用现象减少物理布局范围减小网络的容错能力提高无需配线间无需第三层功能管理和故障排除工作简化在将Catalyst交换机迁移到其它VTP管理域之前，应该进行哪三项任务？（项。

）选择正确的VTP模式和版本。

使用新管理域的名称配置交换机。

从新域中的VTP服务器上下载VTP数据库。

配置新域内的VTP服务器，使其识别该交换机的BID。

重置VTP计数器，使交换机可与新域内的其它交换机同步。

检验交换机的配置修订版号是否比新域内的其它交换机的低。

下列哪两种说法正确地描述了生成树协议？（选择两项。

）它只在第2层使用。

它在交换机上配置。

它消除了网络拓扑中的第2层环路。

它限制了端口上所允许的有效MAC地址的数量。

它使VLAN信息得以传播到网络中的其它交换机。

下列哪种方法可建立用于配置LinksysWRT300N无线接入点的管理连接？与接入点关联，然后与接入点建立超级终端会话。

以物理方式连接到接入点，然后重新启动计算机以启动配置软件。

在接入点所在的IP子网内的计算机上的web浏览器中输入接入点的默认址。

修改与接入点连接的计算机的TCP/IP属性，使其与接入点处于同一个然后重新启动计算机以建立连接。

请参见图示。

源地址并非0019.d2e4.d9f7的帧进入接口Fa0/24时会发生什么Fa0/24会变为error-disabled（错误-禁用）状态。

传入帧会被丢弃。

Fa0/24端口LED会关闭。

安全违规计数会增加。

可采用哪两种方法删除交换机的MAC地址表中的条目？（选择两项。

）关闭交换机电源并再次打开以清除所有动态获知的地址。

可采用clearswitching-tables命令删除静态配置的条目。

思科网院final考试试题

1答案正确率89。

9%下列哪三项是CSMA/CD 的特征？（选择三项。

）设备会侦听介质，并且仅当无法检测到介质上存在其它信号时才会传输数据。

介质上的所有设备均可侦听所有通信。

设备根据配置的优先级来进行通信。

发生冲突后，引起冲突的设备会优先尝试传输数据。

发生冲突时，所有设备会在一段时间内停止传输数据，该段时间的长度随机决定。

CSMA/CD 使用令牌系统来避免冲突。

2请参见图示。

从显示的会话信息中可以得出以下哪两个结论？（选择两项）所用的协议是一种面向连接的协议。

此交换是三次握手的一部分。

SYN 标志代表开始建立会话。

目的端口表示已经发起了FTP 会话。

源端口不支持与列出的目的端口通信。

3请参见图示。

下列哪组设备仅包含中间设备？A、B、D、GA、B、E、FC、D、G、IG、H、I、J4网络管理员想要限制访问路由器的特权执行模式。

管理员应该使用哪一种口令？使能aux控制台VTY5下列有关网络层编址的陈述中哪三项是正确的?（选择三项。

）使用IP 地址的最后一个二进制八位数来识别网络。

支持不同网络之间的数据通信。

由网络技术人员进行配置。

使用16 位IPv4 地址。

可阻止广播。

唯一标识每台主机。

6请参见图示。

用记号来表示每条介质链路。

用来连接不同设备的正确电缆类型是什么？连接 1 - 全反电缆，连接2 - 直通电缆，连接 3 - 交叉电缆连接 1 - 直通电缆，连接2 - 交叉电缆，连接 3 - 全反电缆连接 1 - 交叉电缆，连接2 - 全反电缆，连接 3 - 直通电缆连接 1 - 交叉电缆，连接2 - 直通电缆，连接 3 - 全反电缆连接 1 - 直通电缆，连接2 - 直通电缆，连接 3 - 直通电缆7请参见图示。

图中所示为在各层添加的头部。

哪一层会添加目的进程号和源进程号以确保将数据传递到正确的应用程序？物理层数据链路层网络层传输层8请参见图示。

技术人员正在处理网络问题，需要验证路由器的LAN 接口。

思科 ccna第三册final试题及答案

思科第三册final 试题及答案1请参见图示。

下列哪三种说法描述了 Host1 和 Host2 无法通信的原因？（选择三项。

）交换机端口处于不同的 VLAN 中。

交换机的 IP 地址在错误的子网中。

主机被配置在不同的逻辑网络中。

需要路由器在 Host1 与 Host2 之间转发流量。

每个 VLAN 中的 VLAN 端口必须连续分配。

主机的默认网关地址必须处于同一个逻辑网络中。

2请参见图示。

主机 PC_A 和主机 PC_B 同时发送流量，来自这两台发送站的帧发生了冲突。

最突信号的是哪台设备？集线器 HB1交换机 SW1路由器 R1交换机 SW2路由器 R2交换机 SW43请参见图示。

在生成树协议中，“学习”表示什么意思？交换机正在发送并接收数据帧。

交换机并未接收 BPDU，但正在发送并接收数据。

交换机正在通过转发收到的 BPDU 参与选举过程。

交换机正在接收 BPDU 并填充 MAC 地址表，但并未发送数据。

4请参见图示。

RTB 被配置为进行传统的 VLAN 间路由。

RTB 可以 ping 通计算机 A 但无法 pin 机 B。

此故障的原因可能是什么？Fa0/11 端口处于错误的 VLAN 中。

RTB 上没有有效的路由协议。

计算机 B 的 IP 地址在错误的逻辑网络中。

路由器的 Fa0/1 接口上配置了错误的中继封装类型。

5请参见图示。

网络管理员已将网络划分为两个 VLAN，R1 和 S1 的配置如图所示。

但是，PC1 无法问题很可能出在哪里？R1 上未配置路由协议。

S1 的 Fa0/1 端口不是中继端口。

S1 上未设置默认网关地址。

S1 和 R1 之间只配置了一条物理链路用于 VLAN 间路由。

6单臂路由器 VLAN 间路由有哪三项特征？（选择三项。

）需要使用 VTP需要使用子接口减少广播域的数量使用过多 VLAN 时会影响性能需要在路由器和至少一台交换机之间采用接入链路比用于 VLAN 间路由的其它方法更加经济规定至少要在路由器和交换机之间使用两个交换机端口7请参见图示。

思科CCNA新版第3学期final-期末考试答案

cisco第三学期final_stu

思科 期末考试答案

思科CCNA新版第3学期final-期末考试答案

思科ccna第3学期_final_第1套_V_4

CCNA第三学期期末答案

思科第三学期期末考试答案

ccna第3本期末

ccna_第三学期期末考试

思科网院[Cisco]第三学期Final题目及答案

CCNA_第三学期__期末完整版考试

CCNA_3_Final_Exam_V4.0_Answers

思科第三学期期末答案(final)

CCNA期末考试题及答案试卷A(仅供参考)

思科CCNA第三学期期末考试完整版

思科网院final考试试题

思科 ccna第三册final试题及答案

思科期末考试答案