思科CCNA第三学期期末考试(完整版!!!)..电子教案

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思科网院第三学期期末考试1

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1请参见图示。

连接到交换机X 上的VLAN 10 中的主机通过以下哪种方法可以与连接到交换机10 中的主机通信？QoS路由(routing)中继VPNVoIP子接口评分规则： correctnessof response此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线3.2.1 VLAN 中继2请参见图示。

所有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，哪个端口将作为交换机 A 的Fa0/1 接口交换机 A 的Fa0/2 接口交换机 B 的Fa0/1 接口交换机 B 的Fa0/2 接口交换机 C 的Fa0/1 接口交换机 C 的Fa0/2 接口评分规则： correctnessof response此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线5.2.4 端口角色3请参见图示。

网络管理员希望允许用户通过SSH 和Telnet 连接访问Switch1。

但是SSH 连接却题最可能的原因是什么？未删除RSA 密钥。

SSH 被配置在错误的线路上。

transport input命令应用不正确。

配置域名时进入的配置模式错误。

评分规则： correctness ofresponse此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线2.4.3 配置Telnet 和SSH4请参见图示。

SW1 是一台2960 交换机，已对其指定了默认值。

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第三学期第三套

模拟题三1、交换机端口 fa0/1 被手动配置为中继端口，现在拟用于将一台主机连接到网络。

网络管理员应该怎样重新配置交换机端口 Fa0/1？A. 禁用 DTP。

B. 删除当前通过端口 Fa0/1 中继的所有 VLAN。

C. 关闭该接口，然后重新启用，使其恢复默认配置D. 在接口配置模式下输入 switchport mode access 命令。

2、命令 switchport mode dynamic desirable 有什么效果？A. 由于本征 VLAN 不是默认 VLAN，DTP 将无法协商中继链路。

B. 除非相连的远程接口也配置为动态期望模式，否则该接口无法协商中继链路。

C. 相连的设备会动态确定必须通过该链路传输多个 VLAN 的数据的时机并根据需要打开中继链路。

D. 如果使用 switchport mode dynamic auto 命令或 switchport mode trunk 命令配置远程相连设备，则会形成中继链路3、网络管理员必须怎样做才能将快速以太网端口 fa0/1 从 VLAN 2 中删除并将其分配给 VLAN 3A. 在全局配置模式下输入 no vlan 2 和 vlan 3 命令B. 在接口配置模式下输入 switchport access vlan 3 命令C. 在接口配置模式下输入 switchport trunk native vlan 3 命令。

D. 在接口配置模式下输入 no shutdown 使其恢复默认配置，然后为VLAN 3 配置该端口。

4、请参见图示。

从生成图中所示的输出的交换机可得出哪两条结论？（选择两项。

）A. 网络管理员配置了 VLAN 1002-1005。

B. VLAN 处于活动状态，且正在协商配置参数。

C. 此交换机上配置了 FDDI 中继链路。

D. 在接口配置模式下为接口FastEthernet 0/1 输入了命令switchport access vlan 20。

思科CCNA考试答案(全)

CCNA思科考试答案（全）第 1 章考试1一家拥有10 名员工的小型公司使用单个LAN 在计算机之间共享信息。

哪种类型连接适合此公司？由当地电话服务提供商提供的拨号连接能够使公司方便且安全地连接员工的虚拟专用网络通过当地服务提供商建立的私有专用线路通过当地服务提供商提供的宽带服务（如DSL）答案：4解析：对于这种小型办公室，比较适合通过被称为数字用户线路(DSL) 的常见宽带服务实现Internet 连接，这种服务由当地的电话服务提供商提供。

由于员工人数很少，带宽的问题并不突出。

如果公司较大，在远程站点有分支机构，则专用线路会更加适合。

如果公司员工需要通过Internet 与公司联系，则采用虚拟专用网。

2哪种网络情况需要使用WAN？员工工作站需要获取动态分配的IP 地址。

员工在出差时需要通过VPN 连接到公司电子邮件服务器。

分支机构的员工需要与同一园区网络上的另一座建筑物内的公司总部共享文件。

员工需要访问托管在其建筑物内DMZ 中的公司Web 服务器上的网页。

答案：2解析：当出差的员工需要通过WAN 连接到公司电子邮件服务器时，VPN 将通过WAN 连接在员工笔记本电脑与公司网络之间创建一个安全隧道。

通过DHCP 获取动态IP 地址是LAN 通信的功能。

在企业园区的不同建筑物之间共享文件可通过LAN 基础设施来实现。

DMZ 是企业LAN 基础设施内一个受保护的网络。

3以下哪项描述了WAN 的特征？WAN 和LAN 在同一地理范围内运行，但有串行链路。

WAN 网络归运营商所有。

所有串行链路均被视为WAN 连接。

WAN 可提供到园区主干网的终端用户网络连接。

答案：2解析：WAN 可用于将企业LAN 互连到远程分支机构站点LAN 和远程工作人员站点。

WAN 归运营商所有。

虽然WAN 连接一般通过串行接口实现，但并不是所有串行链路均连接至WAN。

LAN（而非WAN）可在组织中提供终端用户网络连接。

4电路交换WAN 技术的两个常见类型是什么？（请选择两项。

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。

思科学院第三学期1~9章节练习和答案

17
28
39
410
524
631
11请参见图示。图中的所有网络都带有 /24 前缀。假设网络中的所有路由器均已获知所有路由，哪个地址最适合总结图中的网络？ 4
1192.168.8.0/21
2192.168.8.0/24
3192.168.16.0/20
4192.168.16.0/21
5192.168.16.0/24
1网络地址 192.168.100.0
2网络地址 192,168,100,128
3网络地址 192.168.100.130
4广播地址 192,168,100,157
5广播地址 192,168,100,159
6广播地址 192.168.100.255
3 CIDR 对网络有哪两项好处？（选择两项。） 14
13请参见图示。主机 A 被分配了 IP 地址 10.118.197.55/20。此子网还能另外支持多少台联网设备？ 5
1253
2பைடு நூலகம்09
31021
42045
54093
14当在 Cisco 路由器上配置 NAT 时，内部本地 IP 地址是什么？ 3
1内部主机显示给外部网络的 IP 地址
2外部主机显示给内部网络的 IP 地址
3该路由是可行后继路由，如果当前路由发生故障，就会使用该路由。
4该路由上没有发往该网络的通信活动。
5该路由可以用于转发流量。
11请参见图示。路由器 A 和路由器 B 上配置了 EIGRP 且禁用了自动总结。应用到路由器 A S0/0/0 接口上的哪条命令会手动总结发往路由器 B 的 EIGRP 通告中的网络？ 2
2192.168.65.32

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 - ES ｗit ｃｈi ｎg Ｆｉｎal Ex ａｍ－ CC ＮA Ex ｐlo ｒation: LAN 交换和无线 (版本 4。

0）1 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？S ＳIDOFDMWEPDSSS2 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3 在将 Cataly ｓt 交换机迁移到其它 VTP管理域之前，应该进行哪三项任务？选择正确的 V ＴＰ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。

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。

它使VLＡN 信息得以传播到网络中的其它交换机.5下列哪种方法可建立用于配置Linkｓys WRT3０0N 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IP 地址。

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网络中,然后重新机以建立连接。

6ﻫﻫ请参见图示。

源地址并非0019.d2e4．d９f７的帧进入接口Ｆa0/24 时会发生什么情况?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。

7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。

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第三学期第三套

模拟题三1、交换机端口 fa0/1 被手动配置为中继端口，现在拟用于将一台主机连接到网络。

网络管理员应该怎样重新配置交换机端口 Fa0/1？A. 禁用 DTP。

B. 删除当前通过端口 Fa0/1 中继的所有 VLAN。

C. 关闭该接口，然后重新启用，使其恢复默认配置D. 在接口配置模式下输入 switchport mode access 命令。

2、命令 switchport mode dynamic desirable 有什么效果？A. 由于本征 VLAN 不是默认 VLAN，DTP 将无法协商中继链路。

B. 除非相连的远程接口也配置为动态期望模式，否则该接口无法协商中继链路。

C. 相连的设备会动态确定必须通过该链路传输多个 VLAN 的数据的时机并根据需要打开中继链路。

D. 在接口配置模式下输入 no shutdown 使其恢复默认配置，然后为VLAN 3 配置该端口。

4、请参见图示。

从生成图中所示的输出的交换机可得出哪两条结论？（选择两项。

）A. 网络管理员配置了 VLAN 1002-1005。

B. VLAN 处于活动状态，且正在协商配置参数。

C. 此交换机上配置了 FDDI 中继链路。

D. 在接口配置模式下为接口FastEthernet 0/1 输入了命令switchport access vlan 20。

cisco第三学期模拟期末考试

∙考试结果∙试题反馈报告CCNA Exploration: LAN 交换和无线 (版本 4.0) -ESwitching Practice Final Exam下面是针对您未获得满分的题目的反馈。

有些互动题目可能不会显示您的回答。

分项分数：1请参见图示。

所有中继链路工作正常有 VLAN 使用所有中继链路。

计算机 5 发送了一条 ARP 请求。

哪台或哪些设备会收正确响应您的响应仅计算机 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此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线∙ 3.1.4 通过 VLAN 控制广播域2 下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？正确响应您的响应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此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线∙7.2.2 无线安全协议3请参见图示。

该交换所示部门的成员实现连接，但不存在路由。

连接到 Fa0/22 的一位用户应该能够与 a VLAN 中的用户通信。

下列哪项更改可实现所需通信？正确响应您的响应将该用户连接到 Gi0/1。

将该用户连接到 Fa0/6。

将该用户添加到本征 VLAN。

将该用户添加到默认 VLAN。

此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线∙ 3.3.3 管理 VLAN4 分层网络模型具有哪三项优点？（选择三项。

）正确您的此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线∙ 1.1.2 分层网络设计的原则5 下列关于新交换机默认配置的说法中哪三项正确？（选择三项。

）正确您的此试题参考以下领域的内容：CCNA Exploration: LAN 交换和无线∙ 3.3.2 配置 VLAN6请参见图示。

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 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。

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