思科网络技术学院复习题2

思科第二学期期末试题及答案

Close WindowAssessment System 1. Assessment Selection 2. Assessment Settings 3. Take Assessment 1Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2? 192.168.1.0/24 192.168.0.0/24 192.168.0.0/22 192.168.1.0/22 2If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from try to load the IOS image first? ROM RAM NVRAM f lash flash TFTP server 3Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. result of adding this command? This route is automatically propagated throughout the network. The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0. A static route is established. A static route is established. The traffic for all Class C networks is forwarded to 172.16.1.2. 4Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.) authentication link-state advertisements h old-down timers hold-down timers Spanning Tree Protocol split horizon 5Refer to the exhibit. What information can be determined from the displayed output? E IGRP packets are waiting to be sent to the neighbors. EIGRP packets are waiting to be sent to the neighbors. The adjacencies between the routers are yet to be established. The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2. Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interf6Which statement is true about the metrics used by routing protocols? A metric is a value used by a particular routing protocol to compare paths to remote networks. A metric is a value used by a particular routing protocol to compare paths to remote networks. A common metric is used by all routing protocols. The metric with the highest value is installed in the routing table. The router may use only one parameter at a time to calculate the metric. 7Which feature of RIPv2 enables it to function as a classless routing protocol? Subnet masks are included in routing updates. Routing updates are triggered by topology changes. Next-hop addresses are included in routing updates. N ext-hop addresses are included in routing updates. Multicast addresses are used to send routing updates. 8Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured? the IP address of the Fa0/0 interface at R1 t he IP address of the Fa0/0 interface at R1 the IP address of the S0/0/1 interface at R2 the IP address of the S0/0/0 interface at R1 the subnet mask of the S0/0/1 interface at R2 9Which prompt is used to allow a user to change the IP address of an interface on a router? Router> R outer> Router# Router(config)# Router(config-if)# 10Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routeestablish a neighbor adjacency. What should the network administrator do to troubleshoot this problem? Check if the interfaces of the routers are enabled. Check the hello and dead intervals between the routers. C heck the hello and dead intervals between the routers. Check the process ID of both routers. Check if CDP is enabled on all the routers. 11Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Route interface in the same network as the serial interface of Router1? IP 172.16.0.18, subnet mask 255.255.255.0 IP 172.16.32.15, subnet mask 255.255.255.240 I P 172.16.32.15, subnet mask 255.255.255.240 IP 172.16.0.18, subnet mask 255.255.255.252 IP 172.16.32.18, subnet mask 255.255.255.252 12Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load configuration settings. What could be the cause of this problem? There is insufficient NVRAM. There is insufficient flash memory. The configuration register is not configured with the default setting. The system image file is not located in NVRAM. 13Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will b routing table? 14Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration a What should be done so that host A can access server A? Add the command n ono auto-summary on all routers. Change the network statements to include a wildcard mask. Adjust the EIGRP hello timers to account for the network delay. Add the command e igrpeigrp log-neighbor-changes on all routers. 15Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is the routers in this topology will respond to this event? Router4 will learn about the failed route 30 seconds later in the next periodic update. Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expire Router5 immediately flushes the unreachable route from its routing table. Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0. 16A network administrator is in charge of two separate networks that share a single building. What device will be require networks and add a common connection to the Internet that can be shared? hub router access point Ethernet switch E thernet switch 17Refer to the exhibit. A network administrator has configured OSPF using the following command: network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF? FastEthernet0/0 FastEthernet0/1 Serial0/0/0 Serial0/0/1 18Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the netcommands is required to configure a single area OSPF for the networks that are connected to R2? R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 119Which two statements are true for link-state routing protocols? (Choose two.) Routers that run a link-state protocol can establish a complete topology of the network. Routers in a multipoint network that run a link-state protocol can exchange routing tables. Routers use only hop count for routing decisions. The shortest path first algorithm is used. Split horizon is used to avoid routing loops. 20Which candidate route has the longest match for a packet with a destination address of 10.30.16.48? 10.30.0.0/16 10.30.15.0/23 10.30.16.0/24 10.30.16.32/27 10.30.16.32/30 21Which statement is true about the RIPv1 protocol? It is a link-state routing protocol. It excludes subnet information from the routing updates. It uses the DUAL algorithm to insert backup routes into the topology table. It uses classless routing as the default method on the router. 22Which of the following are primary functions of a router? (Choose two.) packet switching microsegmentation domain name resolution path selection flow control 23Refer to the exhibit. Partial results of the show running-config and s how show ip route commands are displayed. Router B rec with a destination address of 10.16.1.97. What will router B do? drop the packet forward the packet via the route to 10.16.1.0 f orward the packet via the route to 10.16.1.64 forward the packet via the route to 10.16.1.64 use the default route 24 What are two ways that a router can learn of the paths to destination networks? (Choose two.) updates from other routers DHCP information broadcasts m anual configuration of routes manual configuration of routes ARP requests from connected routers inspection of the destination IP address in data packets updates from the SMTP management information base 25Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this? The IP address of host A is incorrect. The default gateway of host A is incorrect. The Fa0/1 interfaces of the two routers are configured for different subnets. T he Fa0/1 interfaces of the two routers are configured for different subnets. The subnet mask for the Fa0/0 interface of R1 is incorrect. 26A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured protocols appear in the output of show ip protocols. However, only EIGRP internal routes appear in the routing tables. correctly explains the scenario? The OSPF protocol has a higher cost than EIGRP. T he OSPF protocol has a higher cost than EIGRPThe EIGRP protocol has a lower metric than OSPF. The EIGRP protocol was configured first on the router. The EIGRP protocol has a lower administrative distance than OSPF. 27Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are d are operational and pings are not blocked on this network. Which ping will fail? from R1 to 172.16.1.1 from R1 to 192.168.3.1 from R2 to 192.168.1.1 from R2 to 192.168.3.1 28Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two de this? (Choose two.) a CSU/DSU device a modem a n Ethernet switch an Ethernet switch a hub a bridge 29 In which situation would a default static route be recommended? when connecting an edge router to the Internet w hen variable length subnet masking is in effect when variable length subnet masking is in effect when there is more than one valid route for a destination network when a destination network has a larger mask than any routes in the routing table 30 Two routers need to be configured within a single OSPF area. Which two components need to be configured on boththis? (Choose two.) t he same process ID the same process ID the same area ID network addresses and wildcard masks the same router ID the same loop back address 231Refer to the exhibit. What is the meaning of the highlighted value 120? It is the metric that is calculated by the routing protocol. It is the value that is used by the DUAL algorithm to determine the bandwidth for the link. It is the administrative distance of the routing protocol. It is the hold-down time, measured in seconds, before the next update. 32Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip database However, upon running the show ip route command, the network administrator sees that the router has installed a diff command, the network administrator sees that the router has installed a diffe 192.168.6.0 network learned via EIGRP. What could be the reason for the missing RIP route? Compared to RIP, EIGRP has a lower administrative distance. Compared to EIGRP , RIP has a higher metric value for the route. Compared to RIP , the EIGRP route has fewer hops. Compared to RIP , EIGRP has a faster update timer. 33 Which mechanism helps to avoid routing loops by advertising a metric of infinity? route poisoning split horizon hold-down timer triggered updates 34 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 20LANs. Which subnet mask should the administrator use to create the new subnets? 255.255.224.0 255.255.240.0 255.255.248.0 255.255.252.0 35 A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional com. What additional com issued by the technician to activate the interface to forward traffic? Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config36 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a altered to accommodate a topology change? Keep the existing static route and configure a new static route with the correct next hop IP address. Negate the existing static route and configure a new static route with the correct next hop IP address. D o nothing. The existing static route will automatically update the next hop entry with the new IP address. Do nothing. The existing static route will automatically update the next hop entry with the new IP address. Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP a37Refer to the exhibit. What needs to be done to allow these two routers to connect successfully? Add a clock rate to S0/0/0 on R1. Add an interface description to S0/0/1 on R2. C hange the serial interface on R2 to S0/0/0 so that it matches R1. Change the serial interface on R2 to S0/0/0 so that it matches R1. Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1. 38Refer to the exhibit. The network administrator has run the following command on R1. R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command? Traffic for network 192.168.2.0 is forwarded to 172.16.1.2. This route is automatically propagated throughout the entire network. Traffic for all networks is forwarded to 172.16.1.2. The command invokes a dynamic routing protocol for 192.168.2.0. 39 Why is fast convergence desirable in networks that use dynamic routing protocols? Hosts are unable to access their gateway until the network is converged. Routers will not allow packets to be forwarded until the network is converged. Routers may make incorrect forwarding decisions until the network has converged. Routers will not allow configuration changes to be made until the network has converged. 40Refer to the exhibit. When all of the commands that are shown in the exhibit are entered at the correct router promp the router? name cisco router hostname 41Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (C10.0.0.0/8 64.100.0.0/16 128.107.0.0/16 172.16.40.0/24 192.168.1.0/24 192.168.2.0/24 42Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set o. Which set o values would allow a computer that is connected to the router interface to communicate with remote networks? A: 172.16.3.254 A: 172.16.3.254 B: 255.255.192.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.192.0 C: 172.16.3.255 A: 172.16.3.254 B: 255.255.255.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.255.0 C: 172.16.3.1 43Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through three.) The router modifies the TTL field, decrementing it by one. The router changes the source IP to the IP of the exit interface. The router maintains the same source and destination IP. The router changes the source physical address to the physical address of the exit interface. The router changes the destination IP to the IP of the exit interface. The router sends the packet out all other interfaces, besides the one it entered the router on. 44Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.) The route to network 172.16.0.0 has an AD of 156160. Network 192.168.0.16 can best be reached using FastEthernet0/0. The AD of EIGRP routes has been manually changed to a value other than the default value. Router1 is running both the EIGRP and OSPF routing process. Network 172.17.0.0 can only be reached using a default route. No default route has been configured. N o default route has been configured. 45Refer to the exhibit. Which route will be installed in the routing table on R1 to forward traffic from PC1 to the web s the static route the route learned via OSPF the route learned via EIGRP both routes learned via OSPF and EIGRP 46Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this r a password? The login command was not entered on the console line. The enable password should be an enable secret password. No username and password combination has been configured. Console connections cannot be configured to require users to provide passwords. 47Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network? ADC ABC It will load balance the traffic between ADC and ABC It will send the traffic via ABC, and will use ADC as a backup path only when ABC fails. 48A router learns about network 192.168.10.128/27 from multiple sources. Which option represents the best route and w routing table? S 192.168.10.128/27 [1/0] via 192.168.10.226 R 192.168.10.128/27 [120/2] via 192.168.10.226, 00:00:14, Serial0/0/0 O 192.168.10.128/27 [110/1563] via 192.168.10.226, 00:00:09, Serial0/0/0 D 192.168.10.128/27 [90/21026560] via 192.168.10.226, 00:00:16, Serial0/0/0 49Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly cothe routing table. What is the likely cause? The adjacent interfaces are passive. The distance of 120 exceeds 15 hops. R2 will not accept version 1 updates from R1. Routes are being summarized by R1 but not by R2. 50It is saved in the topology table for use if the primary route fails. It may be backed up by a feasible successor route. It is used by EIGRP to forward traffic to the destination. It is flagged as active in the routing table. After the discovery process has occurred, the successor route is stored in the neighbor table. 51Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem? An incorrect IP address is configured between the two routers. No static route is configured on Router2. A routing loop has occurred. No routing protocol is configured on either of the two routers. 52Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that inte FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1? A clock rate should be added to the interface configuration. The subnet mask should be added to the interface configuration. An interface description needs to be added to the interface configuration. The no shutdown command needs to be added to the interface configuration. 。

(完整版)思科题库2(修改)

1: PDU封装的正确顺序是什么?锁头网络报头MA网络赧头传输歿头帧头数磚tm帧头數宠赣亀帧头IM 2:建立融合网络有何用途？O为斯有终鋸设备提供高速连揺O确保平等对待所有类盘的数霸包O实规数据网络基础架撇犒的容错能力和高可用性降低部署和维护通信基珊栈施的咸本A: ISPD JP电话和PC3:请参见图示。

哪个区域最有可能是图中所示的公司网络的外联网?I」回前A1 1区域BH BSCO区域D4：主机正在访冋远程网络的FTP服务器。

中间网络设备在此对话中起到哪三个作用？（请选择三项。

）列重新生成埶据信号0充当喜户端或服务器□提供伎输消息的画适&应用安全诠置来控制数据掠a岀现错误时si知其他设冷□用作滴恳的源或目标5 一位家庭用户想要使用能够在普通电话线路上提供快速数字传输的ISP连接。

应选择哪种ISP连接类型？厨OSL0拨号U卫星口手机调制解调器0电缆调制熾调器6:在学校网络上，学生可以浏览网页、搜索图书馆数据库，还可以和日本的姊妹学校一起参加音频会议。

如果使用QoS为网络流量排列优先顺序，这些流量的优先级从高到低如何排列？働音频会仪、敎馨障、HTTPO樋库、HTTP'S®馳O音颠会械、HTTPx埶捐庫O數辖库、音频会愤、HTTP7:管理员在发出ping命令之后在交换机上使用Ctrl-Shift-6键组合。

使用这些按键有什么用途？0重新启Ejhpingjfi程•I Ping 进程O退出到不同的配置複武u咒诈用户凫成齡令& OSI模型的物理层有什么重要功能?接覺来自物理介厲的帧。

0将上层数揺封装咸帧。

匕定义硬件核口执行的介质访问方达。

•3苗砸蹣码対电子、光纤或无绕电克信总。

9:下列哪个程序用于降低铜缆中的串扰影响?1零耍正确接地连播®统合反血］电路线对O用樂馬屏護滾住錢束0设计电86基珊设庇避免串扰干扰v.懂免在安装H出珈弯曲2层交换机10：如果收到的帧的目的MAC地址不在MAC表中，第将执行什么操作？O它会友起久阿1请求。

思科练习题2(带参考答案)

1第 3 层头部包含的哪一项信息可帮助数据传输？端口号设备物理地址目的主机逻辑地址虚拟连接标识符标题描述最高分值1 correctness of response2 points for Option 30 points for any other option2此试题参考以下领域的内容：CCNA Exploration: 网络基础知识∙ 2.5.3 数据通过网际网络2IP 依靠 OSI 哪一层的协议来确定数据包是否已丢失并请求重传？应用层表示层会话层传输层标题描述最高分值1 correctness of response2 points for Option 40 points for any other option2此试题参考以下领域的内容：CCNA Exploration: 网络基础知识∙ 5.1.4 IPv4 协议 - 尽力3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物理层数据链路层网络层传输层标题描述最高分值1 correctness of response2 points for Option 4 20 points for any other option此试题参考以下领域的内容：CCNA Exploration: 网络基础知识∙ 2.5.1 网络中的编址4下列哪一个 OSI 层使用头部信息将数据段重组为数据流？应用层网络层表示层会话层传输层标题描述最高分值1 correctness of response2 points for Option 50 points for any other option2此试题参考以下领域的内容：CCNA Exploration: 网络基础知识∙ 4.1.2 控制会话5请参见图示。

图中所示为客户端之间发送电子邮件的过程。

从下列选项中选择正确标识图中各编号阶段使用的组件或1.MUA2.MDA3.MTA4.SMTP5.MTA6.POP7.MDA8.MUA1.MUA2.POP3.MDA4.SMTP5.MTA6.MDA7.SMTP8.MUA1.MUA2.POP3.SMTP4.MDA5.MTA6.SMTP7.POP8.MUA1.MDA2.SMTP3.MTA4.SMTP5.MTA6.MUA7.POP8.MDA1.MUA2.SMTP3.MTA4.SMTP5.MTA6.MDA7.POP8.MUA标题描述最高分值1 correctness of response2 points for Option 50 points for any other option2此试题参考以下领域的内容： CCNA Exploration: 网络基础知识∙3.3.3 电子邮件服务及 SMTP/POP 协议6某主机正在网络上传输视频。

思科第二期考试试题及答案(正确率100%)

参加考试 - ERouting Final Exam - ${COURSENAME} (版本 ${VERSION}) 窗体顶端剩余时间:窗体底端1窗体顶端请参见图示。

哪台路由器会通告子网 172.16.1.32/28？Router1Router2Router3Router4窗体底端窗体顶端请参见图示。

所有路由器都运行相同的路由协议。

根据图示及其显示的命令，下列哪一项叙述正确？通配符掩码配置有误。

必须在每台路由器上配置默认路由。

路由器 B、C 和 D 无法访问 Internet。

路由协议进程未通告通往 ISP 的链路。

窗体底端3 窗体顶端请参见图示。

所有路由器都运行 RIPv1。

10.1.1.0/29 和 10.1.1.16/29 这两个网络无法互相访问。

此问题的原因可能是什么？因为 RIPv1 是无类协议，不支持该访问。

RIPv1 不支持不连续网络。

RIPv1 不支持负载均衡。

RIPv1 不支持自动总结。

窗体底端窗体顶端请参见图示。

路由器 R1 和 R2 通过其串行接口直接相连，并且都在运行 EIGRP 路由协议。

R1 和 R2 可以 ping 通其邻居的直连串行接口，但无法与邻居建立起EIGRP 相邻关系。

应采取什么措施来解决此问题？启用两台路由器的串行接口。

配置 EIGRP 以发送定期更新。

在路由器之间配置相同的 hello 发送间隔。

使用相同的 EIGRP 进程 ID 配置两台路由器。

窗体底端5窗体顶端请参见图示。

对于发往 192.168.2.0 的数据包，R2 会采取什么操作？它会丢弃数据包。

它会通过 S0/0/0 接口转发数据包。

它会通过 Fa0/0 接口转发数据包。

它会将数据包转发给 R1。

窗体底端窗体顶端请参见图示。

为实施 RIPv2 协议，网络管理员运行了所示命令。

但是， show ip protocol 命令未显示任何输出。

管理员应如何解决该命令没有输出的问题？添加 default-information originate 命令。

思科网院-网络工程-CCNA1-2017计算机科学与技术-一到十一章-题库及答案

某公司正在考虑是使用客户端/服务器还是对等网络。

下列哪三项是对等网络的特征？（选择三项。

）哪种设备的功能是确定消息在网际网络中传输的路径？哪两个条件有助于您从各种网络介质当中选择一种网络介质？（请选择两项。

）下列哪两项描述了中间设备？（选择两项。

）网络上的终端设备有哪两项功能？（选择两项。

）由于许多学生带着自己的平板电脑和智能手机去学校访问学校资源，大学里的IT 人员最有可能需要重新设计的网络区域是什么？家庭用户必须要有哪种网络类型访问才能进行网上购物？一位分支机构办公室的员工正在为客户创建报价。

为此，该员工需要访问位于总部办公室的内部服务器上的机密定价信息。

该员工将要访问哪种类型的网络？下列哪两种连接选项可以为家庭办公室中的计算机提供始终在线的高带宽Internet 连接？（选择两项。

）下列哪两个Internet 连接选项不需要建筑物铺设物理电缆？（请选择两项。

）以下哪种术语描述了当对网络资源的请求超出可用容量时网络的状态？哪种类型的网络流量需要QoS？以下哪项表述准确定义了术语“带宽”？网络管理员正在实施一种要求复杂强密码的策略。

该策略支持哪种数据保护目标？下列哪种说法正确描述了云计算的特征？什么是Internet？下列哪种说法描述了电力线网络技术的用途？哪种安全侵犯会对家庭用户的生活造成最大损害？一位用户正在一个小型办公室网络上实施安全策略。

以下哪两种操作将为此网络提供求？（选择两项。

）A网络能够通过相同的通信通道传输语音、视频、文本和图形。

填空题。

缩写词是指允许员工在公司办公室中使用其个人设备访问网络和其他资源的策略。

正确答案：byod将每个描述与网络通信形式配对请将每个特征对应的internet连接类型进行匹配将每个定义与安全目标配对操作软件内核的作用是什么？网络管理员与交换机建立远程CLI 连接对其实施管理时，需要确保用户ID、密码和会话内容的保密性。

应当选择哪种访问方法？当在安全环境下执行初始配置时，下列哪个程序可用来访问Cisco 2960 交换机？哪个命令或组合键让用户返回命令层级中的上一级？某台路由器具有有效的操作系统，且NVRAM 中存储有配置文件。

大二思科考试题库和答案

大二思科考试题库和答案一、单项选择题（每题2分，共20分）1. 思科公司（Cisco）成立于哪一年？A. 1984年B. 1990年C. 1995年D. 2000年答案：A2. 以下哪个协议是用于在IP网络中传输数据的？A. HTTPB. FTPC. TCPD. IP答案：D3. 在OSI模型中，哪一层负责建立、维护和终止通信会话？A. 应用层B. 传输层C. 会话层D. 网络层答案：C4. 以下哪个设备不是网络交换机？A. Layer 2 SwitchB. Layer 3 SwitchC. RouterD. Hub答案：D5. 以下哪个命令用于在Cisco设备上显示当前配置？A. show running-configB. show startup-configC. show interfaceD. show ip interface brief答案：A6. 在Cisco设备上，哪个命令用于保存当前的配置到启动配置文件？A. copy running-config startup-configB. copy startup-config running-configC. save running-configD. write memory答案：A7. 以下哪个命令用于在Cisco设备上创建一个新的VLAN？A. vlan databaseB. configure terminalC. enableD. show vlan答案：A8. 以下哪个命令用于在Cisco设备上将接口配置为Trunk模式？A. switchport mode accessB. switchport mode dynamicC. switchport mode trunkD. switchport mode static答案：C9. 以下哪个协议用于在IP网络中自动分配IP地址？A. DHCPB. DNSC. FTPD. HTTP答案：A10. 在Cisco设备上，哪个命令用于查看设备的接口状态？A. show interfacesB. show ip interface briefC. show running-configD. show vlan答案：B二、多项选择题（每题3分，共15分）11. 以下哪些协议属于TCP/IP模型的应用层协议？A. HTTPB. FTPC. SNMPD. IP答案：A, B, C12. 在Cisco设备上，以下哪些命令用于配置接口？A. interfaceB. ip addressC. no shutdownD. enable答案：A, B, C13. 以下哪些设备可以作为网络的核心设备？A. SwitchB. RouterC. FirewallD. Hub答案：A, B14. 以下哪些命令用于在Cisco设备上查看网络信息？A. show ip routeB. show running-configC. show interfaceD. ping答案：A, C, D15. 以下哪些因素可以影响网络的性能？A. 带宽B. 延迟C. 丢包率D. 网络拓扑结构答案：A, B, C, D三、填空题（每题2分，共20分）16. 在Cisco设备上，使用________命令可以进入特权模式。

思科网络试题库

二、单选题1、 ADSL MODEM不能激活，打一个电话或振一下铃就好了，其原因可能是A、分离器损坏;B、modem工作不稳定;C、电话机有问题;D、线路接触面氧化;答案为d6、172.16.99.99/255.255.192.0 的广播地址是什么?A、172.16.99.255;B、172.16.127.255;C、172.16.255.255;D、172.16.64.127; 答案为b7、190.233.27.13./16所在网段地址A、190.233.0.0;B、190.0.0.0;C、190.233.27.0;答案为a8、224.0.0.5代表的是（）地址。

A、主机地址;B、广播地址;C、网络地址;D、组播地址;答案为d10、ATM协议工作在________层。

A、物理层;B、链路层;C、网络层;D、传输层;答案为b11、ATM信元是定长的，而且信元的长度较小，只有（）字节。

A、33;B、43;C、53;D、63;答案为c23、DHCP客户端申请一个新的IP地址之前，使用的初始IP地址是________。

A、0.0.0.0;B、127.0.0.1;C、255.255.255.255;D、169.254.1.1 ;答案为a24、DNS工作于（）A、网络层 ;B、传输层;C、会话层;D、表示层;E、应用层;答案为e26、D类地址的缺省子网掩码有（）位A、8;B、16;C、24;D、 None;答案为d28、FDDI 使用的是（）局域网技术A、以太网;B、快速以太网;C、令牌环;D、令牌总线;答案为c29、IEEE 802.4是下面哪一种局域网标准？正确的选项是A、以太网;B、生成树;C、令牌环;D、令牌总线;答案为d30、IEEE于1999年颁布了用以标准化VLAN实现方案的________协议标准草案。

A、802.1B;B、802.1D;C、802.1P;D、802.1Q;答案为d32、IP报文头中固定长度部分为多少字节？A、10;B、20;C、30;D、40;答案为b33、IP报文中一部分字段专门用来描述报文的生命周期，即TTL值，它的最大值是________。

思科网络技术学院复习题

思科网络技术学院复习题广西大学思科网络技术学院2006.9第一部分、网络基础1、Refer to the exhibit. What i s the order of the TCP/IP Protocol Data Units as data i s moved as indicated through the OSI model?A. data, segments, frames, packets, bitsB. data, packets, segments, frames, bitsC. data, segments, packets, frames, bitsD. data, packets, frames, segments, bits2、Which protocol s are TCP/IP applicati on layer protocols? (Choose two.)A. UDPB. FTPC. IPD. SMTPE. TCP3、Which of the following are primary functions of a router? (Choose two.)A. packet switchingB. microsegmentationC. domain name resolutionD. path selectionE. flow control4、Which devices can be used to convert the data from a WAN router at the customer site into a form acceptable for use by the WAN service provi der? (Choose three.)A. Ethernet switchB.DTEC. ModemD. hubE. DCE deviceF. CSU/DSU5、A network user is using the FTP protocol to transfer data from the local host to an FTP server. The local host is also using the SNMP protocol to report the system status to the network management system. Which statement describes the communication from the host?A. FTP and SNMP will use the same port number.B. FTP uses TCP to establish a session before any data is transferred.C. The UDP session will reorder the SNMP data as it i s received by the network management system.D. The TCP protocol for the FTP transfer will use a random destination port number to the FTP server.6、Which technologies are considered to be WAN technol ogies? (Choose two.)A．Ethernet B.DSL C. Token RingD. Frame RelayE. FDDI7、What are three characteristics of the TCP protocol? (Choose three.)A．exchanges datagrams unreliablyB．is used to send IP error messagesC．forces the retransmission of unacknowledged packetsD．creates a virtual session between end-user applicati onsE．carries the IP address of the destination host in the TCP headerF．is responsible for breaking messages into segments and reassembling them at their destination8、Which binary number is a representation of the decimal number 248?A．11101000 B.11110100C. 11111000D.11111010第二部分以太网技术1、Refer to the exhibit. Which type of cabling should be used at each of the connection points shown?A、A-crossoverB- straight-through C-straight-through D-fiberE-straight-through B、A-crossoverB-crossoverC-straight-through D-fiberE-crossoverC、A-straight-through B-crossoverC-straight-through D-fiberE-straight-through D、A-fiberB-crossoverC-straight-through D-crossoverE-straight-through E、A-straight-through B-crossoverC-crossoverD-fiberE-straight-through F、A-crossoverB-crossoverC-straight-through D-fiberE-straight-through2、How many broadcast domains are shown in the diagram?A. ThreeB. fourC. fiveD. SixE. sevenF. eight3、Refer to the exhibit. A company needs to attach workstation E at a point 150 meters from an existing hub. What device should be placed at location D to allow the new host to connect to the network with the least amount of latency?A．Router B. switch C. bridge D. repeater4、What is the correct number of usable subnetworks and hosts for the IP network address 192.168.99.0 subnetted with a /29 mask?A．6 networks / 32 hosts B. 14 networks / 14 hostsC. 30 networks / 6 hostsD. 62 networks / 2 hosts5、Refer to the exhibit. Workstation 1 pings the Fa0/1 interface of Router 1. Which MAC address will workstation 1 obtain during the ARP request for this communication?A. 00-06-5B-88-DF-C3B. 00-B0-D0-7F-F7-46C. 00-0F-24-85-75-C0D. 00-0B-E5-64-BD-44E. 00-08-A3-B6-CE-02F. 00-08-A3-B6-CE-036、A collision has occurred on an Ethernet network. Which three statements explain the CSMA/CD process? (Choose three.)A. After the jam signal, all transmission stops for a random period.B. When the collision is detected, the hosts stop transmission immediately.C. When the collision is detected, the hosts stop transmission after eight microseconds.D. When the backoff period expires, the hosts involved in the collision have priority to transmit.E. When the backoff period expires, each host checks to see whether the networking media i s idle and then attempts to transmit.F. When the collision i s detected, the hosts continue to transmit using a jam pattern for a short time to ensure that all hosts detect the collision.7、Refer to the exhibit. What is the purpose of the highlighted address?A. It allows the NIC to communicate with other devices on the same network.B. It identifies which part of the IP address is to be considered the network portion.C. It provides an address to which all packets that do not have a specific route are sent.D. It uniquely identifies the NIC to the free token that is passed on the Ethernet network.第三部分TCP/IP协议集和IP寻址1、Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through 172.16.159.255?A．172.16.128.0 255.255.255.224B．172.16.128.0 255.255.0.0C．172.16.128.0 255.255.192.0D．172.16.128.0 255.255.224.0E．172.16.128.0 255.255.255.1922、A company has the following addressing scheme requirements:-currently has 25 subnets-uses a Class B IP address-has a maximum of 300 computers on any network segment-needs to leave the fewest unused addresses in each subnetWhat subnet mask is appropriate to use in this company?A. 255.255.240.0B. 255.255.248.0C. 255.255.254.0D. 255.255.255.0E. 255.255.255.128F. 255.255.255.2483、A NIC of a computer has been assigned an IP address of 172.31.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?A. 172.31.0.0B. 172.31.160.0C. 172.31.192.0D. 172.31.248.0E. 172.31.192.160F. 172.31.192.2484、Refer to the exhibit. Host A is being manually configured for connectivity to the LAN. Which two addressing scheme combinations are possible configurations that can be applied to the host for connectivity? (Choose two.)A. Address - 192.168.1.14Gateway - 192.168.1.33B. Address - 192.168.1.45Gateway - 192.168.1.33C. Address - 192.168.1.32Gateway - 192.168.1.33D. Address - 192.168.1.82Gateway - 192.168.1.65E. Address - 192.168.1.63Gateway - 192.168.1.65F. Address - 192.168.1.70Gateway - 192.168.1.655、Refer to the exhibit. What device does Device X represent in the graphic to allow PC1 to ping PC4?A. hubB. routerC.bridgeD.access pointE. Layer 2 switch6、Which type of address is 223.168.17.167/29?A. host addressB.multicast addressC. broadcast addressD. subnetwork address。

思科第二学期答案1-4章

思科第二学期答案1-4章(总10页)--本页仅作为文档封面，使用时请直接删除即可----内页可以根据需求调整合适字体及大小--第一章路由和数据包转发介绍1．哪两项说法正确描述了路由器的组件（选择两项）（B、D）A．RAM 永久存储着在启动过程中使用的配置文件 B．ROM 含有硬件模块所执行的诊断程序C．NVRAM 存储着在启动过程中使用的 IOS 的备份副本 D．重新启动时闪存中的内容不会丢失E．ROM 包含最新而且最完整的 IOS 版本 F．闪存包含用于标识 IOS 位置的启动系统命令2．图中的哪些接口可用于租用线路 WAN 连接（选择两项）（A、D）A．1B．2C．3D．4E．5F．63．如果路由器在启动时无法找到有效的配置文件，将发生什么情况（B）A．启动过程将重置 B．路由器将提示用户进行响应，以进入设置模式 C．启动过程将停止，直到获得有效的配置文件D．路由器将根据上次的有效配置生成默认配置文件 E．路由器将监控本地流量，以确定路由协议配置要求4．以下哪一项正确描述了路由器启动时的顺序（A）A．加载 bootstrap、加载 IOS、应用配置 B．加载 bootstrap、应用配置、加载 IOSC．加载 IOS、加载 bootstrap、应用配置、检查硬件 D．检查硬件、应用配置、加载 bootstrap、加载 IOS5．加载配置文件时的默认顺序是怎样的（C）A．NVRAM、FLASH、ROM B．FLASH、TFTP、CONSOLE C．NVRAM、TFTP、CONSOLE D．FLASH、TFTP、ROM6．在启动过程中，路由器可以从哪些位置加载 Cisco IOS（选择两项）（B、E）A．RAM B．TFTP 服务器 C．NVRAM D．设置例程 E．闪存 F．终端7．下列哪些是路由器的功能（选择三项）（A、C、D）A．分组交换 B．网段扩展 C．广播域分段 D．根据逻辑编址选择最佳路径 E．根据物理编址选择最佳路径8．当路由器收到从一个网络发往另一个网络的数据包时，它会执行哪三个过程（选择三项）（A、D、E）A．通过解开第 2 层帧报头来解封第 3 层数据包 B．通过 IP 报头中的目的 MAC 地址在路由表中查找下一跳地址C．解封第 3 层数据包时将第 2 层帧报头保持原样 D．通过 IP 报头中的目的 IP 地址在路由表中查找下一跳地址E．将第 3 层数据包封装成新的第 2 层帧，并将该帧从送出接口转发出去F．将第 3 层数据包封装成特殊的第 1 层帧，并将该帧转发到送出接口9．网络管理员需要通过路由器的 FastEthernet 端口直接连接两台路由器。

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

思科_第二学期_答案_1-4章

1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、J2您所在的网际网络发生了路由问题。

要鉴别此错误，应该检查以下哪种类型的设备？接入点主机集线器路由器交换机3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。

要确认路由器接口工作正常，应该从此主机ping 哪个地址？127.0.0.1192.168.64.196192.168.254.1192.168.254.9192.168.254.2544下列哪三项陈述说明了传输层协议的特征？（选择三项）应用层协议使用TCP 端口号和UDP 端口号。

TCP 使用端口号提供可靠的IP 数据包传输。

UDP 使用窗口和确认获得可靠的数据传输。

TCP 使用窗口和定序提供可靠的数据传输。

TCP 是面向连接的协议。

UDP 是无连接协议。

5OSI 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6由于发生安全规规事件，必须更改路由器口令。

从以下配置项可获知什么信息？（选择两项。

）Router(config)#line vty 0 3Router(config-line)# password c13c0Router(config-line)#login这些配置项对远程访问指定了三条Telnet 线路。

这些配置项对远程访问指定了四条Telnet 线路。

这些配置项将控制台口令和Telnet 口令设置为"c13c0"。

因为Telnet 配置不完整，所以Telnet 访问将遭到拒绝。

允许使用"c13c0" 作为口令访问Telnet。

7请参见图示。

电缆1 和电缆2 的两端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网络技术人员在该网段不同网络组件之间已经安装的电缆。

根据给定的数据回答，哪些网段的电缆安装正确？（选择三项）网段1网段2网段3网段4网段58下列哪种提示符代表适合copy running-config startup-config命令使用的模式？Switch-6J>Switch-6J#Switch-6J(config)#Switch-6J(config-if)#Switch-6J(config-line)#9请参见图示。

(完整word版)网络思科1-6章考试题整合

第一章1.下列哪三个网络工具可以为家庭用户提供最低安全保护？（请选三项。

）BCFA.入侵防御系统B.反间谍软件C.防病毒软件D.访问控制列表E.电力线网络F.防火墙2.哪个表达准确定义了术语“拥塞”？DA.网络数据传送能力的一项衡量标准B.限制硬件或软件故障对网络的影响的一种方法C.管理网络资源使用率的一套技术D.网络资源需求超出可用容量的一种状态3.下列哪种说法正确描述了云计算的特征？DA.企业可以直接连接到 Internet，而不需要使用 ISPB.需要投资新的基础设施才能访问云。

C.设备能够通过现有电线连接到 Internet。

D.通过订阅可以使用 Internet 访问应用程序。

4.填空题缩写词（byod）是指最终用户使用个人设备访问公司网络和资源的趋势。

5.哪两个 Internet 解决方案可以为 LAN 上的计算机提供始终在线的高带宽连接？（请选择两项。

）BEA.卫星B.DSLC.移动电话D.电话拨号E.电缆6.要求使用复杂的强密码是为了实现下列哪个网络安全目标？BA.确保冗余B.确保数据保密性C.确保访问的可靠性D.维护通信完整性7.下列有关 LAN 和 WAN 两者关系的说法，哪两项是正确的？（请选择两项。

）ABA.与 LAN 连接内部终端设备相比，WAN 连接 LAN 的带宽速度较低。

B.WAN 通常通过多个 ISP 运营，而 LAN 通常由一个组织或个人运营C.WAN 必须是公共的，而 LAN 可以由公有或私有实体拥有。

N 和 WAN 均能连接终端设备。

E.Internet 属于 WAN。

8.选择网络介质时应遵循哪两个标准？（请选择两项。

）BEA.网络上使用的终端设备的成本B.介质可以成功传送信号的距离C.需要优先处理的数据类型D.安装在网络中的中间设备的数量E.要安装介质的环境9家庭用户必须要有哪种网络类型访问才能进行网上购物？DA.外联网B.内部网C.局域网D.Internet10电路交换网络有何特征？BA.如果电路发生故障，呼叫将转发到新的路径。

思科第2学期第2章答案

下列哪两种网络设计功能需要生成树协议(STP) 来确保正确的网络操作？（请选择两项。

）静态默认路由实施 VLAN 以包含广播1第 2 层交换机之间的冗余链路提供冗余路由的链路状态动态路由消除多个第 2 层交换机的单点故障答案说明最高分值correctness of response Option 3 and Option 5 are correct.2第 2 层环路有什么特征？广播帧转发回发送方交换机。

帧的生存时间属性设置为无限。

2路由器连续向其他路由器转发数据包。

交换机连续转发相同的单播帧。

答案说明最高分值correctness of response Option 12第 2 层广播风暴的结果是什么？交换机拥塞时，路由器将接管转发帧的角色。

新的流量将会被交换机因无法处理而丢弃。

3CSMA/CD将使每台主机继续传输帧。

答案说明最高分值correctness of response Option 22哪种信息包含 BPDU 中的 12位扩展系统ID？MAC地址VLAN ID4IP 地址端口 ID答案说明最高分值correctness of response Option 22下列哪三个部分可以组合形成网桥ID ？端口 IDIP 地址扩展系统 ID5MAC地址网桥优先级开销答案说明最高分值correctness of Option 3, Option 4, and Option 5 are3 response correct.哪个 STP 优先级配置可以确保交换机始终是根交换机？spanning-tree vlan 10 priority 0spanning-tree vlan 10 priority 614406spanning-tree vlan 10 root primaryspanning-tree vlan 10 priority 4096答案说明最高分值correctness of response Option 12下列哪种协议提供多达 16 个 RSTP 实例，能将具有相同物理和逻辑拓扑的多个 VLAN 结合为实例，并为 PortFast 、BPDU防护和 BPDU 过滤、根防护和环路防护提供支持？STP快速 PVST+7PVST+MST答案说明最高分值correctness of response Option 42由于假设整个桥接网络中只有一个生成树实例，哪两种生成树协议可能导致不理想的数据流？项。

思科（CISCO）笔试题目、解析和答案

思科（CISCO）笔试题目、解析和答案一题：解：求至少几人及格，也就是求最多多少人不及格，情况分为：做对0个，做对1个，做对2个，做对3个，做对4个，做对5个，为了使不及格人最多，不妨对做对0个的人说，为何不把你的做错的两道给做对3个或4个的人呢，这样你还是不及格并且可以多增加人不及格，这样做对0个把自己的错误2个题给别人，他错3个，同理做对1个的把自己的一个错误题给别人，这样保证了不及格人最多，经过以上分析，现在不及格人最多时，只有一下几种情况：做对2个，做对3个，做对4个，做对5个。

分别设人数为：x2,x3.x4.x5，则：当x2最大是，至少及格人数为：100-x2x2+x3+x4+x5=100 (1)总错误题数为：100*5-（80+72+84+88+56）＝120则：3x2+2x3+x4=120 (2)(2)-(1)得：2x2+x3-x5=20 (3)可以看出要想使x2最大，则x3最小，x5最大，则：x3=0,x5=56,则x2=38,x4=6,即做对2个38，做对3个0，做对4个6，全对56。

也就是说至少有100-x2=100-38=62人及格，对结果进行分析：对于第五题只有56人做对，那么38+6=44，即做对4个和做对2个的都有第五题做错，那么做对2个的38人只能在前4道题中错2道：显然很好分配，分法之一：38-28＝10，做错1和2的10人，做错1和3的20-10＝10人，做错2和3的16-10＝6人，做错2和4的12人。

二题：10人和一个司机时间最少，则车接第十人正好与前面9个人一起到达终点设第一个人坐车t1小时，步行t2小时，求t1+t2,则：100t1+5t2=1000 (1)假设在d点把第一人放下，在c点车回来接到第二人，则车从d-c时间为：t＝(100t1-5t1)/105,设从车载第二人开始开始到车追上第一人时，第一个走了s公里到达e点则：车在c点时，车与第一人的距离为105t＝100t1-5t1=95t1，则：(95t1+s)/100=s/5 (2)即：5t1=s第一人从d-e走了：5t+s公里同理可知第三人到第10 人与第二人一样，则车一共送10人次，回头接人（空车）9次则第一人共走了9*（5t+s）=5t2即：9*[5*(100t1-5t1)/105+s]=5t2 (3)由（1），（2）（3）可得：t1=70/13,t2=1200/13,则：t1+t2=1270/13＝97.69小时。

思科试题1——精选推荐

思科试题1第⼆章⽹络通信001 TCP/IP ⽹络接⼊层有何作⽤？详细规定构成物理链路的组件及其接⼊⽅法002 下列哪些陈述正确指出了中间设备在⽹络中的作⽤？（选择三项）确定数据传输路径重新定时和重新传输数据信号管理数据流003下列哪三项陈述是对局域⽹(LAN) 最准确的描述？（选择三项）LAN 通常位于⼀个地域内。

此类⽹络由由⼀个组织管理。

LAN 为同⼀个组织内的⽤户提供⽹络服务和应⽤程序访问。

004 什么是PDU？特定层的封装005 OSI 模型哪两层的功能与TCP/IP 模型的⽹络接⼊层相同？（选择两项）物理层数据链路层006 以下哪种特征正确代表了⽹络中的终端设备？发送数据流007 第4 层端⼝指定的主要作⽤是什么？标识终端设备内正在通信的进程或服务008数据链路层封装添加的报尾信息有何主要功能？⽀持差错校验009封装的关键功能是什么？（选择三项）标识数据⽚段属于同⼀通信确保数据⽚段可以转发到正确的接收端设备实现完整消息的重组010 哪种设备被视为中间设备？交换机011在封装过程中，数据链路层执⾏什么操作？添加物理地址。

12.哪⼀层负责将数据段封装成数据包？答案：3，⽹络层013请参见图⽰。

所⽰⽹络属于哪⼀类型？LAN014请参见图⽰。

下列哪组设备仅包含终端设备？E、F、H、I、J015选择关于⽹络协议的正确陈述。

（选择三项）定义特定层PDU 的结构概述层与层之间通信所需的功能需要取决于协议层的封装过程016请参见图⽰。

IP 地址为10.0.0.34 的“⼿机A”已经与IP 地址为172.16.1.103 的“IP 电话1”建⽴了IP 会话。

请根据图⽰回答，下列哪个设备类型是对⽆线设备“⼿机A”功能的最准确描述？终端设备017请参见图⽰。

哪个⽹络术语描述了图中所⽰的数据交替发送过程？多路复⽤018请参见图⽰。

下列哪三个标签正确标识了图⽰⽹段的⽹络类型？（选择三项）⽹络B -- WAN ⽹络C -- LAN ⽹络A –LAN019请参见图⽰。

思科网络学院CCNA第二学期ERouter期末考试题2.docx

链路状态路由协议的路由更新中不包含子网掩码。链路状态路由协议根据跳数从高到低的顺序来确定最佳路径。
链路状态路由协议不适合具有特定层次结构的网络。链路状态路由协议仅向直连的邻居发送整个路由表。
Optio n1and Opti on 2 are correct.
14
网络管理员使用RIP路由协议在一个自治系统内实施路由。
2points for Option 1
19
请参见图示。所有路由器接口都配置了
IP地址且工作正常。如果没有配置任何路由协议或静态路由，那么路由器route命令输出中将包含什么信息？
所有192.168x0网络都将包含在路由表中。
到网络192.168.1.0/24、192.168.2.0/24和192.168.3.0/24的路由将包含在路由表中。
（选择两项。）
使用贝尔曼-福特算法确定最佳路径。
显示确切的网络拓扑图。
可以使大型网络快速收敛。
定期将完整的路由表发送给所有连接的设备。
在复杂网络和分层设计网络中很有用。
Optio n1and Opti on 4 are correct.
15
请参见图示。
这几台路由器已正确配置为使用动态路由协议（使用默认设置），并且网络已完全收敛。路
时，会发生怎样的转发行为？
数据包将被丢弃。
数据包将转发到“最后选用网关”。
数据包将与192.168.0.0网络匹配，并从Serial0/0转发出去。
数据包将与192.168.0.8子网形成最精确匹配，并从Serial0/1转发出去。
2poi nts for Optio n 1
so/u/u
R1#
＜省略部分输出〉
3192.16S.1.0/24 [1/0] via 172.16-2.2

思科网络技术学院第三学期官方测试总复习题

第一章Question 1分数: 1在处于不同的 VLAN 中的设备间配置通信需要使用OSI 模型中的哪个层？选择一个答案A. 第 3 层B. 第 1 层C. 第 4 层D. 第 5 层错误这次提交的分数：0/1。

Question 2 分数: 1推荐同时在核心层和分布层采用哪种分层设计特征以在发生路由故障时保护网络？选择一个答案A. 冗余B. PoEC. 访问列表D. 聚合正确这次提交的分数：1/1。

Question 3 分数: 1分层网络设计模型中的哪一层称为互连网络的高速主干层，其中高可用性和冗余性是该层的关键？选择一个答案A. 数据链路层B. 核心层C. 接入层D. 网络层E. 物理层F. 分布层正确这次提交的分数：1/1。

Question 4 分数: 1技术人员尝试向准备安装三台可堆叠交换机的客户解释 Cisco StackWise 技术。

下列哪种解释能准确说明 StackWise 技术？选择一个答案A. StackWise 技术可通过增加线路卡来扩展交换机功能和端口。

B. StackWise 技术最多可将八个端口绑定在一起以提高可用带宽。

C. 通过 StackWise 技术，交换机可使用现有以太网电缆为终端设备供电。

D. 通过使用完全冗余的背板，StackWise 技术最多可使九台交换机实现互连。

错误这次提交的分数：0/1。

Question 5 分数: 1企业级交换机有哪两项特点？（选择两项。

）选择至少一个答案A. 支持链路聚合B. 端口密度低C. 延时水平高D. 端口数量预先确定E. 转发速度高正确这次提交的分数：1/1。

Question 6 分数: 1网络技术人员应要求检查现有的交换网络。

检查结束后，技术人员提议添加新的交换机并更换影响性能的现有设备。

技术人员的建议获得了批准并得到预算上的支持。

以下哪两项信息有助于确定新交换机所需的端口密度？（选择两项。

）选择至少一个答案A. 转发速率B. 流量分析C. 未来的预计发展D. 接入层为提高性能所需的集线器数量E. 所需核心层连接的数量错误这次提交的分数：0/1。