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1、22年思科认证考试题库精选6篇22年思科认证考试题库精选6篇 第1篇 访问控制列表分为标准和扩展两种。下面关于ACL的描述中，错误的是()。A.标准ACL可以根据分组中的IP源地址进行过滤B.扩展ACL可以根据分组中的IP目标地址进行过滤C.标准ACL可以根据分组中的IP目标地址进行过滤D.扩展ACL可以根据不同的上层协议信息进行过滤正确答案：C你将一台笔记本电脑直接连接到了路由器的以太网端口。为确保命令copy flash tftp成功地完成其任务,需要满足哪三个条件?()A.必须在路由器上运行TFTP服务器软件B.必须在笔记本电脑上运行TFTP服务器软件C.将笔记本电脑直接连接到路由器以太
2、网端口的以太网电缆必须是直通电缆D.笔记本电脑与路由器以太网接口必须位于同一个子网E.必须给命令copy flash tftp提供笔记本电脑的IP地址F.路由器闪存必须有足够的空间，能够存储要复制的文件答案：BDE 下列关于stub区域的描述，哪些是正确的（ ）A.stub区域是一种可选必选的配置属性，所有的每个区域都可配置B.stub区域是指那些不传播Type5（即引入的外部路由器）的LSA的区域C.该区域的ABR生成一条缺省路由（0.0.0.0）传播到区域内D.stub区域通常位于自治系统边界，是那些只有一个ABR的非骨干区域正确答案：BC在哪种情况下,可能在交换型LAN中传输单播帧的多个
3、副本?()A.流量很高时B.断开的链路重建后C.上层协议要求可靠性极高时D.未妥善实现冗余拓扑时答案：D将路由器的许可证删除包括哪两步?()A.使用命令erase flash:licenseB.重启系统C.使用命令license boot，并在末尾指定关键字disableD.使用命令license clear将许可证清除答案：CD22年思科认证考试题库精选6篇 第2篇 NAT可以被用于完成多种功能，以下不属于其功能的是：（）A.转换内部局部地址B.内部全局地址复用C.TCP负载均衡D.内部网络流量控制正确答案：D 将192.168.8.0/24192.168.15.0/24这8个网络进行精确汇
4、总，结果是()A.192.168.8.0/16B.192.168.15.0/21C.192.168.8.0/21D.192.168.15.0/16正确答案：C OSI七层模型中，数据链路层的数据封装名称为（）A.比特B.帧C.包D.段正确答案：B While troubleshooting an issue in the Ezonexam LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network
5、. From this statement, what is known about the network interface port?A. This is an Ethernet port operating at half duplexB. This is an Ethernet port operating at full duplexC. This is a port on a network interface card in a PCD. This is 10 MB/s switch portE. This is a 100 MB/s switch portF. None of
6、 the above正确答案：AA The Ezonexam network administrator needs to verify that switch interface 0/5 has been assigned to the Marketing VLA.N. Which command will accomplish this task?A. Show vlanB. Show mac-address-tableC. Show vtp statusD. show spanning-tree rootE. show ip interface briefF. None of the a
7、bove正确答案：AA 解析：Explanation:The show vlan command displays the configured vlan name and ID as well as the ports that belong to each VLAN, etc. By default all ports belongs to VLAN 1Note: You can also use: show vlan brief, show vlan ID where ID is the VLAN ID.22年思科认证考试题库精选6篇 第3篇 对于以下关于OSPFNSSA区域描述正确的是
8、()A.NSSA区域会自动下发一条七类的缺省路由B.完全NSSA区域会自动下发一条三类的缺省路由C.NSSA区域中不能包含ASBR路由器D.NSSA区域一般会部署在区域0E配置NSSA区域必须在该区域所有路由器上设置正确答案：BCD Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask would you use?A255.255.0.0.B25
9、5.255.128.0.C255.255.224.0.D255.255.254.0.ENone of the above正确答案：D解析：Explanation:Toobtain459hoststhenumberofhostbitswillbe9.Thiscansupportamaximumof510hosts.Tokeep9bitsforhostsmeansthelastbitinthe3rdoctetwillbe0.Thisgives255.255.254.0asthesubnetmask. 路由器上端口fa0/0,其最大传输速率是（）Mbit/sA.128B.10C.100D.1000正
10、确答案：C 当拓扑信息完成交换，相邻路由器具有相同的LSDB时，下列哪项OSPF邻居状态是希望得到的()A.2-WAYB.FULLC.ExchangeD.Loading正确答案：B 下面有关交换机的描述中，正确的是（）A.所有交换机都支持VLAN功能B.交换机端口数量最多为48口C.交换机独占带宽D.交换机端口的最大速率为100Mbit/s正确答案：C22年思科认证考试题库精选6篇 第4篇 在一个路由表中，有指向192.168.1.0/24的RIP路由下一跳为1.1.1.1，也有手动配置的静态路由192.168.0.0/16下一跳为2.2.2.2，当有目的地址为192.168.1.1的数据包到
11、达时，路由器会将该数据包转发到2.2.2.2，是否正确。此题为判断题(对，错)。正确答案： 影响OSPF两台路由器不能形成邻居的因素有哪一些（）。A.区域ID不同B.认证配置不同C.HELLO时间不同D.OSPF进程号不同正确答案：BC 在 RIPv1 配置中，如果为network命令地址部分输入的是接口IP地址而不是网络地址，路由器将拒绝执行该命令。此题为判断题(对，错)。正确答案： By default, which of the following factors determines the spanning-tree path cost?AIt is the individual l
12、ink cost based on latencyBIt is the sum of the costs based on bandwidthCIt is the total hop countDIt is dynamically determined based on loadENone of the above正确答案：B解析：Explanation:TheSTPcostisanaccumulatedtotalpathcostbasedontheavailablebandwidthofeachofthelinks.Note:Apathcostvalueisgiventoeachport.T
13、hecostistypicallybasedonaguidelineestablishedaspartof802.1d.Accordingtotheoriginalspecification,costis1,000Mbps(1gigabitpersecond)dividedbythebandwidthofthesegmentconnectedtotheport.Therefore,a10Mbpsconnectionwouldhaveacostof(1,000/10)100.Tocompensateforthespeedofnetworksincreasingbeyondthegigabitra
14、nge,thestandardcosthasbeenslightlymodified.Thenewcostvaluesare:Youshouldalsonotethatthepathcostcanbeanarbitraryvalueassignedbythenetworkadministrator,insteadofoneofthestandardcostvalues.IncorrectAnswers:A,D:TheSTPprocessdoesnottakeintoaccountthelatencyorloadofalink.STPdoesnotrecalculatethelinkcostsd
15、ynamically.C.HopcountsareusedbyRIProuterstocalculatethecostofaroutetoadestination.TheSTPprocessresidesatlayer2oftheOSImodel,wherehopcountsarenotconsidered. 以下哪些路由表项要由网络治理员手动配置()A.静态路由B.直接路由C.动态路由D.以上说法都不正确正确答案：A22年思科认证考试题库精选6篇 第5篇 请参见下图。可为图中所示的主机分配哪两个IP地址()A.192.168.65.31B.192.168.65.32C.192.168.65.
16、35D.192.168.65.60E.192.168.65.63F.192.168.65.64正确答案：CD How can a Ezonexam administrator determine if a router has been configured when it is first powered up?AA configured router prompts for a passwordBA configured router goes to the privileged mode promptCAn un configured router goes into the setup
17、 dialogDAn un configured router goes to the enable mode prompt正确答案：C解析：Explanation:If a non-configured router is started, then it goes into setup mode and ask for the minimum configuration parameters (hostname, IP address to interfaces, enable password, etc). If the router is already configured it b
18、oots by implementing the saved startup-config. At which layer of the OSI model does the protocol that provides the information displayed by the show cdp neighbors command operate?ATransportBPhysicalCApplicationDData linkENetwork正确答案：D解析：Explanation:CDP is a device discovery protocol that runs over L
19、ayer 2 (the data link layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches) and allows network management applications to discover Cisco devices that are neighbors of already known devices. With CDP, network management applications can learn the device type and th
20、e Simple Network Management Protocol (SNMP) agent address of neighboring devices running lower-layer, transparent protocols. Ezonexam needs to ensure their IP network can be reached from the Internet. Which of the following host addresses are members of networks that can be routed across the public
21、Internet? (Choose three.)A. 10.172.13.65B. 172.16.223.125C. 172.64.12.29D. 192.168.23.252E. 198.234.12.95F. 212.193.48.254正确答案：CEFC,E,F 解析：Explanation:In Internet terminology, a private network is a network that uses RFC 1918 IP address space. Computers may be allocated addresses from this address s
22、pace when its necessary for them to communicate with other computing devices on an internal (non-Internet) network but not directly with the Internet.Three blocks of IP addresses are reserved for private use and are not routed over the Internet. Companies can assign these addresses to nodes on their
23、 private LANs at any time without conflict. 路由器重新启动并进入设置模式。此问题的原因是什么（）A.IOS映像损坏B.闪存中缺少CiscoIOSC.NVRAM中缺少配置文件D.POST过程检测到硬件故障正确答案：C22年思科认证考试题库精选6篇 第6篇 以下（）LSA类型是ASBR来宣告外部路由信息的。（）A.类型1B.类型2C.类型3D.类型4E.类型5正确答案：E 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()A.因为RIPv1是无类协议，不支持该访问B.RI
24、Pv1不支持不连续网络C.RIPv1不支持负载均衡D.RIPv1不支持自动总结正确答案：B You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on
25、the Cisco switch?ASwitch(config)# switchport trunk encapsulation islBSwitch(config)# switchport trunk encapsulation ietfCSwitch(config-if)# switchport trunk encapsulation islDSwitch(config-if)# switchport trunk encapsulation ietfESwitch(config-if)# switchport trunk encapsulation dot1q正确答案：E解析：Explan
26、ation:The only real choices for setting up switching trunks are ISL and 802.1Q. ISL is Cisco proprietary, while 802.1Q uses the IEEE defined standard for trunking between switches.To configure the 802.1Q standard, the keyword dot1q is used in Cisco switches.Incorrect Answers:A, B, D. These are not v
27、alid options in a Cisco switch.C. ISL is a Cisco proprietary method for setting up trunks, and will only work between Cisco switches.要确保交换机成为VLAN30的根网桥,可使用下面哪两个命令之一?()A.spanning-tree vlan 30 priority 0B.spanning-tree vlan 30 priority 16384C.spanning-tree vlan 30 root guaranteeD.spanning-tree vlan 30 root primary答案：AD 网络中经常使用DDN服务，请选出DDN的优点（）A.传输质量高B.接入方式灵活C.偷占带宽D.使用虚电路E.专用线路正确答案：ADE