QUESTION NO: 2
You are implementing a new frame relay network to provide connectivity between
you offices. To do this, you set up the frame relay network using point-to-point
subinterfaces.
Which of the following does NOT need to be configured?
你正在两个办公场所之间实现一条新的帧中继网络,配置时候使用了点对点的子接口模式,
下列那个项目是不需要配置的?

A. The Frame Relay encapsulation on the physical interface.
B. The local DLCI on each subinterface.
C. An IP address on the physical interface.
D. The subinterface type as point-to-point.

解析:配置子接口时,一般物理接口上不用配置IP地址,我们应该将IP地址配置到具体的子接口上.
封装类型,DLCI和接口类型是必须有的.

答案:C

QUESTION NO: 3
After the router interfaces shown in the diagram have been configured, it is
discovered that hosts in the Branch LAN cannot access the Internet.
Further testing reveals additional connectivity issues.
What will fix this problem?

网络现在已经配置成下面的样子,结果发现Branch的主机访问不了Internet.物理连接都没有问题,那么请找出解决方法?



A. Change the address of the Branch router LAN interface.
B. Change the address of the Branch router WAN interface.
C. Change the subnet mask of the HQ router LAN interface.
D. Change the address of the HQ router LAN interface.

解析:看图可知.两个路由器之间的串行链路的两个IP竟然不在一个网段里面,所以不通.
只要将192.168.10.82/30修改为192.168.10.86/30便可.
其实选项中有三个LAN口,完全可以判断答案是B

答案:B

不错.谢谢LZ正在自学那

谢谢楼主，辛苦你了～！

QUESTION NO: 4
A portion of he TestKing network is shown in the diagram below:
Consider the 192.1.1.0/24 network in this exhibit. This network uses RIP v2.
Which combination of subnetwork assignments will satisfy the requirements for
networks A, B, and C of this design? (Select three)

下图是TK公司的部分网络,对于图中的192.1.1.0/24网络使用了RIP v2路由协议
下列哪三个子网的组合可以满足三个网段的需求?



A. Network A = 192.1.1.128/25
B. Network A = 192.1.1.0/25
C. Network B = 192.1.1.252/30
D. Network B = 192.1.1.4/30
E. Network C = 192.1.1.64/26
F. Network C = 192.1.1.224/27

解析:此题很有意思,从图中看到网络A需要120个主机地址,可见A和B都满足要求
B的主机个数未知,但串行链路自然用/30,C和D都可以
C的主机需要量为55,2的8次方-2=62满足,那么主机留6位,子网用/26,可见E是一个答案
既然192.1.1.64网段被使用了,就是说192.1.1.65~192.168.1.127不能再分给别人了,从而把选项B排除在外
这样192.1.1.129~192.1.1.254留给网络A了,这样选项C就不能给网络B了

答案:A,D,E

QUESTION NO: 5
The TestKing network topology is displayed in the following diagram:
Assume that RIP v1 is the only routing protocol in use. What is the Maximum
number of usable IP address that can be supported on each LAN if the TestKing
network is using one Class C address block?
网络中使用的路由协议是RIP v1 如果网络使用了C类地址,那么每个网络最多支持多少个可用的主机地址?



A. 14
B. 16
C. 30
D. 32
E. 62
F. 64

解析:网络使用的是C类地址,而且还要划分子网,
但是RIP v1不支持VLSM,要求我们的掩码必须相同.
图中算起来有6个网络和6个链路,子网需要12个,掩码自然是借用4位.
那么每个网段主机数2的4次方-2=14个(看来浪费了一些)

答案:A

QUESTION NO: 6
You are a technician at TestKing. Your newly appointed TestKing trainee wants to
know what the CDP is.
What would your reply be? (Choose all that apply.)
作为TK公司的技术员,你需要让实习生理解CDP的含义,你应该做哪些知识准备(多选)

A. It is globally enabled by default on Cisco routers.
B. It is globally enabled by default on all routers.
C. It is a proprietary protocol.
D. It is a non-proprietary protocol.
E. It can be used to gather hardware and protocol information about neighbor devices.

解析:本题考察CDP协议的含义
CDP(Cisco Discovery Protocol，Cisco发现协议)是工作在数据链路层上的协议，是Cisco专有的协议，用于发现和查看相邻的Cisco设备的简单配置信息。 CDP协议是第二层的协议，它不需要IP协议或其他的第三层协议的启动即可工作，记住这一点非常重要。

答案:A,C,E

QUESTION NO: 7
Five different routers are connected via varying point to point circuit types as displayed below:
Which of the following statements are true regarding how router A will chose a path to router E? (Choose three)

如图:5个不同的路由器通过不同的点对点电路连接
路由器A怎样选择到达路由器E的路径呢?



A. If RIP is the routing protocol, router A will determine all paths have an equal cost.
B. If RIP is the routing protocol, router A will install only the ADE path in its routing table.
C. If IGRP is the routing protocol, router A will determine that path ACE has the lowest cost.
D. If IGRP is the routing protocol, router A will determine that path ADE has the lowest cost.
E. If RIP and IGRP are both configured on router A, the router will use the route information learned by IGRP.
F. If RIP and IGRP are both configured on router A, the router will use the route information learned by RIP.

解析:本题考察RIP和IGRP的相关概念
对于RIP来说,跳数是度量值,所以3条路径相等,并且自动支持多路径负载均衡.
对于IGRP来说,带宽和延迟是缺省度量值,所以IGRP会选择速度最快的T3
如果同时运行,IGRP的管理距离是100,RIP是120,所以使用IGRP给出的路径.

答案:A,D,E

UESTION NO: 8
You work as a network engineer at TestKing.com. You are required to allow establishment of a Telnet session with a router TestKingC.Which set command must be configured?

你是TK公司的网工,呢准备在路由器TeskingC上配置telnet会话,下列哪个指令序列正确.

A. TestKingC(config)# line console 0
TestKingC(config-line)# enable password testking
B. TestKingC(config)# line console 0
TestKingC(config-line)# enable secret testking
TestKingC(config-line)# login
C. TestKingC(config)# line console 0
TestKingC(config-line)# password testking
TestKingC(config-line)# login
D. TestKingC(config)# line vty 0
TestKingC(config-line)# enable password testking
E. TestKingC(config)# line vty 0
TestKingC(config-line)# enable secret testking
TestKingC(config-line)# login
F. TestKingC(config)# line vty 0
TestKingC(config-line)# password testking
TestKingC(config-line)# login

解析;本题考查CLI基本指令



Answer: F

QUESTION NO: 9
The TestKing WAN is depicted below:
As a network technician at TestKing.com you would like to implement NAT in the
network shown in the exhibit. You would like to allow inside hosts to use a private
addressing scheme. Where should NAT be configured?

网络拓扑如下,你需要实现NAT,你准备允许内部主机使用一个私有的网络地址架构,那么应该如何配置NAT?



A. TestKing1 router
B. TestKing2 router
C. TestKing3 router
D. All routers
E. All routers and switches

解析:网络地址转换是常用的内网IP映射为公网IP的技术,自然配置到内网和公网的接合处.路由器或者防火墙均可.

答案:A

QUESTION NO: 10
Which command will configure a default route on a router?
在路由器上配置缺省路由的指令是哪个?

A. router(config)# ip route 0.0.0.0 10.1.1.0 10.1.1.1
B. router(config)# ip default-route 10.1.1.0
C. router(config)# ip default-gateway 10.1.1.0
D. router(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1

解析:缺省路由代表当一个数据包的目的网段不在路由表里面的时候，路由器该把那个数据包发送到哪里.

Answer: D

QUESTION NO: 11
In which situation would the use of a static route be appropriate?
下列哪个环境适合使用静态路由?

A. To configure a route to the first Layer 3 device on the network segment.
B. To configure a route from an ISP router into a corporate network.
C. To configure a route when the administrative distance of the current routing protocol is too low.
D. To reach a network is more than 15 hops away.
E. To provide access to the Internet for enterprise hosts.

解析:静态路由是指由网络管理员手工配置的路由信息。当网络拓扑结构或链路的状态发生变化时，网络管理员需要手

工去修改路由表中相关静态路由信息。静态路由信息在缺省情况下是私有的，不会传递给其他的路由器。
静态路由适合小型,单路径,静态IP的网络环境,比如只有单一出口的末节网络.就像只有一条互联网链路的企业环境.

Answer: B

UESTION NO: 12
The TestKing WAN connection is shown below:
Based on this diagram, which two devices can be used to complete the connection
between the WAN router at the customer site and the service provider? (Choose two.)

公司广域网拓扑如下:在客户站点和服务提供商之间的广域网路由器之间可以使用什么设备以完成连接(2个答案).



A. CSU/DSU
B. modem
C. WAN switch
D. ATM switch
E. Frame Relay switch
F. ISDN TA

解析:从图中看出,DTE已经有了,需要DCE设备

DTE
Data Terminal Equipment -End of the user's device on the WAN Link.
数据终端设备
用户-网络接口的用户端设备，可用作数据源、目的地或同时作为这两者。DTE设备通过DCE设备（如调制解调器）连接
到数据网络，并且通常使用DCE产生的时钟信号。DTE包括诸如计算机、路由器和多路复用器之类的设备。

DCE
Data Communications Equipment -End of the WAN provider's side of the communication facility -Responsible for clocking
数据电路端接设备
组成用户-网络接口的网络端通信网络设备和连接。DEC提供到网络的物理连接，转发通信，并提供用于同步DCE和DTE
设备之间数据传输的时钟信号。调制解调器和CSU/DSU都是DCE的例子。

在广域网链路上，DTE是用户设备的终端点。DCE是用于将来自DTE的用户数据转换为提供广域网服务的设备所能接收的形式。

答案:A,B

QUESTION NO: 13
Which sequence of actions will allow telnet traffic from a user's PC to a router using TCP/IP?
下列那一个工作可以允许用户PC使用TCP/IP协议telnet到路由器上?

A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a crossover cable.
C. Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
D. Connect the PC's Ethernet port to the router's Ethernet port using a crossover cable.
E. Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
F. Connect the PC's Ethernet port to the router's Ethernet port using a straight-through cable.

解析:本题考察路由器调试方法,和console口不同.telnet代表利用IP地址远程登陆进行访问.
这种情况下,需要使用交叉线连接路由器的以太口.本质上都是计算机,相同设备.

答案

QUESTION NO: 14
You are given a PC, a router, and a cable. Select the correct combination that will allow you to log into the router locally using a terminal emulation program such as HyperTerminal.

一台PC,一台路由器,一条线缆,选择正确的组合来完成虚拟终端形式的路由器访问?

A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a rollover cable.
C. Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
D. Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
E. Connect the PC's Ethernet port to the router's Ethernet port using a straight- through cable.

解析:虚拟终端就是console口访问,当新路由器开箱时,没有配置IP等,只能使用虚拟终端来调试.
根据计算机端所使用的是串口还是并口，选择制作RJ-45-to-DB-9或RJ-45-to-DB-25转换用适配器，
线缆是翻转线



答案:B

QUESTION NO: 15
In this network, subnet 10.1.3.0/24 is unknown to router TK2. Which router command will prevent router TK2 from dropping a packet destined for the 10.1.3.0/24 network if a default route is configured?



网络中,子网10.1.3.0/24对路由器TK2来说是未知的,在配置了默认路由的情况下,哪条指令可以防止TK2将送往10.1.3.0/24的数据包丢弃?

A. ip classless
B. ip default-network
C. network 10.1.1.0
D. network 10.1.1.0.0.0.0.255 area 0

解析:路由器一般情况下认为每个接口上都有默认的子网掩码,当接受到不在路由表内的数据包时会丢弃.
如果想让路由器向某个具有一些已知子网的网络的一个未知子网数据包时能选择缺省路由,就必须启用ip classless
本例中,处于末节区域内的路由器Tk2使用默认路由将不属于本网段的数据包转发到TK1,如果没有启动ip classless
TK2就会认为它知道10.0.0.0的所有子网,而10.1.3.0又不在路由器内,所以丢弃.
启用之后,TK2对于未知网络或者已知网络的未知子网就会选择缺省路由.

答案:A

晕呀,帖子很不错啊 可我无福消受
总提示我 附件: 您所在的用户组无法下载或查看附件

QUESTION NO: 16
The TestKing network is replacing all of their hubs with new switches. How does a
switch differ from a hub?
TK公司正在用交换机替换网络中的集线器,请问交换机和集线器有何区别?

A. A switch operates at a lower, more efficient layer of the OSI model.
B. A switch does not induce any latency into the frame transfer time.
C. A switch decreases the number of collision domains.
D. A switch tracks MAC addresses of directly-connected devices.
E. A switch decreases the number of broadcast domains.

解析:交换机运行在第二层,根据目标MAC地址进行数据包转发
集线器运行在第一层,没有数据包识别能力,只对电信号简单的放大和发送
交换机的端口独享带宽,一个100M交换机的每个端口速率都是100M,端口之间是一条点对点的直连,每个端口都是一个冲突域.
集线器的端口共享带宽,连接电脑越多,每台电脑分的带宽越少,所有端口都在一个冲突域中.

Answer: D

QUESTION NO: 17
A network associate needs to configure a router by connecting a remote computer to
the router through the router auxiliary port. Which two statements describe the
hardware required to make the connection to the router? (Choose two.)

某网管需要从远程计算机通过auxiliary 端口配置一台路由器,关于如何连接下列哪两个选项说得对？

A. The auxiliary port must be connected to a modem.
B. The auxiliary port must be connected to an Ethernet LAN.
C. The technician needs an RJ-45 to DB25 adapter.
D. The technician needs an Ethernet transceiver.

解析:如果想使用AUX口连接调制解调器来远程配置路由器,需要一条浅蓝色控制线缆和一个DB9-DB25的转换器
1,线缆一端连接AUX的RJ45端口
2,线缆另一端连接转换器的DB9接口
3,转换器连接调制解调器的DB25接口





答案:A,C

QUESTION NO: 18
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following procedures are required to accomplish this task? (Choose three.)

现在需要配置一个现有的串行端口来接收一条第二条帧中继虚电路,哪三个步骤是正确的?

A. Encapsulate the physical interface with multipoint PPP.
B. Configure static Frame Relay map entries for each subinterface network.
C. Disable split horizon to prevent routing loops between the subinterface networks.
D. Remove the IP address from the physical interface.
E. Create the virtual interfaces with the interface command.
F. Configure each subinterface with its own IP address.

解析:一般来说,如果路由器仅仅配置一条PVC,那么可以直接配置到物理接口上,如果需要配置第二条,必须使用子接口模式.当然有点对多点和点对点模式.所以我们要

1,移去物理端口上的IP地址
2,建立子接口(指定工作模式)
3,在每个子接口上配置IP地址

下面是一个例子:
interface serial 0
encapsulation frame-relay
interface serial 0.1 point-to-point
ip address 10.0.1.1 255.255.255.0
frame-relay interface-dlci 142
interface serial 0.2 multipoint
ip address 10.0.2.1 255.255.255.0
frame-relay map 10.0.2.2 118

答案: D, E, F