1．Which statement about half-duplex Ethernet Operations is ture? A. With half-duplex transmission frames feed into a single cable in one direction at a time. B. half-duplex transmissino between stations is achieved by suing point-to-point Ethernet and fast Ethernet connections. C. Half-duplex transmission between stations is achieved by using point-to-multipoint Ethernet and Fast Ethernet connections. D. Half-duplex Ethernet technology PRovides a transmit circuit connection wired directly to receiver circuit at the other end of the connection. Answer：A B. point－to－point用于full－duplex，fast Ethernet支持half－duplex也支持full－duplex。 C．怀疑错在point－to－multipoint上，书上我没有找到。 D．full－duplex的功能而不是half－duplex 2. which command should you use to configure a router so that it can become a TFTP server host for a router system image that is run in Flash? a. copy flash tftp b. config tftp server c. write network d. tftp-server system e. setup server tftp Answer：D 命令出自Sybex P368 3．62.What are four functions/characteristics of the network layer of the osi model?(choose four.) *a. it uses a two-part address. b.it maintains routing tables. c. it uses broadcast addresses. d.it establishes network addresses. e. it provides access to the lan media. f.it provides media independence for upper layers. g.it provides path selection for internetwork communication. Answer:ABCG 这道题的C和D有争议，认为C错的理由是broadcast address并不是layer3特有，layer2也用broadcast address；认为D错的理由是establish这个用词有问题，大家自己看着办。 4．Which three statements about FR configurations using subinterfaces are true?(Choose three.) A.Each subinterface is configured either multipoint or point to point B.Any network address must be removed from the physical interface. C.The configuration of sub interfaces is done in router Config-(if)#mode. D.Frame relay encapsulation must be configured on each sub interface. Answer：ABC D错，must这个词用得有问题。C可能是bible的笔误，router Config-(if)#应该为router(Config-if)# 5. Question about PPP autentication. We have two cisco routers-Router1 and Router2 (there are hostnames of the routers). Router1 use username Router2 and passWord PasswordRouter1. How you set the username and password on Router2 for PPP autentication between Router1 and Router2? A. Username Router1 password PassRouter1 B. Username Router2 password Passrouter1 C. Username Router1 password PassRouter2 D. Username Router2 password Passrouter2 Answer:A 这个命令是：username 对方的名字password 相同的密码 6．Which command displays all routed protocols and the interface on which the protocol is enable? A. Show protocols B. Show protocols brief C. Show interfaces protocol D. Show interface E. Show routed F. Show routed interfaces Answer：A Sybex P275 7．(36).Which two statements about frame tagging are true? (Choose two ) A .A filtering table is developed for each switch B.Frame tagging assigns a unique user defined ID to each frame C.A unique identifier is placed in the header of each frame as it is forwarded between switches D.Frame tagging is a technique that examines particular information about each frame based on user defined offsets Answer：BC D．based on user defined offsets这里的表示有问题。
见Sybex P306 8.which two WAN data link layer protocols support multiple upper layer protocols? (Chose two.) A.PPP B.LAPD C.ISDN D.HDLC Answer：AD Sybex P482 9．Which sequence of actions will allow telneting from a user’s PC to a router using TCP/IP? 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. G. Connect the PC’s Ethernet port to the router’s Ethernet port using a straight-through cable. Answer: D 看仔细，这里用的是telnet，还有一道题是通过console。 telnet选D，假如是console则选B When trying to determine the type of cable needed for a port, look at the port and see if it is marked with an “X.” Use a straight-through cable when only one port is designated with an “X.” Use a crossover when both ports are designated with an “X” or when neither port has an “X.”（sybex P86） 10.Which line from a show spantree 1 command output indicates that virtual lan 1 (vlan1 )is functioning properly? a.root port is fast ethernet 0/26 b.port ethernet 0/1 of vlan1 is forwarding. c.designated port is ethernet 0/1 ,path cost 10. d.designated root has priority 0, address 00d0.588f.b600. e. vlan1 is executing the ieee compatible spanning -tree protocol. Answer：E 我觉得这道题应该有图，但没有在任何一份bible上看到图，因此答案我就不知道。E这句话正确，但不知道适不适用于这道题。 11．Which two statements about enabling the Novell IPX protocol on a router are true? A.NLSP supports primary and secondary network. B.You can apply a maximum of one input filter and one output filter per interface C.You can configure multiple IPX networks on any supported interface as long as each network uses a distinct encapsulation type. D.A logical network on an interface is considered to be a secondary network as long as you include the keyword secondary in the command.
E.Because subinterfaces are logical entities of a physical interface,any interface configuration paramenters that you specify.on an individual subinterface are applied to all subinterfaces for a given interface. Answer：CD A．NLSP是Netware Link Services Protocol，它是一个高级的链路状态路由协议，是由Novell开发的，计划替代RIP和SAP。 B的错误是，可以设IPX列表，和SAP列表。同方向、同接口有两个。 12．Which WAN technology uses high-quality digital lines and IS packet switched? C.ATM D.Frame Relay Answer FR是packet switched没有问题，sybex用的是high performance。 ATM在广域网上的性能肯定比FR要好，采用的是cell switched（非凡的packet switched），ATM同时也用于局域网（LANE），因此ATM能不能叫WAN technology也是一种疑问，同时ATM对NA并不要求。因此我偏向于选D。 同时有人以1000分通过考试，碰到这题也选D。 13．Which of the following is true concerning Frame Relay multipoint subinterfaces? A. An IP address is required on the physical interface of the central router. B. All routers are required to be fully meshed. C. All routers must be in the same subnet to forward routing updates and broadcasts D. Multipoint is the default configuration for Frame Relay subinterfaces. Answer: C B．假如只能用于fully meshed，那么就不用配置subinterface了。 D．在配置subinterface的时候，multipoint和point－to－point必须显示指出，他们都是不默认值（见人邮《思科网络技术学院》下册P274）
14．Wich of the following are true regarding passwords on a CISCO router? A. All passwords can be encrypted B.All passwords can be entered using the setup dialogue C.A password can be set before a user can enter the privileged mode?
D.A password can be set for individual lines E.TACACS or Radius password authentication can be used Answer：ACDE A,正确，只要用service password－encryption就可以了B.错误，只能设部分，不能全部。 C：不就是ENABLE么D.正确。 E：通过AAA认证是可以的，但这是NP的内容 15．Which of the following are true concerning distance vector and link state routing protocols? (Choose two.) A. Distance vector protocols send the entire routing table to directly connected neighbors. B. Link state protocols send the entire routing table to all routers in the network. C. Distance vector protocols send updates about directly connected neighbors to all networks listed in the routing table. D. Link state protocols send updates containing the state of their own links to all other routers on the network. Answer: AD 我考试的时候碰到这道题，我选AD，正确。 C的错误在于send updates about directly connected neighbors，而是整个路由表。 16. Which Layer 2 component connects the network media to the host? A. hub B. switch C. bridge D. NIC E. transceiver Answer 我考试也碰到了这道题，我选C，我在lan部分错了一道，估计就是这道错的。 A.E都是layer1的，BCD都是layer2的。“在网络中是NIC卡把设备连接到介质中。每一个NIC卡有唯一的MAC地址，它位于OSI参考模型的数据链路层。”（《思科网络技术学院》上册P18）
17．Which two commands show your access lists? (Choose two) A. Show filters. B. Show access-lists C. Show IP access-list D. Show running-Config Answer: BD testking edit 3选BC。BCD都能显示access lists，但BD显示全部，C只显示ip access lists（sybex书上有，具体页数我忘了） 18.Which statement about the Point-to-Point protocol (PPP) is true? A. PPP supports TCP/IP, but not Novell IPX B. PPP is being phased out of existence by the Serial Line Internet protocol C. PPP provides router-to-router and host-to-network connections over both synchronous and asynchronous circuits. D. PPP is an ITU-T and ANSI standard that defines the process for sending data over a packet-switched data network Answer: C B．SLIP是一种老的协议，正被PPP所代替；题目说反了。
19.What is the most common mail to device? A. Hub B. Router C. Repeater D. Switch Answer: D 这道题我没有看懂，出自testking。 20.The exhibit shows the Cisco routers startup messages. Which group of messages identifies the router components that you can configure during set up the initial system configuration? A) System Bootstrap, Version 11.3(1)XA, PLATFORM SPECIFIC RELEASE SOFTWARE (fc1) Copyright (c) 1998 by cisco Systems, Inc, CS2600 platform with 32768 Kbytes of main memory B) Rp,,pm 1 b f program load complete, entry point: 0x800008000, size: 0xef4e0 Self decompressing the image :############################[OK] C) Notice: NVRAM invalid, possible due to write erase, program load complete, entry point:0x80008000, size 0x415b20 Self decompressing the image: ################################### ##########################################################[OK] Restricted Rights Legend….(abridged) D) Cisco Internetwork Operating System Software IOC (tm) C2600 Software (C2600-JS-M), Version 11.3(2)XA, PLATFORM SPECIFIC RELEASE SOFTWARE (fc1) Copyright 1996-1998 by Cisco Systems Inc. Compiled 10-Mar-98 14:25 by gneale Image text-bas: 0x80008084, database: 0x809CD49C E) Cisco 2611 (MP C860) processor (revision 0x100) with 24576K/8192K bytes of memory, Processor board ID 04614954 M860 processor, part number 0 mask 32, Bridging software, X.25 software, Version 3.0.0, 2 Ethernet/IEEE 802.3 interface(s) Answer: D 原题问的好象不是这样。其意思是，那个信息反映了路由程序运行的地址。就是这段：Image text-bas: 0x80008084, database: 0x809CD49C（itpub马兄的解释） 21．You are configuring a new catalyst switch that you want to manage remotely from workstations on other network segment within your enterprise. Which of the following are required to allow remote management of the switch over IP? (Choose two.) 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 Answer: C 治理的是个交换机，交换机的IP是为了治理，在子借口上不能设地址。 22．You telnet to a host on a remote network which MAC address will be present in the ARP table when you issue the show ARP command ? A. MAC address of the destination host Ethernet port B. MAC address of the local router Ethernet port C. MAC address of the destination router Serial port D. MAC address of the local router Serial port Answer:B 菊花和itpub都讨论过N次。Show arp是cisco的命令，远程主机不管是windows还是unix，用的都是arp －a，因此A不选。这里的show arp把它解释成本地router上就是选B了。 23.Assuming routing protocol default timer settings.What is the maximum time before the routes 192.168.10.0 and 192.168.11.0 will be remove from the routing table? Router_B#show ip route Codes:C-connected,s-static,HGRP,R-RIP, M-mobile,B-BGP,D-EIGRP,EX-EIGRP external,O-OSPF,IA-OSPF inter area,EI-OSPF external typel,E2-OSPF external type2,E-EGP,I-IS_IS,L1-IS_IS LeveL-1,L2-IS_IS Llevel-2,*-candidate default,U-per-user static route Gateway of last resort is not set R 192.168.8.0/24[120/1]via 192.168.2.2,00J00:16,Serial 0 C 192.168.9.0 is directly connected,Serial 1 R 192.168.10.0/24 is possibley down,routing via 192.168.9.1 Serial 1
R 192.168.11.0/24 is possibley down,routing via 192.168.9.1 Serial 1
C 192.168.1.0 is directly connected,Ethernet 0 C 192.168.2.0 is directly connected ,Serial 0 R 192.168.3.0/24[120/1]via 192.168.2.2,00:00:17,Serial 0 R 192.168.4.0/24[120/1]via 192.168.2.2,00J00:17,Serial 0 R 192.168.5.0/24[120/1]via 192.168.2.2,00J00:17,Serial 0 R 192.168.6.0/24[120/1]via 192.168.2.2,00J00:17,Serial 0 R 192.168.7.0/24[120/1]via 192.168.2.2,00J00:17,Serial 0 A.30 seconds B.60 seconds C.240 seconds D.360 seconds E 630 seconds Answer：C AD是120，则是Rip，rip的flush timer为240s。
24.Given the configuration example interface ethernet0 ipx network 4a ipx access group 800 out interface ethernet1 ipx network 3d interface ethernet2 ipx network 5c access list 800 permit 3d 4a which two actions result from implementing this configuration? (Choose two) A.IPX network 5c will not receive any traffic B.Traffic from network 3d for network 4a will be forwarded out e0 C.Traffic from network 4a for network 3d will be forwarded out e0 D.Traffic from network 3d destined for network 4a will be forwarded out e2 E.The access list is applied to an outgoing interface and filters outbound traffic Answer：BE D错，network3d的traffic肯定不会跑到e2去，路由器肯定会转发到e0端口。B是正确的，假如到router e0的这个ipx地址，的确不会forword out，但e0上可以连接hosts，这个时候就要foroword out了。 25．You are the network administrator of the Tasti-Treats Cereal Company. You receive a call from a user who is unable to reach a server at a remote site. After further review you discover the following inFORMation: Local PC 10.0.3.35/24 Default Gateway 10.0.3.1 Remote Server 10.0.5.250/24 You then condUCt the following tests from the offending Local PC.: Ping 127.0.0.1 – Successful Ping 10.0.3.35 – Uuccessful Ping 10.0.3.1 – Unsuccessful Ping 10.0.5.250 – Unsuccessful Which of the following problems would create the test results listed above? A. TCP/IP not correctly installed B. Local physical layer problem C. NIC not functioning D. remote physical layer problem Answer：C ping 127.0.0.1是检测protocol stack，因此假如unsuccessful则选A ping 10.0.3.35 是检测NIC，假如unsuccessful则选C ping 10.0.3.1 是检测default way，假如unsuccessful则选B ping 10.0.5.250 检测远端主机，假如unsuccessful则选D 26．Calculate the number of usable networks and usable hosts for the network 201.105.13.0/26 A. 64networks and 4 hosts B. 4 network and 64 hosts C. 3 networks and 63 hosts D. 62 networks and 2 hosts Answer: C 正确答案应选2 networks and 62 hosts，并没有一个正确答案，“cisco有个习惯，假如没有正确的答案，你就应该选择最接近的答案。记住千万不能选完全正确但和题干一点关系也没有的答案。”（flyeagle语）。假如用了ip subnet－zero命令，则cisco支持全0和全1子网（在catalyst 交换机上，默认配置就是ip subnet－zero），这个时候就是4 networks and 62 hosts。Ip subnet－zero是NP的知识，NA不考虑。 另加一题各大bible可能没有收集的题。 Which Cisco IOS command confirms that a router has established Layer1 and Layer2 telephone company ISDN switch? A.show isdn active B.show isdn bri0/0 C.show isdn status D.show ip interface E.show isdn channel Answer:C Sybex关于isdn得那部分就有对C得具体解释。
