这些除了是我在准备考试中碰到的有争议或者有的知识点并没有学到而在论坛上发表求助的题目，还有一些则是在菊花论坛和itpub的cisco讨论区内讨论比较多的题目，我将之整理出来，希望对大家有帮助。感谢马儿，chenghit，乐乐，sunflower，kai，agui，sap1999等兄弟在我准备607考试中的帮助，以下题目绝大部分是他们的功劳。
　　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，如果是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（特殊的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．如果只能用于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