QUESTION NO: 11
　　Spanning-Tree was originally developed by DEC. What is the reason Spanning-Tree is used in a switched LAN?
　　A. To provide a mechanism for network monitoring in switched environments.
　　B. To prevent routing loops in networks with redundant paths.
　　C. To prevent switching loops in networks with redundant switched paths.
　　D. To manage, the addition, deletion, and naming of VLANs across multiple witches.
　　E. To segment a network into multiple collision domains.
　　Answer: c
　　In TK, there is ‘routing switching’ in the answer C, but in the exam, is above.
　　
　　QUESTION NO: 18
　　What can you use to connect a user’s pc directly to a router?
　　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.
　　Answer: D.
　　***the answer D is correct,but lots of people confuse about the cable***
　　straight-through calbe and crossover cable are used to connect LAN interfaces!
　　when we connect pc-to-pc router-to-router pc-to-router switch-to-switch ... use crossover cable
　　when we connect pc-to-switch router-to-switch ...use straight-through cable
　　the rollover calbe can be used to connect console port and the PC's COM port.
　　
　　
　　QUESTION NO: 75
　　Consider Frame Relay multipoint subinterfaces. Which is a valid statement?
　　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: D
　　***the correct answer should be C***
　　Sybex study guide CCNA 3.0 page 522:
　　Multipoint Used when the router is the center of a star of virtual circuits. Uses a single
　　subnet for all routers’ serial interfaces connected to the frame switch.
　　Introduction to Cisco Rouer Configuration page 413:
　　You must specify either multipoint or point-to-point; there is no default.
　　
　　
　　QUESTION NO: 79
　　Answer Lab 3:
　　enable
　　config terminal
　　hostname Plain
　　enable secret TestKing
　　interface ethernet 0
　　ip address 192.168.65.1 255.255.255.0
　　no shutdown
　　exit
　　interface serial1
　　ip address 192.168.101.2 255.255.255.0
　　no shutdown
　　exit
　　router rip
　　network 192.168.65.0
　　network 192.168.101.0
　　network 192.168.55.0
　　network 192.168.149.0
　　network 192.168.199.0
　　^z
　　copy running-config startup-config
　　***the correct answer should be ***
　　enable
　　config terminal
　　hostname Plain
　　enable secret TestKing
　　interface ethernet 0
　　ip address 192.168.65.1 255.255.255.0
　　no shutdown
　　exit
　　interface serial1
　　ip address 192.168.101.2 255.255.255.0
　　no shutdown
　　exit
　　router rip
　　network 192.168.65.0
　　network 192.168.101.0
　　^z
　　copy running-config startup-config
　　***We need not add other three networks***
　　You can just follow the TK, but you will never get the total scour.
　　Ciscopress CCNA Exam 640-607 Certification Guide page 431:
　　The network command “matches” one or more interfaces on a router. For each interface,
　　the network command causes the router to do three things:
　　1 The router broadcasts or multicasts routing updates out an interface.
　　2 The router listens for incoming updates on that same interface.
　　3 The router, when sending an update, includes the subnet of that interface in the routing update.
　　
　　QUESTION NO: 109
　　Julia telnets to a pc on a remote subnet, 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: A
　　***the correct answer should be B***
　　the pc transfort the packets to local router, and the router find the best way to remote network, so we choose the answer B!
　　
　　
　　QUESTION NO: 133
　　You have a direct serial link to an adjacent router. You do not have connectivity, and when you run the show running-config the output says that the serial interface is shutdown.
　　You issue the command: show interface s0
　　What will the output include?
　　A. Serial 0 is up, line protocol is down.
　　B. Serial 0 is down, line protocol is down.
　　C. Serial 0 is down, line protocol is up.
　　D. Serial is administratively down, line protocol is down.
　　E. Serial 0 is administratively down, line protocol is up.
　　F. Serial 0 is administratively up, line protocol is down.
　　Answer: B
　　
　　***the correct answer should be D***
　　I had tried it on boson router sim. Only you issued the command "shutdown" on an interface the running-config
　　would say that the interface was "shutdown". Remember that the running-config just display our setting not the real status
　　of the router! Because we had made the interface shutdown, the show interface s0 command would say that the interface was administratively
　　down!
　　
　　QUESTION NO: 145
　　You need to find out the IPX address on a Cisco 2500 series router. Which command displays all routed
　　protocols and the interfaces on which the protocol is enabled?
　　A. Show protocols.
　　B. Show protocol brief.
　　C. Show interfaces protocol.
　　D. Show interfaces.
　　E. Show routed.
　　F. Show routed interfaces.
　　Answer: D
　　***the correct answer should be A***
　　the "show interfaces" command outputs ip protocol only!
　　Besides, the “show IPX interface” is also at work.
　　
　　QUESTION NO: 202
　　You are configuring R3 so that it can communicate with R2 on Ethernet port e1. What encapsulation should you use on s0 to setup this IPX network?
　　A. SAP
　　B. HDLC
　　C. ARPA
　　D. Novell-Ether
　　Answer: D
　　Explanation: In order for both routers to communicate they must be using the same type of encapsulation.
　　Therefore e1 of router R3 must have novell-ether encapsulation.
　　
　　***the answer is correct but the question should be:
　　You are configuring R3 so that it can communicate with R2 on Ethernet port e1. What encapsulation should you use on e1 to setup this IPX network?
　　
　　
　　QUESTION NO: 274
　　What are two commands that you can use to view your access lists? (Choose two)
　　A. Show filters.
　　B. Show access-lists.
　　C. Show IP access-list.
　　D. Show running-Config.
　　Answer: B, C
　　***the correct answer should be B,D***
　　The command "show running-config" do output the contents of all access-lists, on the other hand the "show ip access-list" command
　　can not output the ipx access-list!
　　It is too bad I could not issue the "show ip access-list" command on boson sim software!
　　
　　
　　QUE