CCNA Sample Questions

640-801

36. Given the the following network diagram, assume that port 1 through 3 are assigned to VLAN 1 and ports 4 through 6 are assigned to VLAN 2 on each switch. The switches are interconnected over a trunked link.

    Which of the following conditions would verify VLAN and trunk operation? (choose 3)
    

    
    1. A. Host 1-1 can ping Host 1-2
    2. B. Host 1-1 can ping Host 4-2
    3. C. Host 1-1 can not ping Host 1-2
    4. D. Host 4-1 can not ping Host 1-2
    5. E. Host 4-1 can ping Host 4-2

    Answer :A, D, E

37. By looking at the configuration, Which additional command must be issued on the Branch router before interesting traffic will be sent to the Remote router?

    Hostname: Branch Hostname: Remote
    PH# 123-6000, 123-6001 PH# 123-8000, 123-8001
    SPID1: 32055512360001 SPID1: 32055512380001
    SPID2: 32055512360002 SPID2: 32055512380002

    isdn switch-type basic ni
    username Remote password cisco
    interface bri0
    ip address 10.1.1.1 255.255.255.0
    encapsulation ppp
    ppp authentication chap
    isdn spid1 41055512360001
    isdn spid2 41055512360002
    dialer map ip 10.1.1.2 name Remote 1238001
    dialer-list 1 protocol ip permit

    1. (config-if)# dialer-group 1
    2. (config-if)# dialer-list 1
    3. (config-if)# dialer map 1
    4. (config-if)# dialer-route 1

    Answer : A

    Explanation :The "dialer-group #" command tells the access-list (used with the dialer-list # command), which interface to activate when it finds interesting traffic. The numbers at end of each command must match.

38. You are the network administrator of the RouterSim global software 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 info:

    Local PC 190.0.3.35/24
    Default Gateway 190.0.3.1
    Remote Server 190.0.5.250/24

    You then conduct the following tests from the offending local PC: Ping 127.0.0.1 - Unsuccessful
    Ping 190.0.3.35 - Successful
    Ping 190.0.3.1 - Unsuccessful
    Ping 190.0.5.250 - Unsuccessful

    Which of the following problems would create the test results listed above?

    1. TCP/IP not correctly installed
    2. Local physical layer problem
    3. NIC not functioning
    4. Remote physical layer problem

    Answer : A

    Explanation :If you cannot ping the loopback address of 127.0.0.1, then something is wrong with the IP configuration of the host.

39. Choose three reasons why the networking industry uses a layered model. (Choose 3)
    1. Allow changes in one layer to occur without changing other layers
    2. To get Gigabit speeds on LANs
    3. Clarify what general functions is to be done rather than how to do it
    4. To create filter tables on LANs
    5. Order network troubleshooting steps

    Answer :A, C, E

    Explanation :
    The reasons to use a layer model are:

    1. Clarify what general function is to be done rather than how to do it.
    2. Reduce the complexity of networking into more manageable sublayers.
    3. Enable interoperability using standard interfaces.
    4. Allow changes in one layer to occur without changing other layers.
    5. Speed up network industry progress by allowing specialization.
    6. Allow for shortcut explanations to facilitate protocol comparisons.
    7. Order network troubleshooting steps.
    8. Facilitate systematic troubleshooting.
40. What is a disadvantage to using bridges in your network?
    1. Filters by MAC address
    2. Stops broadcast storms
    3. Doesn't stop broadcast storms
    4. Can only use up to 4 bridges in any LAN

    Answer : C

    Explanation :
    Even though the 5-4-3 rule specifies you can only have 4 bridges in a network, that is not really a disadvantage. The disadvantage to bridging is that it filters by MAC address and cannot create separate networks like a router can. This means that if a broadcast storm was to take place a bridge will forward the frames.