CCNA Sample Questions

640-801

51. You are a network administrator at Braindumps. The Braindumps network is illustrated in the following exhibit. Study it carefully:
    

    You want to prevent users on the Research Network and the Internet from accessing the Braindumps Support server, but you want to allow all other Braindumps users access to the server. You create an access control list (ACL) called research block. The ACL contains the following statements:

    deny 172.16.102.0 0.0.0.255 172.16.104.255 0.0.0.0
    permit 172.16.0.0 0.0.255.255 172.16.104.252 0.0.0.0

    Which of the following commands sequences will place this list to meet these requirements?

    1. Brain dump1 (config)# interface e0
       Brain dump1 (config-if)# ip access-group research block in
    2. Brain dump1 (config)# interface s0
       Brain dump1 (config-if)# ip access-group research block out
    3. Brain dump2 (config)# interface s0
       Brain dump2 (config-if)# ip access-group research block out
    4. Brain dump2 (config)# interface s1
       Brain dump2 (config-if)# ip access-group research block in
    5. Brain dump3 (config)# interface s1
       Brain dump3 (config-if)# ip access-group research block in
    6. Brain dump3 (config)# interface e0
       Brain dump3 (config-if)# ip access-group research block out

    Answer :F

    Explanation:To enable the ACL on an interface and define the direction of packets to which the ACL is applied, the ip access-group command is used.
    When referring to a router, these terms have the following meanings.

    • Out - Traffic that has already been through the router and is leaving the interface; the source Would be where it's been (on the other side of the router) and the destination is where it's Going.
    • In - Traffic that is arriving on the interface and which will go through the router; the source would Be where it's been and the destination is where it's going (on the other side of the router).
52. You are a network administrator at Braindumps. You are troubleshooting a router problem. You issue the show ip route command on one of the routers. The output from the command is shown in the following exhibit:
    Router Brain dump# Show in ip route.
    What does [120/3] represent?
    1. 120 is the bandwidth allocation and 3 is the routing process number.
    2. 120 is the administrative distance and 3 is the metric for that route.
    3. 120 is the value of the update timer and 3 is the number of updates received.
    4. 120 is the UDP port for forwarding traffic and 3 is the number of bridges.

    Answer :B

    Explanation:To decide which route to use, IOS uses a concept called Administrative Distance. Administrativedistance is a number that denotes how believable an entire routing protocol is on a single router. The lower the number, the better, or more believable the routing protocol.
    Route Type Administrative Distance
    Route Type Administrative Distance

    • Connected 0
    • EIGRP 90
    • IGRP 100
    • OSPF 110
    • RIP 120