CCNA Sample Questions

640-801

36. What is the maximum number of hops that OSPF allows before marking a network as unreachable?
    1. 15
    2. 16
    3. 255
    4. Unlimited
    5. 99

    Answer :D

37. Which routing protocol would allow a network administrator scalability, VLSM support and minimize overhead if the network administrator wants to merge different networks all using routers from multiple vendors?
    1. VTP
    2. RIP
    3. IGRP
    4. EIGRP
    5. OSPF

    Answer :E

38. Two routers Rtr1 and Rtr2 are both configured with RIP only. What will be the result when Rtr1 receives a routing update that contains a higher cost path to a network already in its routing table?
    1. The update information will replace the existing routing table entry.
    2. The update information will be added to the existing routing table.
    3. The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence.
    4. The update will be ignored and no further action will be taken.

    Answer :E

39. The following exhibit shows the Braindumps.biz WAN. Study it carefully:
    

    What are the broadcast addresses of the subnets in the Braindumps network? (Select three options).
    A. 172.16.82.255
    B. 172.16.95.255
    C. 172.16.64.255
    D. 172.16.32.255
    E. 172.16.47.255
    F. 172.16.79.255

    Answer :B, E, F

    Explanation:The subnets in the network are subnetted Class B addresses. A /20 subnet mask means that the subnet addresses increment by 16.

    For example: 172.16.16.0, 172.16.32.0, 172.16.48.0, 172.16.64.0 etc. The broadcast address is the last IP address before the next subnet address.
    B: The switch IP address (172.16.82.90) is in the 172.16.80.0 subnet. 172.16.95.255 is the broadcast address for the 172.16.80.0 subnet.
    E: 172.16.47.255 is the broadcast address for the 172.16.32.0 subnet.
    F: 172.16.79.255 is the broadcast address for the 172.16.64.0 subnet.

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

    Routers Braindumps1 and Braindumps2 are connected through their social interfaces, however, they cannot communicate. You ascertain that Braindumps1 has the correct configuration.

    Can you identify the fault on router Braindumps2?

    1. Link reliability is insufficient
    2. IPCP is not open
    3. Incorrect subnet mask
    4. Incompatible encapsulation
    5. Bandwidth allocation is too low
    6. Incomplete IP address

    Answer :D

    Explanation :HDLC and PPP Configuration
    HDLC and PPP configuration is straightforward. You just need to be sure to configure the same WAN data-link protocol on each end of the serial link. Otherwise, the routers will misinterpret the incoming frames, because each WAN data-link protocol uses a different frame format. Other than configuring some optional features that are all you need to do.