CCNA Sample Questions

640-801

53. You are a systems administrator at Braindumps and you've just acquired a new Class C IP network. Which of one of the subnet masks below is capable of providing one useful subnet for each of the above departments (support, financial, sales & development) while still allowing enough usable host addresses for each departments needs?
    
    1. 255.255.255.128
    2. 255.255.255.192
    3. 255.255.255.224
    4. 255.255.255.240
    5. 255.255.255.248
    6. 255.255.255.252

    Answer :C

    Explanation:The network currently consists of 5 networks and another network will be acquired. That gives us atotal of 6 networks. This requires that we use 3 bits for the network address. Using the formula 2n-2 we get 6. This also leaves us with 5 bits for hosts, which gives us 30 hosts.

54. You are a network administrator at Braindumps. You need to troubleshoot the Braindumps network shown in the exhibit. Study the Exhibit carefully:
    

    The host, EX1, is connected to the Braindumps1 LAN, but it cannot get access to resources on any ofthe other networks. The host's configuration is as follows:

    Host address: 192.168.5.45
    Subnet mask: 255.255.255.240
    Default gateway: 192.168.5.32
    Which of the following is the cause of this problem?

    1. The default gateway is a subnetwork address.
    2. The default gateway is on a different subnet address as the host.
    3. The IP address of the host is on a different subnet.
    4. The host subnet mask is incompatible to the subnet mask of the attached router interface.

    Answer :A

    Explanation:The range of the subnet used in this question is 192.168.166.32 to 192.168.166.47.192.168.166.32 is the network address and 192.168.166.47 is the broadcast. This leaving a usable host address range of 192.168.166.33 to 192.168.166.46.
    The default gateway for the host should be 192.168.166.33.

55. Which of the following are benefits of segmenting a network with a router? (Select all that apply)
    1. Broadcasts are not forwarded across the router.
    2. All broadcasts are completely eliminated.
    3. Adding a router to the network decreases latency.
    4. Filtering can occur based on Layer 3 information.
    5. Routers are more efficient than switches and will process the data more quickly.
    6. None of the above.

    Answer :A, D