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router configurations

Discussion in 'Routing & Switching' started by p1xels, Jul 13, 2013.

  1. p1xels

    p1xels Bit Poster

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    Refer to the exhibit below.


    Router#show running-config
    Building configuration


    Current configuration :59 bytes

    <output omitted>


    interface Serial0/0/0
    ip address 209.165.200.225 255.255.255.224
    !

    Based only on the command output, what is true about interface Serial 0/0/0?

    A. A ping to the remote address 209.165.200.226 will be successful.

    B. The configuration is incomplete, which will cause the interface status to be “Serial0/0/0 is down,
    line protocol is down“.

    C. The configuration is incomplete, which will cause the interface status to be “Serial0/0/0 is up,
    line protocol is down".

    D. The interface is using Cisco HDLC for the Layer 2 encapsulation.

    I cant decide the answer but still i feel that it should be option "A".
    Please do correct me if am wrong.
     
    Last edited: Jul 14, 2013
  2. Cunningfox

    Cunningfox Byte Poster

    219
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    Rather than just give you the answer, why do you believe A is correct? :)
     
    Certifications: CCNP, CCNA, MCP
    WIP: ??
  3. p1xels

    p1xels Bit Poster

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    I felt A is correct or it may be B as well.
    1)I feel A as 209.165.200.226 seems to be in the same subnet as 209.165.200.225.So it can ping.
    2)C can also be correct because there is no mention of the clock rate which is generally at the beginning of the output .
    It is not mentioned whether HDLC or PPP is active in that line.
    So how can someone guess whether it is HDLC or PPP encapsulation in that interface and which is necessary to ping HDLC or PPP?
     
    Last edited: Jul 14, 2013
  4. Cunningfox

    Cunningfox Byte Poster

    219
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    Sometimes on Cisco tests there may be multiple correct answers or certainly multiple answers that 'could' be correct. However, based on the limited information you have available only 1 is actually correct.

    You can not guess the configuration on the other end, you have to limit yourself to the information given in the question. Where a command is not given in the configuration, what does it default to?

    What happens to an serial interface that you simply configure with an IP address and no shut it? Does it require other configuration to be usable, whats there by default?
     
    Certifications: CCNP, CCNA, MCP
    WIP: ??

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