connectivity question - CCNA

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dear greater cisco intellect,

i've been doin' some practice exams,  and am havin' problems
understanding the answer to one of them:

A user on your network indicated that he/she cannot reach a remote
site.  Following info: is given:

local PC 10.0.4.36/24
default gateway 10.0.4.1
remote server 10.0.6.251/24

from the remote site, the following was done:

ping 127.0.0.1 - unsuccessful
ping 10.0.4.36 - unsuccessful
ping 10.0.4.1 - unsuccessful
ping 10.0.6.251 - unsuccessful

so the what's the problem?

well the answer says that tcp/ip in not installed.  and that's the
reason.  but i'm thinkin' it's because the remote physical layer is at
fault.  i mean if you try to ping the nic card (127.0.0.1) and are
unsuccessful...wouldn't that mean the the nic card is not workin'.  and
therefore, we have a physical layer problem?

just wonderin' if i could get some insight on this one.

regards,

mgodinez
seattle, wa

partly cloudy...


Re: connectivity question - CCNA
You know that the NIC is installed, because it has an IP address --
10.0.6.251/24

If troubleshooting, and you get no response when Pinging 127.0.0.1,
there is a problem with TCP/IP services.  127.0.0.1 is a loopback
address and should never go down.  The solution would be to reinstall
or reinitialize the TCP/IP stack.

It could be possible that the NIC was unintstalled or unseated.  There
are a number of reasons why the TCP/IP services could stop working, one
of which is a bad NIC, but that goes beyond the scope of the question.
BTW, there are other network services protocols besides TCP/IP... you
could have a IPX/SPX or AppleTalk, or CLNS without TCP/IP.  The
physical layer could be working fine with another protocol and still
not work with TCP/IP.


Re: connectivity question - CCNA
bkvalent,

thank you so so much for the response.  i see the err of my ways now.

good stuff!!!

regards,

mgodinez
seattle, wa

cloudy...


Re: connectivity question - CCNA

michael.godinez@gmail.com wrote:
Quoted text here. Click to load it

127.0.0.1 is logical, doesn't touch the NIC


Re: connectivity question - CCNA

Quoted text here. Click to load it

Cisco wants you to test connectivity doing the following four steps:

Ping local loopback address (127.0.0.1) : If failes the TCP/IP stack is a
problem.
Ping your own local PC address : If failes the NIC is bad or no cable
connected to it.
Ping your default gateway : If failes the local router is a problem.
Ping remote host : If failes you have a "remote" problem.



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