Network + question from my college mid term

Hello:

i am taking a mid-term exam at UM in college park,
(take home exam) I have answered my questions but want
to get outside opinions on my answers...No-one in thew
class wants to do a study group.
Question 1:
You are troubleshooting a communications problem on your
company's 10Base-T Ethernet internetwork that consists of
five segments, all connected to a backbone network.
Mark, a user on one of the segments, can connect to
computers on the same segment but not to computers on any
other segments. No other users have reported problems.
Which one of the following could be the problem?

a. A network layer problem on the backbone network
b. A physical layer problem on Mark's segment
c. A network layer problem on Mark's segment
d. A physical layer problem on the backbone

I chose "A" because, there could be an open cable on the
cable connecting Mark's segment to the backbone.

I do not believe there is a network layer problem on
Mark's segment due to the fact he can connect to the
other computers on his segment so his nic card must work,

But I am in doubt of my answer because, I thought that he
could have a network layer problem, as Mark's computer
only gets up to the data link layer in the OSI, if he
communicates on his segment. Do physical problems only
mean none working nic cards? I am confused as to correct
answer. The backbone router could have a physical
problem Corrct?
help please

stuart J.

Read the Following

· The Network layer addresses messages and translates logical addresses and
names into physical addresses. It also determines the route from the source
to the destination computer and manages traffic problems, such as switching,
routing, and controlling the congestion of data packets.

The question sounds like there is a problem with the IP routing from that
segment of the network. The answer is the Network Layer since the Network
layer is where routing takes place.

If it where a physical Layer problem mark could not get to other computers
on his segment.

It is not a problem with the backbone since no other users have complained
of problems

--
Rick

Rick

for me the "No other users have reported problems" indicates it's something
on marks segment. but it's a very sloppyly worded question.

i would say network layer on marks segment.

for me physical indicates nic's cables e.t.c.. if it was that, mark wouldn't
be able to conect to hosts on his segment either.

but mark can connect to hosts on his side of the router but not on the
other. so there is a routing issue. mark's gateway would be the router end
on his side. to fix it you would add a static route on marks router end to
point to the route he can't connect to.

"stuart J." <> wrote in message
news:039001c38f26$2fce8a20$...
> Hello:
>
> i am taking a mid-term exam at UM in college park,
> (take home exam) I have answered my questions but want
> to get outside opinions on my answers...No-one in thew
> class wants to do a study group.
> Question 1:
> You are troubleshooting a communications problem on your
> company's 10Base-T Ethernet internetwork that consists of
> five segments, all connected to a backbone network.
> Mark, a user on one of the segments, can connect to
> computers on the same segment but not to computers on any
> other segments. No other users have reported problems.
> Which one of the following could be the problem?
>
> a. A network layer problem on the backbone network
> b. A physical layer problem on Mark's segment
> c. A network layer problem on Mark's segment
> d. A physical layer problem on the backbone
>
> I chose "A" because, there could be an open cable on the
> cable connecting Mark's segment to the backbone.
>
> I do not believe there is a network layer problem on
> Mark's segment due to the fact he can connect to the
> other computers on his segment so his nic card must work,
>
> But I am in doubt of my answer because, I thought that he
> could have a network layer problem, as Mark's computer
> only gets up to the data link layer in the OSI, if he
> communicates on his segment. Do physical problems only
> mean none working nic cards? I am confused as to correct
> answer. The backbone router could have a physical
> problem Corrct?
> help please
>

JJ Gitties