G
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Archived from groups: comp.dcom.lans.ethernet (More info?)
First off, I'm not a network person, I'm just taking a course, but my
background is wireless communications, so I'm more famliar with Aloha
than Ethernet.
At any rate, I'm having a debate with someone over the behaviour of
the contention algorithm and I'm wondering if anyone has a way to
break the tie (with some balck and white proof).
Question:
Take a 4 users network (A,B,C and D). A and B send and collide, they
then sit back and wait for their timers to go off to try again. C and
D then send and collide, they too set their timers and wait to try
again.
Point of Contention:
Do both A and B detect the collision of C and D, and if so, are they
then forced to reset their timers?
My view point is No, and here are my reasoning. Technically I think
they could detect the collision of C and D, but if this is the case,
then why do transmitters need the loopback of the Tx signal to the Rx
to compare what's Rx's if anyone (i.e. A or B) can detect the
collision?
Any literature I've found so far only deals with the transmitter and
receiver, none specifically detail the requirements of the passive
terminal. Another reason why I don't think this is the case as I
would expect it explicitly written that ALL terminals must reset their
timers.
Thanks,
Darren
First off, I'm not a network person, I'm just taking a course, but my
background is wireless communications, so I'm more famliar with Aloha
than Ethernet.
At any rate, I'm having a debate with someone over the behaviour of
the contention algorithm and I'm wondering if anyone has a way to
break the tie (with some balck and white proof).
Question:
Take a 4 users network (A,B,C and D). A and B send and collide, they
then sit back and wait for their timers to go off to try again. C and
D then send and collide, they too set their timers and wait to try
again.
Point of Contention:
Do both A and B detect the collision of C and D, and if so, are they
then forced to reset their timers?
My view point is No, and here are my reasoning. Technically I think
they could detect the collision of C and D, but if this is the case,
then why do transmitters need the loopback of the Tx signal to the Rx
to compare what's Rx's if anyone (i.e. A or B) can detect the
collision?
Any literature I've found so far only deals with the transmitter and
receiver, none specifically detail the requirements of the passive
terminal. Another reason why I don't think this is the case as I
would expect it explicitly written that ALL terminals must reset their
timers.
Thanks,
Darren