Talk:Carrier-sense multiple access with collision detection

	This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing
???	This article has not yet received a rating on Wikipedia's content assessment scale.
???	This article has not yet received a rating on the project's importance scale.

The Jam signal is used in CSMA/CA and not in CSMA/CD

I don't know if this is true or not but the article says it IS used in CSMA/CD at the top and then contradicts it.. —Preceding unsigned comment added by Pyxs (talk • contribs) 14:45, 29 August 2009 (UTC)[reply]

Nodes must continue to transmit *something* for the minimum packet time after detecting a collision, WHAT they transmit (more of the packet data or an explicit jam signal) doesn't matter to the algorithm.

Repeaters must also be able to repeat a collision so that all nodes in the network see it. Plugwash (talk) 10:36, 28 September 2011 (UTC)[reply]

NO ITS NOT, this is false information

After "a carrier sensing scheme is used" someone put "NO ITS NOT, this is false information". I don't know whether it's true or not, but this isn't the right way to inform readers. —Preceding unsigned comment added by 82.49.187.14 (talk) 15:01, 25 June 2008 (UTC)[reply]

how to reduce collision

references

the references section needs some cleanup, it doesn't fit wiki standards.

Stdazi 15:18, 6 April 2007 (UTC)[reply]

Collision detection is not done by CRC

The article implies that collision detection is based on CRC. This is incorrect. It is an analog process -- the transceiver monitors the wire while it is sending, and if it detects a signal on the wire that differs from what it sent (because another transceiver is also contributing) that is a collision.

Collision detection is a physical layer function. CRC handling is a MAC layer function. The two are not connected.

Paul Koning 20:35, 16 April 2007 (UTC)[reply]

Throughput

Some books on networking have curves in which one can see the maximum throughput of 0.1-persistent CSMA, 0.01-persistent CSMA, ALOHA etc. in comparison on a single chart. Such a chart is extremely helpful to understand the performance of the different multiple access methodss. Subwy (talk) 15:32, 21 July 2008 (UTC)[reply]

No longer utilize

The article asserts "Modern Ethernet networks ... no longer utilize CSMA/CD". That is true in the sense that collisions will not normally occur (because there is one device per port), but surely all switches still have collision detection on each port? A recent edit (diff) could be read as suggesting that CD is no longer implemented and I'm pretty sure the section needs to be rewritten. Thoughts? Johnuniq (talk) 22:48, 12 November 2010 (UTC)[reply]

Supporting something and using it aren't the same thing. Modern ethernet gear supports CSMA/CD because it's needed for interoperability with legacy equipment but in a network built out modern gear it won't be used as the links will be running in full duplex mode (where collisions can't happen). Plugwash (talk) 17:07, 29 July 2011 (UTC)[reply]