Why does a wired network slow down with user increase?

Posted by Ed Briscoe on Server Fault See other posts from Server Fault or by Ed Briscoe
Published on 2012-04-15T00:52:19Z Indexed on 2012/04/15 5:34 UTC
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networking

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switch

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bandwidth

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Wired

If you had a wired network, 20 PCs hooked up to a 100 Mbit/sec switch (same onboard ethernet port speed) and you were just sending some test data round. What is the technical explanation as to why 20 machines sending test data around this network to each other is slower than one to one?

I mean I know a busy network means it's slower but I'm really trying to understand some more technical details.

Thanks for any help

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