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Hikikomoritoday at 12:27 AM2 repliesview on HN

Just to add, ethernet uses csma/cd, WiFi uses csma/ca.

Upgraded our DC switches to new ones around 2014 and needed to keep a few old ones because the new ones didn't support 10Mbit half duplex.


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mikestorrenttoday at 6:02 AM

What did you still need to connect with 10mbit half duplex in 2014? I had gigabit to the desktop for a relatively small company in 2007, by 2014 10mb was pretty dead unless you had something Really Interesting connected....

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anonymousiamtoday at 1:16 AM

Thanks for the clarification. They're so close to being the same thing that I always call it CSMA/CD. Avoiding a collision is far more preferable than just detecting one.

Yeah, many enterprise switches don't even support 100Base-T or 10Base-T anymore. I've had to daisy chain an old switch that supports 100Base-T onto a modern one a few times myself. If you drop 10/100 support, you can also drop HD (simplex) support. In my junk drawer, I still have a few old 10/100 hubs (not switches), which are by definition always HD.

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