BPuhl’s Blog

A little bit of everything without actually being much of anything

Gigabit cross-over cable

Posted by BPuhl on July 27, 2008

Was talking with Dean this evening, and we wanted to swap a bunch of files around.  “Bunch” being multiple GB.  Started off all well and good over the wireless network, but we were still lacking something…ahh..that’s what it was:  “Throughput”

Since both his laptop and mine have gigabit ports, we decided to cable them together to get a little more “transfer” into the “file transfer” process. 

Fortunately I decided to think out loud when I said, “Sure, I think I have a cross-over cable”…because that gave him the opportunity to say, “Gigabit is smarter than that, you don’t need a cross-over cable anymore, it will automagically figure it out” – to which I appropriately responded: “Huh? What?”

So yeah – turns out that you don’t need cross-over cables anymore, gigabit network ports will automagically figure it out, and (according to Dean) they will even figure it out when you have gigabit on one side and 10/100 on the other side.  This obviously explains the long line of cross-over cables outside the unemployment office.

(for all of you who are thinking to yourselves, “yeah, duh! You mean you didn’t know that already?” – No, I didn’t)

I’m starting to enjoy this 21st century thing though

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3 Responses to “Gigabit cross-over cable”

  1. Laura said

    *raises hand* I’ll admit it, I didn’t know that either. 🙂

  2. IIRC it has something to do with gig using all 4 pairs whereas 100TX actually only uses 2 pairs.

  3. BPuhl said

    Yeah, that’s what Dean said too…but really, who believes him?

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