1

Ethernet link

Hi, I need some expert networking advise here. I have to connect two different PC together via a unique ethernet path. Please see attach picture. I however cannot go thru a switch or a hub.

**my setup requires using external USB to Ethernet converters on both sides of the PC.

My question for the experts is.. The two PCs can only ping successfully when I use a regular Ethernet cable (straight-thru, i believe its known as T568A). I have always thought this PC to PC Ethernet link will require a T568B crossover cable instead.

This puzzled me. Can somebody confirm this is actually indeed what it should be, and help me understand how this works?

Improve this question
3
  • 2
    If it works with a straight-through cable, it's hard to argue that that's wrong ;-p
    – Ron Trunk
    Dec 6, 2017 at 15:48
  • It's working with your conventional straight through cable because one or both of your USB ethernet adapters are "Auto MDI". You lucked out. en.wikipedia.org/wiki/Medium-dependent_interface#Auto_MDI-X
    – 123456789123456789123456789
    Dec 6, 2017 at 17:36
  • Hi, if the USB-Ethernet adapter supports Auto MDI, then shouldn't both straightthru and crossover cable work?
    – Faisal
    Dec 6, 2017 at 23:40

1 Answer 1

Reset to default
3

With modern equipment, you can use a straight-through or crossover cable. Most equipment can detect and configure a crossover in the interface, if needed.

You seem to be confused about the cabling standards. Both T568A and T568B are straight-through if you use the same standard on both ends. It is only a crossover if you use T568A on one end, and T568B on the other end.

Improve this answer
1
  • Thanks, this is good info. Will try today if a direct PC-PC connection with straightthru works..(not via the USB-Ethernet adapter)
    – Faisal
    Dec 6, 2017 at 23:41

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.