Is the file sharing of two PCs, connected with a crossover cable, both directions or only one?

Would I be able to connect to a PC and play LAN games over this mini-network?

Would this be extremely fast?

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2 Answers 2


Most of the modern NICs (network interface cards) do not require a crossover Ethernet cable. You can connect them with a straight-through cable and the NIC will flip one of the ends into crossover (the technology is called Auto-MDIX).

Back in the early days this was a requirement when you wanted to connect two computers to use a crossover cable but since NICs evolved with this technology, it is no longer a requirement.

And yes, you will be able to play LAN or exchange files between these two computers.

It will be fast enough to play - 100Mbps or 1Gbps (depends on your NIC).

I hope this helps.


  • Does this apply to PCIe network cards or also motherboard ethernet ports. And can you maybe tell me or make a approximation of which year the ports are from and would have these features. Commented Feb 26, 2016 at 19:13
  • @Jeroentetje3 books.google.com/ngrams/… gives you a good idea of when it arrived as a technology
    – Baldrickk
    Commented Feb 22, 2018 at 10:54

Both directions, yes, and yes.

If it's gigabit capable then it will auto mdx (no crossover cable necessary) if it's only 100 mb then you're better off using a crossover cable, but you can check for auto mdx somewhere in the settings for you network adapter, Linux it's just ethtool I think.

Seen people get a 40 gbit point to point connecting going, it's beautiful.

  • Does only one of the 2 connected pc's need an auto-MDX? Commented Feb 28, 2016 at 8:07
  • Yes, the Auto-MDX feature works if it is available on one or on two neighbouring interfaces.
    – vk5tu
    Commented Aug 1, 2017 at 17:41

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