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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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.
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.