How to copy and emulate computer characteristics?

Question

linux

There is an internal LAN network. To have access, it is not enough just to plug in an Ethernet cable, because. it checks the characteristics of the computer. Which ones I don't know. I have a computer with these characteristics at hand.
The question is how to create a snapshot of system characteristics? And most importantly: how to use this cast?
Possibly 802.1X. How to get around?

Answer 1

learn networks....
mac address, 802.1x authorization.
There are no other ways to restrict access to the network especially....