How to connect 4 computer together

[Guest]

a customer need diagram ad advise on how to connect 4 computer working together

 

[hang-the-9]

Need more info here, what type of infrastructure are you talking about? Do the PCs need an internet connection, what's the budget, locations of the computers, strong security needed or not, etc..

Basic way, get a Router, wire the computers to the router, will get a DHCP server and internet connections from the Router.