Every computer can also be used as a stand-alone system. This differs from client-server architectures, in which some computers are dedicated to serving the others. Users are all located in the same general area and control individual shared resources. Users want to share files and a printer. Data security is not a major concern.
Users act as their own administrators and plan their own security.
No dedicated server is necessary and no additional computers or software are required. Network Interface Card for each computer. Cabling for each computer. A network hub. This is a central interface to which you connect all the network computers, with enough ports to connect all of your computers.