For questions on connecting devices together so that they can communicate with each other, as well as questions on networking equipment such as routers and switches.
Questions on networking are related to how to connect two or more devices such as computers, printers, routers, modems etc. They typically involve networking equipment like routers, switches, etc. Most computer networks are packet-switched, with the most notable implementation being the TCP/IP protocol suite used to implement most of the Internet.
Read more about computer networks on Wikipedia.