Networking involves connecting two or more computing devices together to share data and resources. It allows for sharing of files, printers, and faster communication between linked devices. Networks can be configured using computer hardware like cables and switches, as well as software. The layout and structure of a network is represented by its topology. Key aspects of networking computers include using RJ45 cables and switches, assigning unique names to each computer but the same workgroup, and setting the IP addresses to allow sharing of files and folders between linked devices.