When you use computers, entertainment systems or telephones, the various pieces and parts of the systems make up a community of electronic devices. These devices communicate with each other using a variety of wires, cables, radio signals and infrared light beams, and an even greater variety of connctors, plugs and protocols. There are lots of different ways that electronic devices can connect to one another. For example:
Component cables Electrical wires Ethernet cables When any two devices need to talk to each other, they have to agree on a number of points before the conversation can begin. source
