Computer Networks comprises of:

• the devices, wires etc which provide interconnectivity between computers
  
• The protocols used to exchange resources, which can take the form of web pages, audio/video files or printers, scanners, storage, processing  etc
• the applications e.g. e-mail, e-banking, e-commerce, e-governance, e-news, e-societies etc
• the programmer's interface to allow networked enabled applications i.e. Sockets API