Two or more Computers that are able to connect and communicate with each other is called network. The Connection of these Computers is through a transmission media and a language (i.e., protocol) is required for the communication. Some advantages of networking include communication, internet access, data sharing, data security and management.
The media is either Physical or Wireless by which data transfer takes place. Physical Media includes Cables like Co-axial, Twisted-Pair and Fiber optics. Wireless Media includes Infrared, Microwave and Radio wave.
A networking protocol defines a set of rules, algorithms, messages and other mechanisms that enable software and hardware in the networked computers to communicate effectively.
- LAN ' Local Area Network:
LAN is a network within a building or campus, which the organization has its own accessories of media. The most common example of a LAN is a corporate network, like many companies and universities have installed to enable easy transfer of data.
- WAN ' Wide Area Network:
A computer network that spreads over a relatively large geographical area. Typically, a WAN consists of two or more LANs. These LANs are connected through telephone system or leased lines or satellites. The largest WAN in existence is the Internet.