Computer networks are established in an office set up to facilitate the sharing of data and information between users. A good network is a key to running day to day operations in a company. It should be reliable and secure.
For you to share files between users, access web applications, access websites, or any software that is connected to a server and used by multiple users. You need a network. It can either be LAN(Local Area Network) or WAN(Wide Area Network).
A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus, or office building.
WAN(Wide Area Network) spans a large physical distance. The Internet is the largest WAN, spanning the Earth.
A WAN is a geographically-dispersed collection of LANs. A network device called a router connects LANs to a WAN. In IP networking, the router maintains both a LAN address and a WAN address.