Question

what is a computer network and why it is useful? differentiate between various of network

Answer 1

a network allow sharing of network and computing resources.Users may access and use resources provided by devices on the network,such as printing a document on a shared network printer or use of a shared network device.

LAN:local area network as the name suggest it covers a local area . This usually include a local office.

WAN:wide area lan it covers wider area than lan.WANcan be wired or wireless.

PAN:personal area netework;a network covering a very small area like a room

MAN:meteropolitan area networkconnects node located in the same metro area.

Answer 2

Computer network is a link between two or more computers with wires or wireless medium to share hardware resources, software resources and communicate each other.

It is very useful because it allows sharing of software packages and data files.