network

what is network ?

A network is a group of two or more computer system linked together. Computer on the network are sometimes called as Nodes

B

basically 

 Basically there are 3 types of the computer network can be called ass
LAN( Local area network )
WAN ( Wide area network)
MAN ( Metropolitan area network)

LAN (Local area network) 

LAN’s can be either wired or wireless. Twisted pair,coax or fibre optic cable can be used in wired LAN’s.
• Every LAN uses a protocol – a set of rules that governshow packets are configured and transmitted.
• Nodes in a LAN are linked together with a certaintopology. These topologies include:
– Bus
– Ring
– Star
• LANs are capable of very high transmission rates (100sMb/s to G b/s).

MAN ( Metropolitan area network) 

A metropolitan area network (MAN) is a large computer network that usually spans a city or a

large campus

§  A MAN Is optimized for a large geographical area than LAN ranging from several block  of Building to entire cities.

A MAN  might is owned and operated by a single organization . But is usually used by  many individual and organizations 

WAN (wide area network)

 WAN covers a large geographic area such as country, continent or even whole of the world.

• A WAN is two or more LANs connected together
. The LANs can be many miles apart

• To cover great distances, WANs may transmit data over leased high-speed phone lines or

wireless links such as satellites.

. Personal Area Network (PAN)

• A PAN is a network that is used forcommunicating among computers and computer

devices (including telephones) in closeproximity of around a few meters within a room

• It can be used for communicating between thedevices themselves, or for connecting to a larger

network such as the internet.

• PAN’s can be wired or wireless