What is a Computer

What is a Computer ?
• Computer works with 0’s & 1’s
– Super Computer
– Mainframe
– Macro computer
– Micro computer
Block diagram of computer
Different types of network
 LAN
MAN
WAN
Basic requirements to form a network
1.NIC
2.Media
Guided media
Unguided media

• Computer is an electronic device that process the input and gives you the desired output

• It also stores data for further processing

• Types of computer

Local Area Networks are used to connect networking devices that are

in a very close geographic area such as a floor of a building, a building

itself or within a campus.

Metropolitan Area Network are used to connect networking devices

that may span around the entire city.

Wide Area Networks which connects two or more LANs present at

different geographical locations.

NIC is a computer hardware component designed to allow computers

to communicate over a network.

The purpose of the media is to transport bits from one machine to

another.

Waves are guided along the solid medium.

E.g. UTP(Unshielded Twisted Pair), Coaxial cable and fiber optics

Unguided media is data signals that flow through the air . They are

not guided or bounded to a channel to flow.

E.g. RF waves , Infrared waves etc