2. What Is Network??
Network is a group of devices linked to one
another. For example – network of radio
,cable network.
3. Need For
Networking :-
•It breaks the barrier of
distance , cost and time .
•It is very cost
effective .
•All types of data viz. text ,
audio can be transmitted
through it.
5. Networking
Transmission Media
Guided Media Unguided Media
It uses a cabling system
that guides the data
signals along a specific
path .These are bounded
by cabling system.
It consist of a means for
the data signals to travel
but nothing to guide them
along a specific path .
6. Twisted Pair
Cable
The most common
form of wiring in
data communication
application is the
twisted pair cable .
In twisted pair cable
, wires are twisted
together in pairs.
Coaxial Cable
It is the wire
which is least
used. It has high
electrical
properties and is
suitable for high
speed
communication. It
is used mostly in
television signals.
Optical Fibre
It consists of
thin glass fibres
that can carry
information at
frequencies in
the visible light
spectrum and
beyond. It is the
fastest and
expensive wire.
7.
8. Unguided Media
Short Distance Wireless
Media
Long distance
Wireless Media
Infrared
Laser
Bluetooth
Wi – fi
Microwave
Radio
Wave
Satellite
10. Types Of Networks :-
•Local Area Network (LAN) – Small computer networks
that are confined to a localized area are known as local area
network. For e.g. – an office , a building etc . It’s main
purpose is to serve its users in resource sharing.
•Metropolitan Area Network (MAN ) – These are the
networks which spread over the city . For e.g. – cable TV
networks that are spread over a city.
•Wide Area Network (WAN) – The networks spread across
countries are known as WAN’S . Wide area network is a
group of computers that are separated by large distances
and tied together.
14. •It is a client server software
that allows multiple users to
communicate online with real
time audio , video and text
chat in dynamic 3D
environments.
