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1. NETWORKS

2. Learning Objectives
In this presentation you will learn:
What are Computer Networks?
Types of Networks
Computer Architecture

3. Networks
A computer network is a digital telecommunications
network which allows nodes to share resources. In
computer networks, computing devices exchange
data with each other using connections between
nodes. These data links are established over cable
media such as wires or optic cables, or wireless
media such as Wi-Fi.

5. Types of Networks

6.  LAN (Local Area Networks)
It is also called LAN and designed for small
physical areas such as an office, group of buildings
or a factory. LANs are used widely as it is easy to
design and to troubleshoot.
 MAN (Metropolitan Area Networks)
It is basically a bigger version of LAN. It is also
called MAN and uses the similar technology as
LAN. It is designed to extend over the entire city.

7.  WAN (Wide Area Networks)
WAN can be private or can be leased public
network. It is used for the network that covers
large distance such as cover states of a country. It
is not easy to design and maintain.
 Wireless
Digital wireless communication is not a new idea.
Earlier, Morse Code was used to implement
wireless networks. Modern digital wireless systems
have better performance, but the basic idea is the
same.

8.  Internet (Inter Network)
Inter Network or Internet is a combination of two
or more networks. Inter network can be formed by
joining two or more individual networks by means
of various devices such as routers, gateways and
bridges.

9. ReceiverDestination
Transmission
System
TransmitterSource
Computer Architecture

10.  Source
Sources are objects which encode message data and
transmit the information, via a channel, to one or
more observers (or receivers).
Transmitter
A transmitter is an electronic device used in
telecommunications to produce a radio waves in
order to transmit or send data with the aid of an
antenna.

11. Transmission System
In telecommunications, a transmission system is a
system that transmits a signal from one place to
another.
Receiver
The individual (or the group of individuals) who
responds to the sender is called the receiver.

12. Destination
Many computer commands move data from one
file to another or from one storage device to
another. This is referred to as moving the data
from the source to the destination.