Computer Network Basics

1. NETWORK
Data Communication and Computer Network
Mahesh Sharma, Computer Facilitator Ritamvara School

2. Introduction
Communication: Sending and Receiving of
data and information through electronic
medium
Telecommunication: Electronic medium such
as Telephones, Radio, Television are used.
Data Communication: Electronic medium such
as Computers, Laptops are used.

3. Components of Data
Communication
Data or Information
Sender
Medium
Receiver
Protocol

4. Computer Network
(C.N.)
Definition: Physical Interconnection between
two or more computers.
In other words: Group of Interconnected
computers through transmission media in
order to share resources

5. Components of Computer
Network
Hardware Component and Software component
 Server
 Clients
 Network Adapter
 Cable connector
 Communication Media
 Network operating Device
 Network Connecting device

6. Hardware components of
C.N.
Server – Service Providing Computer
 Client – Service Receiving Computer
 Network Adapter – Interface in computer
network
 Communication Media – Twisted Cable, Co-
axial Cables, WIFI, Satellite etc.
 Cable Connectors: RJ 45, BNC ST,
Connectors etc.
 Network Connecting Device: MODEM, Router,
Switch, Hub.

7. Software components of
C.N.
Software Components:
Network Operating System(NOS): Example-
Linux OS, Unix OS, etc.
Network Protocols: Set of instructions or rules
for connecting to internet.
Example: TCP/IP, FTP, HTTP, SMTP, POP are
some popular common protocols in computer
network.

8. Advantages and Disadvantages
of Computer Network
 It allows exchanging
data and information
between users
 Communication is
easy and fast
 Sharing of Hardware
and other resources
 Easy for backup of
data
 Expensive for
connection of
computers
 Not safe from
hackers and
crackers
 Requires special
technical knowledge
and skills to operate
Advantages of Computer Network
Disadvantages of Computer
Network

9. Any Questions???