In this presentation , I have discussed about various communication channels used in the computer networks.

1. Lakshya institute
of technology
and management
Student name = Ankita kaurav
From = pgdca

2. Table of Content
 Introduction
 Data Communication process
 Data Component of communication
 Data Communication types
 Data Communication channels
2

3. INTRODUCTION OF
DATA COMMUNICATION
3

4. DATA COMMUNICATION
Data communication is the process of
using computing and communication
technologies to transfer data from one
place to another, or between
participating parties.
4

5. Data communication process
• Data communication is defined as exchange of data between
two devices.
• Tranmission media such as
• a cable, wire or it can be air or vaccum also.
• Combination of hardware or software devices and programs.
5

6. Component of communication
o Message
o Sender
o Receiver
o Transmission medium
o Protocol
6

7. TYPES OF COMMUNICATION
Simplex communication
Half duplex communication
Full duplex communication
7

8. Communication channels
GUIDED/WIRED
MEDIA
UNGUIDED/
WIRELESS MEDIA
TWISTED
PAIR
CO-AXIAL
CABLE
OPTICAL
FIBER
RADIO
WAVES
MICRO
WAVES
INFRARED
WAVES
SHIELDED UNSHIELDED
8

9. Guided/wired media
Twisted pair
Co-axial cable
Optical fiber
9

10. Twisted pair cable
• A twisted pair is the ordinary copper
wire that connects home and business
computers to the telephone company.
10

11. Types of Twisted pair
cables
Shield Unshield
11

12. Twisted pair cable
Rj 45 for
internet[LAN]
Rj 11 for
telephone
Twisted pair cable
range
10 gb per second
Maximum distance
Upto 100 meters
12

13. Co-axial
cable
Range = 500 meters
• Coaxial cable is another type
of data transmission medium.
• This outer conductor is
wrapped in a plastic cover.
• These types of cables are
used to carry signals of
higher frequencies to a
longer distance.
13

14. OPTICAL FIBRE
• The optical fiber cable carries data as
light
• Which travel inside a thin fiber of
glass.
• Such types of cable are usually used in
backbone networks.
• Signal can travel longer distances and
electromagnetic noise cannot affect
the cable
14

15. UNGUIDED/ WIRELESS
MEDIA
• Radio waves
• Microwaves
• Infrared waves
15

16. Radio waves
• Radio waves are used for
communication such as
broadcasting television and
radio.
• Radio waves are transmitted
easily through air.
• Radio waves of frequency
300KHz- 30MHz can travel
long distance.
16

17. Microwaves
 Electomagnetic waves of frequency range
1GHz – 300GHz.
 Unidirectional, can move inonly one direction
 Used in point-to- communication or unicast
communication such as radar and satellite.
 Provide very large information-carrying
capacity.
17

18. Infrared waves
• Electromagnetic waves of frequency range
300GHz- 400THz.
• Very high frequency waves.
• Used for short-distance point-to-point
communication such as mobile-to-mobile, remote-
control-to-tv, and Bluetooth-enabled devices to
other devices like mouse, keyboards etc.
18