these slides contain information about data communication and different media of communication

1. TOPIC
DATA COMMUNICATION
AND
COMMUNICATION MEDIA

2. DATA
Information in raw or unrecognized form(such as alphabets, numbers or
symbols) that refers to, or present, conditions, ideas or objects.
COMMUNICATION
Communication is sending and receiving information between two or
more people.
The person sending the message is reffered to a the sender.
While the person receiving the information is called receiver.

3.  The process of transferring data from one location to
another location is called data communication. In this
process data is transmitted from on location to
another by using transmission media.
DATA COMMUNICATION

4.  MESSAGE
 SENDER
 RECIEVER
 MEDIUM / COMMUNICATION CHANNEL
 ENCODER AND DECODER
BASICS COMPONENTS OF DATA
COMMUNICATION

5.  MESSAGE
The message is the data or information to be communicated . It
may consists of text, numbers ,pictures ,sounds ,video or any a
combination of these.
 SENDER
Sender is a device that sends message. The message may consists
of txt , numbers ,pictures etc. It is also called SOURCE or
TRANSMITTER. Computer is used as sender in data
communication system.
 RECEIVER
Receiver is a device that receives message. It is also called SINK.
The receiver can be computer , printer or another computer
related device. The receiver must be capable of accepting the
message.
COMPONENTS

6. MEDIUM
Medium is the physical path that connects sender and receiver. It is used
to transmit data. The medium can be a copper wire , a fiber optic cable ,
microwaves etc .
ENCODER
The encoder is a device that converts digital signal in a form that can
pass through a transmission medium.
DECODER
The decoder is a device that convert the encoded signals in to digital
form. The receiver can understand the digital form of message. Sender
and receiver cannot communicate successfully without encoder and
decoder


7.  Communication media refers to the means of delivering
and receiving data or information. In telecommunication
this means are trans mission and storage tools or channels
for data storage and transmission.
TYPES OF COMMUNICTATION
MEDIA
 Wired communication media
 Wireless communication media
COMMUNICATION MEDIA

8.  It refers to the transmission of data over a wire
based communication technology.
EXAMPLES
 It includes telephone networks, cable telecom or
internet access and fiber optic communication.
WIRED COMUNICATION MEDIA

9.  COAXIAL CABLE
 TWISTED PAIR CABLE
 FIBRE OPTIC CABLE
WIRED COMMUNICATION TYPES

10. They are used by
cable TV and is common
for data communication.
APPLICATION
Coaxial cable is used as
transmission line for radio
frequency.
CONNECTOR
It is connected with the
two.
TRANSMISSION
SPEED
Its transmission speed is 1
Giga bits per second
(gbps).
COAXIAL CABLE

11. It is a type of wiring in which
two conductors of a single
circuit are twisted together
for the purposes of
cancelling out
electromagnetic interference
from external sources.
CONNECTOR
Blue wires attach with PC’s.
APPLICATION
Used in star topology and
telephone system.
TRANSMISSION
SPEED
Its speed is 1 Giga bits per
second (1gbps) in 100 meter.
TWISTED
PAIR CABLE

12. Air technology that uses
glass threads to transmit
data. It consists of a bundle
of glass threads each of
which capable of
transmitting messages
modulated onto light
waves.
APPLICATION
Internal service provider
using this.
TRANSMISSION
SPEED
Its speed is trillion of bits
per second.
FIBER OPTIC
CABLE

13.  It is the transfer of information between two or
more points, that are not connected by electrical
conductor.
EXAMPLE
 They are used in radio, few meters for television,
including two ways radio, cellular telephones etc.
WIRELESS COMMUNICATION
MEDIA

14.  Microwaves
 Satellite
 Wi-Fi
 Bluetooth
WIRELESS COMMUNICATION
TYPES

15. Microwaves radiations has
lower frequency and longer
wave lengths than visible
light.
TRANSMISSION
SPEED
Its ranging from one meter to
one million meter with
frequencies between 300MH3
(100cm) and 300GH3 (0.1m).

16. It is an artificial satellite that relays and amplifies radio
telecommunication signals via transponder
EXAMPLE
Geostationary orbits is useful for it
Medium, Air or Vacuum
FREQUENCY
L, C, Ku, Ka
High frequency
SATELLITE

17. It is a local area wireless computing network technology
that allows electronic devices to connect to the network.
TRANSMISSION SPEED
Its speed is 2.4 gigahertz (120m)UHF and 5 gigahertz
(6cm) 20 meters
USES
Personal computers, video game consoles, smart
phones, digital camera, tablet computer and digital
audio player.
WI-FI

18. It is a wireless technology for
exchanging data and short
distance.
APPLICATION
For controls where infrared
was used.
FREQUENCY
Between 2042 and 2480 MH3
or 2400 and 2483.5 MH3 small
and large frequency.
COMMUNICATION AND
CONNECTION
It can communicate with a
maximum of seven devices
(computer network using
Bluetooth technology).