This document presents a summary of key concepts in data communication. It discusses the components of data communication systems including messages, senders, receivers, transmission media, and communication protocols. It describes different transmission modes like simplex, half duplex, and full duplex. It also distinguishes between analog and digital signals. Finally, it outlines different types of transmission media like guided and unguided media that are used to physically transmit data between communicating devices.

1. Presentation on Data
Communication
Presented By
Bhoopendra Kumar
B.VOc Software
Development
Roll No.-20202706

2. • Introduction to data communication
• Components of data communication
• Data Flow - Simplex,Half Duplex,Full Duplex
• Signals : - Analog And Digital Signals.
• Transmission Media - Guided and unguided
Media
• References
Contents

3. Data communicationrefers to the exchange of data between a source and a receiver via form of transmission media such as a wire cable.
The purpose of Data Communications is to provide the rules and regulations that allow
computers with different disk operating systems, languages, cabling and locations to
share resources.
For data communication to occur, the communicating devices must be part of a
communication system made up of a combination of hardware and software.
The effectiveness of a data communication system depends on the three fundamental
characteristics:
• Delivery
• Accuracy
• Timeliness
What Is Data Communications ??

4. The effectiveness of data communication system depends on four fundamental
characteristics:
1. Delivery: the system must deliver data to correct destination. Data must be received
by the intended device or user.
2. Accuracy: The system must deliver the data accurately. Data that have been altered in
transmission and left uncorrected are unusable.
3. Timeliness: the system must deliver data in a timely manner. Data delivered late are
useless.
4. Jitter: jitter refers to the variation in the packet arrival time. It is the uneven delay in the
delivery of packets.
Characteristics Of DC

5. 1. Message
2. Sender
3. Receiver
4. TransmissionMedium
5. Set of rules (Protocol)
COMPONENTS OF DATA COMMUNICATION

6. Types Of
DC
There are 3 types of transmission modes : Simplex mode, Half duplex mode, and Full
duplex mode.
• Simplex
Mode:
In simplex mode, Sender can send the data but that sender
can’t receive the data. It is a unidirectional communication.

7. 2. Half Duplex Mode: In half duplex mode,Sender can send the data
and also can receive the data but one at a time. It is two-way directional communication
but one at a time.

8. 3. Full Duplex mode: In full duplex mode, Sender can send the data and also
can receive the data simultaneously. It is two-way
directional communication simultaneously.

9. SIGNA
L
There are two types of signals to transfer data

10. An analog signals are continues and passes through or include an infinite number of
continues values along its path. The curve representing the analog signals passees through
an infinite number of points.
Analog
Signals

11. DIGITAL
SIGNALS
A digital signals can have only a limited number of defined values. Although each value can
be any number,it is as simple as 1 or 0.

12. • Transmission media is a communication channel that carries the information from
the sender to the receiver. Data is transmitted through the electromagnetic
signals.
• The Main functionality of the transmission media is to carry the information in the
form of bits through LAN(Local Area Network).
• It is a physical path between transmitter and receiver in data communication.
Transmission Media

13. Classification Of Transmission Media

14. References
https://ecomputernotes.com/computernetworkingnotes/communication-networks/
https://www.techwalla.com/articles/
https://www.javatpoint.com/transmissionmedia

15. Thank You