Computer science seminar presentation on the topic computer networks foor class 12 students

Computer networks
Class 12
Ncert
Cbse
Seminar

1. SEMINAR ON THE TOPIC
DATA COMMUNICATION
PROTOCOLS
PRESENTED BY THEJASSRI.R

2. PROTOCOL is a set of
standard rules that govern
how data is transmitted
and received between
devices on a network.
WHAT IS A PROTOCOL?

3. NEED FOR PROTOCOLS
We need protocols for different reasons such as flow control,
access control, addressing, etc. Flow control is required when the
sender and receiver have different speeds of sending and receiving
the data.
Access control is required to decide which nodes in a
communication channel will access the link shared among them
at a particular instant of time. Otherwise, the transmitted data
packets will collide if computers are sending data simultaneously
through the same link resulting in the loss of data.

4. HTTP:
Hypertext Transfer Protocol (HTTP)
Purpose: It is the primary protocol used to access the world
wide web.
Functionality: Operates on a client-server model where a client
(browser) sends requests to a server, and the server responds
with the requested data.
Key Feature: Defines how web browsers and servers
communicate and how web pages are formatted and
transmitted.

5. FTP:
File Transfer Protocol (FTP)
Purpose: Facilitates the transfer of files between a client and a
server over a computer network.
Functionality: Allows users to upload, download, and manage
files on a remote server.Like HTTP,FTP also works on a client
server model.
Key Feature: Utilizes a separate control connection for
commands and a data connection for the actual file transfer.

6. PPP:
Point-to-Point Protocol (PPP)
Purpose: A data link layer protocol used to establish a direct connection
between two nodes over a serial cable, phone line, or other physical
medium.
Functionality: Provides a standard method for encapsulating network layer
protocols (like IP) over a serial link.
Key Feature: Widely used for dial-up internet connections and establishing
direct connections between routers.

7. SMTP:
Simple Mail Transfer Protocol (SMTP)
Purpose: The standard protocol for sending and receiving email messages
between email servers.
Functionality: Handles the transmission of email from a sender's mail
server to a recipient's mail server.
Key Feature: Primarily a "push" protocol, pushing emails from the sender's
server to the recipient's server.

8. TCP:
Transmission Control Protocol (TCP)
Purpose: A core transport layer protocol in the TCP/IP suite, providing
reliable, ordered, and error-checked delivery of data streams between
applications.
Functionality: Establishes and manages connections, segments data
into packets, ensures ordered delivery, and handles retransmissions
of lost packets.
Key Feature: Connection-oriented and provides flow control and
congestion control mechanisms for robust data transfer.

9. THANK YOU