Presentation of application,Network And transport layer protocols Created by Ambreen and Shahbaz.pptx

1. Presentation Topic:
Application, Network And Transport Layer Protocols
Presented by: Ambreen Koondhar & Shahbaz Mughal
Roll no: 2k21/NF/CS/02&10
Subject: Computer Networks
Date: 23/5/2023
Instructor: Mam Saba Nizam Memon

2. Application
Layer
 Application Layer the Top layer of OSI Model.
 The Application Layer provides services directly
to user applications.
 It enables users to access the network.
 It provides a user interface and support for
services such as email, remote file access and
transfer, shared database management, and other
types of distributed information services.
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3. File Transfer is a service provided by the Application Layer.
It allows users to transfer files between different devices or
systems over a network.
Examples of file transfer protocols include FTP (File Transfer
Protocol) and SFTP (Secure File Transfer Protocol).
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File Transfer

4. Mail Service
 Mail Service is another service provided by the Application
Layer.
 It enables users to send, receive, and manage emails.
 Popular mail protocols include SMTP (Simple Mail Transfer
Protocol) for sending emails and POP3 (Post Office
Protocol version 3) or IMAP (Internet Message Access
Protocol) for receiving emails.
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5. Directory
Service
Directory Services is a service offered by the Application
Layer.
It provides a way to organize and manage information about
users, resources, and devices on a network.
Examples of directory services include LDAP (Lightweight
Directory Access Protocol) and Active Directory.
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6. Transport Layer
 Transport Layer the forth layer of OSI Model.
 The Transport Layer controls the flow of data.
 It ensures that messages are delivered error-free.
 It divides large messages into small packets for efficient
transmission.
 These packets are reassembled, checked for errors, and
acknowledged at the receiving side.
 If there are errors in transmission, the data is retransmitted.
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7. Function of
Transport
Layer
Flow Control:
 The Transport Layer controls the flow of data..
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8. Function of
Transport
Layer
Error Detection and Correction:
 The Transport Layer ensures that messages are delivered
error-free.
 It includes mechanisms to detect errors in transmitted data,
such as checksums or cyclic redundancy checks (CRC).
 If an error is detected, the Transport Layer can request
retransmission of the corrupted data.
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9. Function of
Transport
Layer
Segmentation and Reassembly:
 The Transport Layer divides large messages into smaller
packets for efficient transmission.
 Segmentation breaks the data into smaller chunks, allowing
them to be transmitted separately.
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10. Function of
Transport
Layer
 Connectionless service :
 Connectionless service in the Transport Layer refers to a
communication method where data packets are sent at a
time then receiver receives that data packets and then
acknowledgement by receiver .
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11. Function of
Transport
Layer
 Service Point Addressing :
 Service Point Addressing in the Transport Layer refers to
the process of identifying specific services running on a
device within a network. It uses port numbers to uniquely
identify and direct incoming data packets to the appropriate
service or application at the receiving end.
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12. Network
Layer
 The Network Layer is responsible for establishing,
maintaining, and terminating network connections.
 It manages the delivery of data from the source to the
destination.
 The Network Layer determines the logical path
between the sender and receiver.
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13. Function of
Network
Layer
Routing:
 The Network Layer is responsible for routing data packets
from the source to the destination.
 It determines the optimal path for data transmission based
on factors like network topology and routing protocols.
 Routing ensures efficient and reliable delivery of data across
interconnected networks.
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14. Function of
Network
Layer
Logical Path Determination:
 The Network Layer determines the logical path between the
sender and receiver.
 It uses routing algorithms and protocols to calculate the
most efficient path for data transmission.
 Logical path determination ensures that data is delivered in
the most optimal and reliable manner.
Addressing:
 The Network Layer assigns unique addresses to devices on
a network.
 These addresses, such as IP (Internet Protocol) addresses,
enable the identification and location of devices.
 Addressing allows data packets to be properly directed to
the intended destination.
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15. Thank you
Any Question