The document outlines the OSI model, introduced by the International Standards Organization (ISO) in the late 1970s, detailing its seven layers: physical, data link, network, transport, session, presentation, and application. Each layer has specific functions and associated protocols, facilitating error-free data transmission, routing, dialog control, and user service interactions. The document provides a comprehensive overview of the purpose of each layer and examples of protocols utilized within them.

1. OSI MODEL AND ITS
PROTOCOL
By IKHLAS RAHMAN
DAFFODIL INTERNATIONAL
UNIVERSTY

2. Content
OSI MODEL
Physical LayerAND ITS PROTOCOL
Data Link Layer AND ITS PROTOCOL
Network LayerAND ITS PROTOCOL
Transport LayerAND ITS PROTOCOL
Session Layer AND ITS PROTOCOL
Presentation LayerAND ITS PROTOCOL
Application Layer AND ITS PROTOCOL

3. Established in 1947, the International Standards Organization (ISO) is a
multinational body dedicated to worldwide agreement on international
standards. An ISO standard that covers all aspects of network communications is
the Open Systems Interconnection (OSI) model. It was first introduced in the late
1970s.
OSI MODEL
Note:
 ISO is the organization.
OSI is the model.

4. Physical
Layer
Data Link
Layer
Network Layer
Transport
Layer
Session Layer
Presentation Layer
Application
Layer
Seven layers of the OSI model

5. Physical
Layer
Transfer Binary Bit stream from source to destination as a electrical signal.
Encode bits into
signals
Translation of
bits into signals
Synchronization
of bits
Data Rate
Topology
Transmission mode
Purpose

6. Physical Layer Protocol
Digital Subscriber Line.
Integrated Services Digital Network.
Infrared Data Association.
Universal Serial Bus.
Bluetooth.
Controller Area Network.
Ethernet.

7. Data Link
Layer
Send blocks with necessary
Responsible for error-free
transmission over the physical media
Assures error-free data submission
to the Network Layer
purpose
The data link layer is responsible for moving
frames from one hop (node) to the next.

8. Data Link Layer Protocol
LLDP Link Layer Discovery Protocol
PPP Point-to-Point Protocol
Ethernet
FDDI Fiber Distributed Data Interface
Frame Relay
ITU-T G.hn Data Link Layer

9. Network Layer
purpose
The network layer is responsible for the
delivery of individual packets from
the source host to the destination host.
Address translation from
logical to physical
Routing of data
Based on priority
Best path at the time of transmission

10. CLNP Connectionless Networking Protocol
EGP Exterior Gateway Protocol
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
IPSec Internet Protocol Security
ARPAddress Resolution Protocol
RIP Routing Information Protocol
Network link Layer protocol

11. The transport layer is responsible for the delivery
of a message from one process to another.
Transport Layer
SegmentationOf
Reassembly
Connection
Control
Error Control
Purpose

12. Transport Layer protocol
ESP Encapsulating Security Payload over IP or IPSec
SCTP Stream ControlTransmission Protocol
SPX Sequenced Packet Exchange
TCPTransmission Control Protocol
UDP User Datagram Protocol
DCCP Datagram Congestion Control Protocol

13. Session Layer
The session layer is responsible for dialog
control and synchronization.
Synchronization between sender and receiver
Assignment of time for transmission
Start time
End time etc.
Purpose

14. Session Layer protocol
NetBIOS, File Sharing and Name Resolution protocol - the
basis of file sharing with Windows.
NetBEUI, NetBIOS Enhanced User Interface
NCP NetWare Core Protocol
NFS Network File System
SMB Server Message Block

15. Presentation Layer
The presentation layer is responsible for translation,
compression, and encryption.
Translation
Data translation
Encryption
Purpose

16. TLSTransport Layer Security
Presentation Layer protocol

17. Application Layer
The application layer is responsible for
providing services to the user.
Purpose
• User application to network service
interface
• File request from server
• E-mail services
• etc.

18. ADC, A peer-to-peer file sharing protocol
AFP,Apple Filing Protocol
BACnet, BuildingAutomation and Control Network protocol
BitTorrent, A peer-to-peer file sharing protocol
DNS, Domain Name System
DSM-CC Digital Storage Media Command and Control
DSNP, Distributed Social Networking Protocol
DHCP, Dynamic Host Configuration Protocol
ED2K,A peer-to-peer file sharing protocol
Finger, which gives user profile information
FTP, FileTransfer Protocol
HTTP, HypertextTransfer Protocol
Application Layer protocol

19. Thanks..
The End