The document provides an overview of the OSI model, detailing its seven layers, including the Application, Presentation, Session, Transport, Network, Data Link, and Physical layers. Each layer's function is explained, highlighting their roles in data transmission and communication between applications across networks. The conclusion summarizes the significance of the OSI model in understanding network architecture.

1. OSI Model
Md. Mosharof Hosen
Dept.of CSE

2. OSI Model
7 Layer of OSI Model
Describe ISO Model Layer
Conclusion
Content

3.  OSI Reference Model - internationally standardized
network architecture.
OSI Model

4.  Level at which applications access network
services.
-Represents services that directly support
software applications for file transfers,
database access, and electronic mail etc.
Layer 7: Application Layer

5.  Related to representation of transmitted data
 Providing services for secure efficient data
transmission
-e.g. data encryption, and data compression.
Layer 6: Presentation Layer

6.  Allows two applications on different computers
to establish, use, and end a session.
 Establishes dialog control
 Performs token management and
synchronization.
Layer 5: Session Layer

7.  Manages transmission packets
 Handles error recognition and recovery
-Transport layer at receiving
acknowledges packet delivery.
Layer 4: Transport Layer

8.  Manages addressing/routing of data within
the subnet
 Routing can be:
Based on static tables
determined at start of each session
Individually determined for each packet,
reflecting the current network load
Layer 3: Network Layer

9.  Packages raw bits from the Physical layer
into frames
 Provides reliable transmission of frames
Layer 2: Data Link Layer

10.  Transmits bits from one computer to another
 Regulates the transmission of a stream of
bits over a physical medium.
 Defines how the cable is attached to the
network adapter and what transmission
technique is used to send data over the cable.
Layer 1: Physical Layer

11.  Overall, this presentation I had tried to
describe the OSI model, what it is all about
and how communication occurs through the
layers of the model from one user to another
.
Conclusion

12. Thanks to all