OSI (Open system inter connection) Reference Model:
The following are OSI reference model
The following are OSI reference model
- Application layer
- Presentation layer
- Session layer
- Transport layer
- Network layer
- Data Link layer
- Physical Layer
Application Layer: the top layer of OSI reference model. the HTTP, FTP,SMTP, DHCP, SNMP protocols are work in this layer.
Presentation layer: this is 2nd layer of OSI reference model.this layer's responsibility is translating the Syntaxes used by different types of application in different computer in the network. in this layer a computer translate the data accumulated by its own applications from its own abstract syntax to a common syntax which is suitable to transmit through the network.
Session layer: the most important task of this layer are dialog control and dialog separation. dialog control is exchange information between two systems on the network. This layer Establishe, manages as well as terminates sessions between applications
Transport Layer: The TCP & UDP protocol works in this layer. This layer provides end-to-end connection between processes.
Network layer: in this layer the is responsible for packaging transport layer data in diagrams, addressing them to its final destination, routing them across the internet-work and fragmenting the diagrams as needed. the internet protocol (IP) work in this layer. This layer translate between different network types
Data link layer: This layer is responsible for network layer packaging network layer data ,addressing to its next destination. the PPP , SLIP works in this layer.
