OSI Model

The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology.

Transcript

2. Protocol is the law in networking world Network devices oNIC(network interface card) oRouter oSwitch oBridge o ...........etc Network companies (microsoft_ junipr _redhat _cisco)
3. Network Devices Hub NIC Switch Router Bridge
4. Networking Companies
6. (OSI)MODEL Open Systems Interconnect
7. • A Model of How Protocols and Networking components could be made. • “Open” means ;can be used by anyone. • (OSI) Model is 7 layers. • OSI layers is logic.
8. Breaks down the complex. Study complex system. Developing system. Helps in troubleshooting. Each layer has aspecific funcition
9. • Application .All • Presention .People • Session .Seem • Transport .To • Network .Need • Data link .Data • Physical .Processing
12. Microsoft & Redhat Cisco & Juniper
14. • Interface Application • Examples o HTTP: browsing protocol. o FTP: file transfer protocol. o SMTP: simple mail transfer protocol.
15. • Format of data . • Compression and Decompression of data . • Encryption and Decryption of data.
16. • Set sessions between applications . example : msn messenger • Specifies communication mode . (simplex – half duplex – full duplex) • Data stream :010010101010101010101010011110001010100
18. • Tasks : - Flow control - Error recovery • Protocols : -TCP -UDP • Segments segment1 TCP segment2 TCP
19. • Tasks : -Best way to move data - Routing - IP addressing • Packets segment1 TCP IP
20. Data Link Logical Link Control Media Access Control oLLC: Frame network layer. oLLC: Network layer protocol. oMAC: Address the frame. oMac: Make H & T . oSwitch. oFrames segment1 TCP IP Header Tailer Addresses Error Detection
21. Mac Address
22. • Send & Receive Bits • Hub segment1 TCP IP Header Tailer 001010101010101010101010101010101010101010101010101000