Details Description of Computer Network OSI Model Layers

1.  Physical Layer:

The main task of physical layer is:

1. To work on topology
2. Networking Mode
3. Bit synchronization
4. Bit rate control
5. Hub , Repeater
6. Wired /Wireless Connection
7. To Maintain Physical Connection

2. Data Link Layer

1. MAC address/Ethernet Address
2. Error free transfer data frames
3. Devices work Switch , Bridge, Modem
4. Flow control
5. Error Control
6. PDU: Frames
7. Node (System) to node (System) connection
8. LLC/MAC =SUB Layer

                   a.LLC :Logical Link Control

                                                              i.      DISPLAY ERROR Message (if any)

                   b. MAC : Media Access Control

                                                           i.      MAC ADDRESS

                                                           ii.      Ethernet Address

                                                          iii.      Physical Address

                                                         iv.      Burned in Address

                                                          v.      NIC Card Address

 3.    Network Layer

1. Routing and Forwarding the packets
2. Internetworking
3. Addressing =IP Address
4. Source to destination Delivery
5. Logical Addressing
6. Multiplexing

1. End to end  layer
2. Point to point layer
3. Process to process delivery
4. Port to port delivery
5. Host to Host
6. Deals with =Acknowledgement of Data
7. Heart of the OSI Model
8. Connection Oriented Service=TCP
9. Connection Less Service =UDP
10. Protocols: TCP & UDP
11. TLS: Transport Layer Security

1. Session Management
2. Synchronization
3. Dialog controller
4. PDU: Data

1. Translation
2. Encryption
3. Decryption
4. Compression
5. PDU: Data
6. Syntax & Semantics
7. Protocol: ASCII, BCD, EDCDIC, JPEG, MPEG, GIF,PNG

Categories: computer network