Hey guys,
I will explain about ISO-OSI model.
ISO – International Standard Organization model.
OSI - Open System Interconnection model.
It is a conceptual layered reference model for communication it proposed by international organization for standardization that is ISO.
It has 7 layers and each layer it having to each own function the 7 layers OSI model from top to bottom are:
7. Application – Provides the user interface.
6. Presentation – Encryption corresponding encoding and translation.
5. Session – Dialog control enabling session, maintaining session and disconnecting session.
4. Transport – End to end data delivery & error correction. (Segmentation)
3. Network – Logical addressing & Routing.
2. Data Link- Physical addressing & Framing.
1. Physical – Convert the data into bit steam according to the transmission media.
Sender End:
7. Application - Provides user interface and creating data. 6. Presentation – Encryption, compression, encoding translation. 5. Session – Ending, maintaining, disconnection the session.
4. Transport – Segmentation, sequencing, acknowledge. 3. Network - Logical addressing & routing (Packet formation). 2. Data Link - Physical addressing & framing. 1. Physical – Convert data into bit steam according to the transition media.
Receive End:
7. Application – File server, message, print server, database server, web mail.
6. Presentation – Decryption decompression, decoding
5. Session – keeping the data safe and the whole data host will never completely get lost if some crash happens.
4. Transport – Reassembly of segmentation carding to the sequence
3. Network – It again reassembles them to the original size, thus becoming space efficient as a medium less load.
2. Data Link – In this mechanism, it pushes the sender after the data is transmitted to stop and wait from the receiver's end to get the acknowledgment of the frame received at the receiver end.
1. Physical - To provide mechanical and electrical specifications
coax, fiber, wireless, hub, repeaters.