OSI Model
Developed by International Organisation of Standardisation (ISO), the Open System Interconnection Model is a theoretical representation of what goes on between two computers to help in understanding and developing computer-to-computer communication.
The OSI Model divides network architecture into 7 layers:
Physical
Data Link
Network
Transport
Session
Presentation
Application
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OSI LAYER FUNCTION
1.Physical - Manages hardware connections
2.Data Link - Codes, addresses and transmits information
3.Network - Determines transport routes and handles the transfer of messages
4.Transport - Ensures accurate delivery of data
5.Session - Establishes, maintains, and coordinates communication
6.Presentation - Handles text formatting and displays code conversion
7.Application - Transfers information from program to program
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