Differences between the OSI and TCP/IP models

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AspectOSI ModelTCP/IP Model
Number of Layers74
Layers1. Physical1. Network Interface
2. Data Link2. Internet
3. Network3. Transport
4. Transport4. Application
5. Session
6. Presentation
7. Application
DevelopmentDeveloped by ISODeveloped by ARPANET
UsageTheoretical model for understanding and designing networksPractical model for actual network communication
Example ProtocolsEthernet (Data Link), IP (Network), TCP (Transport), HTTP (Application)Ethernet (Network Interface), IP (Internet), TCP/UDP (Transport), HTTP/FTP (Application)
Layer FunctionsEach layer has a specific function and communicates with the layers directly above and below itLayers are more flexible and can combine functions from multiple OSI layers

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