📡 TCP/IP model

5 layer model
Protocol suite that pre-dates the OSI model

Difference between TCP and OSI

The TCP model combines application, session and presentation layer together into the application layer

Layers:

1. Physical
   • Cables, NIC
   • Everything you can touch
2. Data Link
   • Ethernet, Switches
3. Network
   • IP, Routers
4. Transport
   • TCP, UDP
5. Application
   • HTTP, FTP, SMTP

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