OSI (Open System Interconection) terdiri dari 7 lapisan (layer), yang masing-masing layer memiliki fungsi tersendiri.
7 Lapisan OSI :
Application (Layer 7)
Presentation (Layer 6)
Session (Layer 5)
Transport (Layer 4)
Network (Layer 3)
Data Link (Layer 2)
Physical (Layer 1)
TCP/IP Model :
Application
Transport
Internet
Network
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