Layering in Major Architectures
Basic Model
Application
Computer
(Transport)
Internet
TCP/IP
Internet
IPX/SPX
Internet
Subnet
(OSI)
OSI
Application (7)
Presentation (6)
Session (5)
Transport (4)
Network (3):
Internet &
Subnet
Data Link (2)
Application
Application
Transport:
TCP, etc.
Complex:
SPX, etc.
Physical (1)
Subnet
(OSI)
Subnet
(OSI)
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