Server-centric model
Workgroup model
Peer-to-peer model
OSI reference model
Physical
Data Link
Network
Transport
Physical
Data Link
Network
Transport
Physical
Data Link
Network
Transport
Physical
Session
Application
Presentation
Physical
Session
Application
Presentation
Physical
Data Link
Network
Transport
TCP
UDP
FTP
RDC
Well-known ports
Registered ports
Dynamic ports
Private ports
Physical
Session
Application
Presentation
Physical
Session
Application
Presentation
Physical
Session
Application
Presentation
3
4
6
7
Physical
Data Link
Transport
Application
RARP
ARP
DNS
WINS
Well-known ports
Registered ports
Dynamic ports
Sliding ports
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