OSI Protocols (3)

• Transport

  • connection oriented services: TP0 (simplest), TP1, TP2, TP3, TP4 (most complex)
  • connection-less service: TP4

• Session : defined by ISO 8326, ITU-T X.215, ISO 8327, ITU-T X.225, ISO 9548

Presentation

Session

SS-User

Session

Service

SSAP

Session Service Access Point

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