200-150 · Question #93
Which two layers of the OSI model are combined in the Internet protocol suite application layer? (Choose two.)
The correct answer is D. 5 E. 6. The TCP/IP (Internet protocol suite) model condenses the seven OSI layers into four layers, with the TCP/IP Application layer absorbing OSI layers 5 (Session) and 6 (Presentation) alongside OSI layer 7 (Application).
Question
Which two layers of the OSI model are combined in the Internet protocol suite application layer? (Choose two.)
Options
- A2
- B3
- C4
- D5
- E6
- F7
How the community answered
(34 responses)- A3% (1)
- B3% (1)
- D94% (32)
Why each option
The TCP/IP (Internet protocol suite) model condenses the seven OSI layers into four layers, with the TCP/IP Application layer absorbing OSI layers 5 (Session) and 6 (Presentation) alongside OSI layer 7 (Application).
OSI Layer 2 (Data Link) maps to the Network Access layer of the TCP/IP model, not the Application layer.
OSI Layer 3 (Network) maps to the Internet layer of the TCP/IP model, not the Application layer.
OSI Layer 4 (Transport) maps directly to the Transport layer of the TCP/IP model, remaining a distinct separate layer.
OSI Layer 5 (Session) is collapsed into the TCP/IP Application layer because TCP/IP treats session management as a responsibility of the application itself rather than a separate protocol layer.
OSI Layer 6 (Presentation) is also merged into the TCP/IP Application layer because data formatting, encryption, and encoding functions are handled directly by application-layer protocols in the TCP/IP model.
OSI Layer 7 (Application) is the named equivalent of the TCP/IP Application layer and is not simply 'combined in' - it is the direct counterpart that gives the layer its name.
Concept tested: OSI to TCP/IP model layer mapping and consolidation
Source: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13769-5.html
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