Which three OSI model layers correspond to the TCP/IP model's Application layer?

Question

Options

• AApplication, Presentation, and Transport
• BPresentation, Session, and Transport
• CApplication, Presentation, and Session
• DThere is not a direct match (the TCP model was created before the OSI model)

• A
  3% (1)
• B
  8% (3)
• C
  87% (33)
• D
  3% (1)

Explanation

The TCP/IP model's Application layer maps to three OSI model layers: Application (Layer 7), Presentation (Layer 6), and Session (Layer 5). The TCP/IP model is a simplified 4-layer model, so its Application layer consolidates the top three OSI layers. The OSI Application layer handles user-facing protocols (HTTP, FTP), the Presentation layer handles data formatting and encryption, and the Session layer manages communication sessions. Option A is incorrect because it includes Transport instead of Session. Option D is factually wrong - a mapping does exist between the two models.

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