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Which statement correctly compares the OSI model with the TCP/IP model?

The OSI session, presentation and application layers roughly map onto the single application layer of the TCP/IP model. OSI has seven layers against four in TCP/IP, the internet layer matches the OSI network layer, and both models have a transport layer.

  1. ATCP/IP has seven layers, while OSI has four
  2. BThe OSI session, presentation and application layers roughly correspond to the single TCP/IP application layerCorrect
  3. CThe TCP/IP internet layer corresponds to the OSI data link layer
  4. DThe OSI transport layer has no equivalent in TCP/IP

Explanation

OSI has seven layers and TCP/IP has four (or five in some texts). The top three OSI layers are merged into TCP/IP's application layer. The internet layer maps to OSI network layer, not data link, and transport exists in both models.

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