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  1. Which of the following are layers in the TCP/IP model?
    1. Application
    2. Session
    3. Transport
    4. Internet
    5. Data Link
    6. Physical

    2. A.

     1 and 2
    B.

     1, 3 and 4
    C.

     2, 3 and 5
    D.

     3, 4 and 5

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    Workspace

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    Answer : Option B

    Explanation :

    This seems like a hard question at first because it doesn't make sense. The listed answers are from the OSI model and the question asked about the TCP/IP protocol stack (DoD model). However, let's just look for what is wrong. First, the Session layer is not in the TCP/IP model; neither are the Data Link and Physical layers. This leaves us with the Transport layer (Host-to-Host in the DoD model), Internet layer (Network layer in the OSI), and Application layer (Application/Process in the DoD).

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