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which of the following layers of the OSI Model?

A circuit level gateway works at which of the following layers of the OSI Model?

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A.
Layer 5 – Application

B.
Layer 4 – TCP

C.
Layer 3 – Internet protocol

D.
Layer 2 – Data link

5 Comments on “which of the following layers of the OSI Model?

  1. TetraGrammatonCleric says:

    Answer: A Layer 5-Application
    Circuit level gateways are deployed at the *Session layer* of the OSI model and they monitor sessions like TCP three way handshake to see whether a requested connection is legitimate or not.

    The TCP/IP model includes the Session layer (and Presentation) in the Application layer.


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