Multiple choice

Which of the follwing layers is generally not required in broadcast networks?

  1. Physical layer

  2. Data link layer

  3. Network layer

  4. Transportation layer

  5. Session layer
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C Correct answer
Explanation

The network layer provides the functional and procedural means of transferring variable length data sequences from a source host on one network to a destination host on a different network (in contrast to the data link layer which connects hosts within the same network), while maintaining the quality of service requested by the transport layer. Since, in broadcast networks, the packets have to be sent to all the hosts, this layer is not mandatory.

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