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Module 3: Network Layer & Routing

20192m

Which one of the following is not a function of network layer?
(i) Routing
(ii) Inter-networking
(iii) Congestion control
(iv) None of the above

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Answer

(iv) None of the above

Explanation

All three listed functions can be associated with the Network layer:

  1. Routing: Determines suitable paths for packets through an internetwork.
  2. Internetworking: IP provides communication across interconnected networks.
  3. Congestion control: Network-layer mechanisms and protocols can participate in congestion management, although congestion control is also handled at the Transport layer in systems such as TCP.

Therefore, none of options (i), (ii), or (iii) is the intended answer as a non-function.

Final answer: (iv) None of the above.

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