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Module 2: Data Link Layer & MAC Sublayer

20222m

Which sublayer of the information link layer performs circuit functions that depend on the kind of medium?

(i) Media access control sublayer
(ii) Logical link control sublayer
(iii) Network interface control sublayer
(iv) Both (i) and (ii)

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Answer

(i) Media Access Control (MAC) sublayer

Explanation

The Data Link layer is commonly divided into two sublayers:

  1. LLC (Logical Link Control): Provides a common interface to the Network layer and handles functions independent of the particular transmission medium.
  2. MAC (Media Access Control): Handles functions that depend on the characteristics of the shared medium, especially access to the transmission medium.

Therefore, the sublayer whose functions depend on the kind of medium is the MAC sublayer.

Final answer: (i) Media Access Control sublayer.

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