OSI model Data Link Layer's primary function:

OSI model Data Link Layer's primary function:

  1. a) Packet routing
  2. b) Error detection & correction
  3. c) end-to-end communication
  4. d) Data encryption

From the BCS Technical Cadre (CSE) October 2025 – 49th BCS Written (Special) (BPSC) exam, question 3 of 123.

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