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Module 3: Network Layer & Routing

20252m

ARP protocol is used for:

  • (i) Mapping MAC to IP
  • (ii) Mapping port to process
  • (iii) Mapping IP to MAC
  • (iv) Mapping host to domain
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Answer: (iii) Mapping IP to MAC

ARP finds the MAC (physical) address corresponding to a known IP (logical) address on the same LAN. (Mapping MAC to IP is RARP; port to process is a transport-layer job; host to domain is DNS.)

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