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Module 3: Network Layer & Routing

20232m

The protocol that maps a physical (MAC) address to the corresponding logical address is
(i) ARP
(ii) RARP
(iii) ICMP
(iv) IMAP4

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Answer: (ii) RARP

  • RARP (Reverse Address Resolution Protocol) maps a physical (MAC) address to a logical (IP) address. A diskless host that knows only its MAC address uses it to ask a RARP server for its IP address.
  • ARP does the opposite: it maps a logical (IP) address to a physical (MAC) address.
  • ICMP reports errors and control messages, and IMAP4 is a mail access protocol.

(RARP has been superseded by BOOTP and DHCP.)

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