GATE2005-24

Question

The address resolution protocol (ARP) is used for:

• A. Finding the IP address from the DNS
• B. Finding the IP address of the default gateway
• C. Finding the IP address that corresponds to a MAC address
• D. Finding the MAC address that corresponds to an IP address

Comments

One additional question -->

Just think "IP and Port No" are enough to identify a process on a host  then what is the requirement of ARP ?

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and RARP does option C?

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at router we dont know port number rt ... so ip+port could not identify

RARP Is option c

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which protocol can be used for getting default gateway's IP???

Answer 1

The address resolution protocol (ARP) is a protocol used by the Internet Protocol (IP) specifically IPv4, to map IP network addresses to the hardware addresses used by a data link protocol.

Show that option D is correct.

Ref: http://www.erg.abdn.ac.uk/users/gorry/course/inet-pages/arp.html

Answer 2

ans d)

Comments

U should explain ur answers...

Answer 3

d.. finding the MAC address that correspondes to an IP address