Address Resolution Protocol (ARP) interrogates the network by sending out a?

A.
broadcast.

B.
multicast.

C.
unicast.

D.
semicast.

Explanation:
ARP broadcasts a frame requesting the MAC address that corresponds with the destination IP address. Each
computer on the subnet receives this broadcast frame, and all but the computer that has the requested IP
address ignore it. The computer that has the destination IP address responds with its MAC address.
Incorrect Answers:
B: The ARP protocol uses broadcasts, not multicasts.
C: The ARP protocol uses broadcasts, not unicast.
D: The ARP protocol uses broadcasts, not semicast.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 581