ITPEC FE Morning April 2018 Question 34

Source exam: ITPEC FE Morning April 2018Topic: Networks

ITPEC FE Morning April 2018 — Question 34 of 80

ARP Response Delivery Model — ARP response uses unicast delivery.

ARP operates in two steps:

  • •ARP Request → sent as broadcast to all hosts: "Who has IP x.x.x.x?"
  • •ARP Response → sent as unicast directly to the requester (its MAC is known from the request frame)

Why not others:
- (a) Anycast — routing to the nearest node sharing one IP; used in DNS/CDN, not ARP
- (b) Broadcast — applies to ARP request, not response
- (c) Multicast — delivery to a subscribed group; ARP does not use multicast

Key rule: ARP Request = broadcast, ARP Response = unicast.

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