ITPEC IP October 2023 Question 33
ITPEC IP October 2023 — Question 33 of 100
Multicast delivers one packet stream to multiple members of a designated destination group. The sender transmits to a multicast group address, and network devices replicate packets where paths to subscribed receivers diverge. This is more efficient than sending an independent unicast copy to every receiver.
Answer (c)
Why not others:
- (a) DNS maps names to addressing information
- (b) URL identifies the location or access method of a resource
- (d) Multilink combines multiple communication links; it does not describe group packet delivery
Key rule: Unicast is one-to-one, broadcast is one-to-all on a scope, and multicast is one-to-a-selected group.
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