ITPEC IP October 2023 Question 33
Which of the following is the term that describes a network device copying a packet and sending it to multiple destinations?
Explanation
Multicast — one transmission to a group of destinations, with network devices copying the packet where the paths divide.
The sender sends a single packet to a multicast group address. Routers and switches copy it only where the paths to the group's members branch, so each link carries one copy however many receivers lie beyond it. This saves bandwidth for video and audio delivered to many viewers at once.
Answer (c)
Why not others:
- •(a) DNS — the service that translates domain names into IP addresses
- •(b) URL — the address that identifies a resource on the Web, such as a page
- •(d) Multilink — bundling several physical lines into one logical link to gain bandwidth; it is about one connection, not copies to many destinations
Key rule: Unicast sends to one destination, broadcast to every host on the network, multicast to the members of a chosen group.
Networks · AI-written, may contain errors
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