IP addressing fundamentals: which statement correctly describes a multicast address in IP networking?

Introduction / Context:
In Internet Protocol (both IPv4 and IPv6), addresses can represent different delivery semantics. Understanding the distinction between unicast, multicast, anycast, and special-purpose addresses is essential for routing, switching, and application design (for example, streaming or conferencing).

Given Data / Assumptions:

• The question asks specifically about multicast addressing.
• We compare multicast behavior with unicast and other types described in the options.
• No numeric calculation is required; this is a conceptual classification question.

Concept / Approach:
Unicast delivers one-to-one, multicast delivers one-to-many, anycast delivers one-to-one-of-many (nearest instance), and broadcast (IPv4 only) delivers one-to-all within a broadcast domain. Multicast uses group addresses joined by receivers; senders transmit once and the network replicates as needed.

Step-by-Step Solution:

Verification / Alternative check:
Recall IPv4 Class D range (224.0.0.0 to 239.255.255.255) or IPv6 multicast prefix ff00::/8, both defined for one-to-many delivery where receivers explicitly join groups.

Why Other Options Are Wrong:

• A: Describes unicast (one-to-one), not multicast.
• C: Describes anycast; traffic goes to one (typically nearest) member of a set, not all.
• D: Sounds like unique local or special addresses; not a multicast definition.

Common Pitfalls:
Confusing anycast with multicast and assuming multicast means broadcast. In multicast, only joined receivers get the traffic; it is not flooded everywhere.

Final Answer:
Packets are delivered to all interfaces identified by the address. This is also called a one-to-many address.