In the multicast service model, in order to improve security, ASM can configure filtering policies for group sources on the router to allow or prohibit packets from specific multicast sources from…

Question

Options

• ATRUE
• BFALSE

• A
  74% (26)
• B
  26% (9)

Explanation

Option A is correct because ASM (Any-Source Multicast) does support the configuration of source filtering policies on routers, allowing network administrators to explicitly permit or deny multicast traffic based on the originating source address - this is a deliberate security enhancement to the model's otherwise open "any source can send" default behavior. Although ASM's defining characteristic is that receivers can join a group without specifying a source, this does not prevent routers from enforcing source-based access control lists (ACLs) at the network layer to block unauthorized or unwanted senders. Option B (FALSE) is incorrect because it wrongly implies that ASM lacks this filtering capability; confusing ASM's permissive default with a total inability to filter is the key mistake to avoid. A helpful memory tip: think of ASM's source filtering as a bouncer at a club - the club (group) is open to anyone by default, but management (the router policy) can still create a blocklist or allowlist of specific sources to tighten security.

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