Refer to the Exhibit.
Referring to the exhibit, which statement is correct?
A.
Only multicasts packets (224.0.1.39) are allowed on the input and output direction.
B.
Auto-RP discovery messages are filtered in the input and output direction.
C.
Rendezvous point announcements are filtered in the output direction.
D.
This filter does not work because the input or output parameter is missing.
Explanation:
Administrative Scoping for Loop Prevention
Scoping limits the routing devices and interfaces that can forward [hence, output direction] a multicast packet. Multicast scoping is administrative in the sense that a range of multicast addresses is reserved for scoping purposes, as described in RFC 2365, Administratively Scoped IP Multicast. Routing devices at the boundary must filter multicast packets and ensure that packets do not stray beyond the established limit.
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224.0.1.39 = Auto-RP Announce
224.0.1.40 = Auto-RP Discovery
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