Which of the following methods implements multicast scope?

IPv6 multicast introduces the concept of multicast scope.

Which of the following methods implements multicast scope?
A . There is a specific field in the IPv6 multicast address to specify the multicast forwarding scope.
B . When a multicast source sends IPv6 multicast data, the multicast source sets the TTL value of the data packets to limit the multicast forwarding scope.
C . When configuring a network, the administrator uses configuration commands on the network edge to limit the multicast scope.
D . Multicast range is only a concept of the forwarding scope, and it cannot be implemented using technology.

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Answer: A