IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select
A . When the group shake source sends IP6 multicast data, the TTL value of the packet is set to limit the transmission range of the group shake
B. There is a special field in the IPv6 multicast address that specifies the propagation range of multicast.
C. Multicast scope is just a concept of spreading scope, and there is no specific technical implementation.
D. During network configuration, the administrator uses the configuration command at the edge of the network to limit the multicast scope.

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Answer: B,D