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.

Answer: B,D