Regarding the multicast ASM model and the SSM model, which of the following statements are correct? (Multiple Choice)
A . The receiver in the SSM model has been unable to know the specific location of the multicast source by other means.
B . The receiver in the ASM model cannot know the location of the multicast source in advance.
C . SSM and ASM use the same multicast address range
D . SSM establishes a multicast forwarding tree directly between the receiver and the multicast source.
Answer: ABD