Answer:
D. ASM
Explanation:
There are three types of transmission, namely;
Unicast, Multicast and broadcast.
Multicast is a form transmission where packets are sent to a specific group of computers in a network. It can be a one to many or a many to many transmission. There are different types of multicast transmission, they are,
ASM (Any source multicast transmission)
SSM ( Source specific multicast transmission) etc.
ASM and SSM are opposite in their functions, as ASM transmits multicast packets from multiple sources without using any rendezvous point, but SSM only transmit from a specified source address.