Which two of these are characteristics of multicast music on hold? (Choose two.)

A.
It uses one-way RTP point-to-point.

B.
There is a single user per audio stream.

C.
Networks and devices have to support multicast.

D.
It decrements by port number for different audio sources.

E.
It uses the multicast group address 239.1.1.1 to 239.255.255.254.

F.
It uses service parameters to set the codec type or types that are used by conferencing services