What Are Two Functions of IGMP Snooping? (Choose Two

Multiple Choice

What are two functions of IGMP snooping? (Choose two.)

A) Enabling hosts in a UDLR environment to join a multicast group sourced from an upstream network.
B) Learning and maintaining multicast group memberships at the Layer 2 level.
C) Constraining multicast traffic to VPLS interfaces.
D) Determining the ports that should receive multicast traffic from certain sources or groups.
E) Restricting multicast packets for IP multicast groups that have downstream receivers.