In the multicast network environment, how do an IGMPv2 host and an IGMPv1 router on the same LAN interact with each other? (Multiple Choice)
A . The IGMPv1 router considers IGMPv2 Report messages invalid and ignores them.
B . When the IGMPv1 router acts as an effective IGMP querier, the IGMPv2 host must send IGMPv1
Report messages to the router.
C . When the IGMPv2 host detects that the IGMP querier is running IGMPv1, it must always respond to the querier with IGMPv1 Report messages.
D . When the IGMPv2 host leaves the group, it still sends an IGMP leave message, and this message can not be suppressed.
Answer: ABC