问题:
A . With IGMPvl, queries are sent to a specific group
B . Hosts issuing IGMPvl requests will be correctly interpreted by IGMPv2 hosts due to backwardcompatibility
C . An IGMPv2 router will ignore IGMPv2 leave messages when IGMFVl hosts are present
D . With IGMFV2, a leave message is supported
E . An IGMPv2 host will send an IGMFVl report on an IGMFVl router
F . An IGMPv2 router can only allow IGMPv2 hosts to execute a join request
● 参考解析
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