多选题Which two statements are true about Internet Group Management Protocol (IGMP) snooping?（）AIGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.BIGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.CIGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.DIGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.EIGMP snooping is enabled with the ip multicast - routing global configuration command.
多选题
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?（）
A
IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.
B
IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.
C
IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.
D
IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.
E
IGMP snooping is enabled with the ip multicast - routing global configuration command.
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