(75)is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group。

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问题 (75)is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group。

选项 A、SMTP
B、ICMP
C、MIME
D、IGMP

答案D

解析 IGMP协议是接收者发现协议,它运行在主机和路由器之间,用于路由器维护组播组是否有组成员。
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