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1·User2 login information used as the replier to the instant messages from the master.

User 2登录信息用作接收者，从发送者接收即时消息。

2·ARMER is a reliable multicast algorithm that active router carry out error recovery with replier assisted.

ARMER是一种答复者辅助主动路由器进行差错恢复的可靠组播算法。