本文介绍了接入内部网的用户间通信的两种方法，着重介绍了可变ip地址用户间通信支持系统的设计与实现。
Two methods of communication among the users who access the network is introduced in the paper. It is discussed the design and implementation of variable IP address user communication support system.
第四章还介绍了内部网用户地址管理的主要问题，并设计了基于SNMP协议和交换机地址转发表的用户地址管理方法。
The chapter then analyzed the main problem in of address management in intranet and gives out a method based on SNMP and dot1dTpFdbTable in switches to solve that problem.
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