针对这个不足提出一种改进的基于地址转发表的物理网络拓扑发现算法。
Aiming at this insufficiency, we propose a new physical Network topology discovery algorithm based on address forwarding table.
算法的主要特点是在交换机地址转发表不完整的情况下，有效地实现正确的拓扑推理。
An important feature of the algorithm is that it can infer the network physical topology correctly on the lack of the integrality of the forwarding database of switches.
在分析原有基于MAC地址转发表算法的基础上，提出一种新的基于生成树协议的拓扑发现算法。
Based on the analysis of the existing algorithm of MAC address forwarding table, it presents a kind of new physical topology discovery algorithm depended on spanning tree protocol.
不需要地址转发表完整而解决了不同子网的结点之间连接关系的判定问题，使得结果更接近实际。
The algorithm gives a link relationship of two nodes which belong to different subnets without complete AFT, and the result is more similar to the fact.
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.
转发模块收到报文以后会根据报文的目的地址查询转发表得到报文的出接口，并根据报文的出接口对报文进行上送或转发。
After receiving packets, forward module will check out the interface of packets based on destination address, and according to the interface to send or forward packets.
转发模块收到报文以后会根据报文的目的地址查询转发表得到报文的出接口，并根据报文的出接口对报文进行上送或转发。
After receiving packets, forward module will check out the interface of packets based on destination address, and according to the interface to send or forward packets.
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