以SNMP为基础，VC6.0为开发平台，结合CDP协议进行网络内，主机，交换机的拓扑图发现，并且进行了绘制。-SNMP-based, VC6.0 development platform, combined with CDP protocol within the network, host, switch topology diagram found, and were drawn.

基于cdp 网络拓扑发现设计,主要讲解思科中cdp的发现手动-CDP network topology discovery