网络拓扑发现是指发现网络元素并确定网络元素之间的互连关系，包括互连设备（如路由器、网桥、交换机等）、主机和子网。-Network topology discovery is the discovery network elements and to determine the interconnection between network elements, including the interconnection equipment (such as routers, bridges, switches, etc.), host and subnet.