网络转发器 用于运行在可以跨两个网段的机器上用来作为一个TCP应用层的一个桥，当然也可以用来在应用层截获数据和分析数据-network transponders can be used to run across the network of the two machines used as a TCP application layer 1 bridges, of course, can be used in application-layer data interception and