模拟网桥转发帧的过程。模拟一台两端口的网桥。使用两个数据文件模拟网桥连接的两个局域网段上传输的帧，为了模拟帧传输，从第一个文件读取一个帧，然后从第二个文件读取一个帧，依此类推。对每个帧显示网桥是否会把帧的拷贝转发到其它局域网段，并给出传输结束后网桥中的转发表。-Simulation of bridge fr a me forwarding process. Simulation of a two-port bridge. Simulation data files using the two bridges connecting the two LAN segment transmission fr a me, in order to simulate the fr a me transmission, from the first document to read a fr a me, and then read from the second document of a fr a me, and so on. For each fr a me whether the bridge will show the fr a me copy forwarded to other LAN segment, and gives transmission after the end of the bridge forwarding table.