Pcattcp is a good software for testing lan network speed. The following describes how to use it: 1. Server Run the following command on the server: C:/> pcattcp-R The prompt is as follows: Pcausa test TCP utility v2.01.01.08 TCP receive Test Local host: WWW-B722D776BC1 ************** Listening...: on port 5001 The prompt shows that the server has listened to the client connection. 2. Client After the server is configured, run the following command on the client: C:/> pcattcp-T192.168.0.1 The red part is the Server IP address. The prompt is as follows: Pcausa test TCP utility v2.01.01.08 TCP transmit test Transmit: TCP-> 192.168.0.1: 5001 Buffer size: 8192; Alignment: 16384/0 Tcp_nodelay: Disabled (0) Connect: connected to 192.168.0.1: 5001 Send mode: Send pattern; number of Buffers: 2048 Statistics: TCP-> 192.168.0.1: 5001 16777216 bytes in 0.28 real seconds =58306.05 KB/sec++ Numcils: 2048; msec/call: 0.14; CILS/sec: 7288.26 You can see the inter-network transmission speed (in red) through the prompt)