(Disadvantage 1: The address of the local server is 162.131.1.1. After the device is equipped with Unix, TCP/IP and 3C509 network card, the server cannot communicate with the network card. Because the defect is in the equipment process, first check the configuration status of TCP/IP and network card, use #netconfig to reconfigure, pay attention to whether the host network address and subnet mask are accurate, and then Ping162.131.1.1 flashes after confirming that it is correct.)