为什么网络只能发不能收（Why cant the network send out）.docVIP

为什么网络只能发不能收（Why cant the network send out） [IT168] in everyday network maintenance, we often encounter such a strange problem: the machine can only send packets, but can not receive packets. There are many reasons for it. Maybe the network card may cause the problem of the line and so on. The following three cases are the three cases that I have encountered and share with you: Network card to blame Fault phenomenon: the company LAN can not connect to a computer, the local network connection status only sends data, and receives the data packet is 0. Troubleshooting: use notebook computer test, the network is normal, so replace the computer network card, troubleshooting. Fault reason: NIC physical failure. Twisted wire to blame Fault phenomenon: using the routing function of ADSL MODEM, I share a ADSL broadband Internet access with six neighbors through a 10M HUB, which has been operating normally for a month. The day before yesterday, the computer at home suddenly can not access the Internet, ADSL virtual dial-up impassability, and the other five are normal access to the internet. Troubleshooting: the first suspect is a system failure, then reinstall the Windows in the XP card driver, ADSL reconstruction is still not a dialup connection, dial, and then change the notebook computer, the Internet can use other normal in their own fault still, which precludes the computer itself problem. In the HUB up port, and even directly connected to the ADSL MODEM, the failure is still the same, while others use the port can be normal access to the Internet, which also ruled out the HUB port failure. Check the local connection, network connection icon displayed on the taskbar, it did not appear X (in fact no network when the network connection is often a X icon), then check the network connection status, found that only send data packets, packet reception is 0, which concluded that the network connection problem, so check the line, to see whether there is twisted or broken, found n