Step by step teach you how to find out the failure methods of the LAN

Step by step, I will teach you how to find the failure methods of the LAN. A friend asked me to solve the problem of how to find the failure of the LAN and asked many people for a satisfactory answer. Below is a similar answer to the question found on the Internet.

Network failures often occur, just as people often get sick. After a network problem occurs, Do not worry and stay awake. Find out where the problem is, generally in the following situations:

 

How to find faults in the LAN

◆ How to find out the LAN fault: when the entire network is disconnected, it may be a switch or hub problem, depending on whether the switch or hub is working properly.

◆ How to find out the LAN fault: Only one computer cannot access the network, that is, when the computer's "Network Neighbor" is turned on, it can only see the local computer, but not other computers, maybe there is a problem with the network card and switch connection, then we first have to look at the RJ-45 crystal head is not bad contact. Then, use the wire measuring instrument to test whether the line is broken. Finally, check whether the port on the vswitch works properly.

◆ You cannot view the Local Computer in "Network Neighbor", or use the "PING" command to start "Start/run". If the IP address of the local computer cannot be pinged, it indicates that there is a problem with your network settings, so the first thing we should think of is the network card. We can open the "control panel/system/device management/network adapter" setting window.

◆ How to find the LAN fault: In this window, check whether there are any interruptions and I/O address conflicts. Generally, the NE2000 series Nic is IRQ3, the nic of the 8029 chip is IRQ10. If no Nic conflict exists, check whether the driver is in good condition and reinstall the NIC Driver.

◆ How to find out the local area network failure: other computers in the network can be seen in "Network neighbors", but you cannot access them, it may be that your network protocol settings are wrong. Delete your previous network protocols, reinstall them, and reset them.