What is the reason why the network can't connect?

There are many reasons why the network can't connect, which may be:

1, the network cable is disconnected.

2. There is something wrong with the network card

The line is blocked.

4. The plug is loose

All these problems will lead to network connection failure. If the network connection fails, you can do this:

1, you can restart the computer first. If you still can't connect to the network after restarting, be sure to see if the indicator light of the router is on. If it doesn't light up, there is something wrong with the network cable. If the indicator light is on, the network cable is ok.

2. See if there is any problem inside the computer, and check the network card.

3. If it still doesn't work, call to ask if the network fee has expired and the network card is loose.

If it still doesn't work, it should be sent to specialty store for repair.

Extended data

Data failure

edit

Troubleshooting method: replace and troubleshoot in turn.

I. Hardware issues

1. Line problem.

Please use the line tester to test whether the network cable is unblocked;

2. Network card.

The connector of the network card has poor contact or the network card itself has problems. Please connect the normal network cable and test it with a horizontal tester to determine whether the network card works normally.

3. Switch failure (router, cat).

You can try to connect the network cable to one end of the switch and replace the socket, or restart the switch;

4. Network card working mode.

You can try to manually modify the working mode of the network card and change "automatic" to another mode. Although the reason is not clear, sometimes the problem can be solved.

Two. Software problem

The firewall caused trouble.

I've only seen this once, that is, turning off the firewall that comes with the Windows system can get back to normal.

References:

Baidu encyclopedia-local connection