Why are the Internet and LAN sometimes connected?

Yes, you can share the broadband connection of the computer that already has a broadband connection to the other computer to surf the Internet together.

Specifically, you are in the "Internet Neighbors", select the attribute with the reverse key, and then you will see that there is a same icon as the "broadband connection" of the desktop, in the "broadband connection" anti-key "Properties", and then click to share some connections, after clicking, you have to choose a network card to give another computer as access, you will choose "local connection", after selecting the point to confirm, the system will prompt that the IP of the "local connection" will be changed to ", you don't have to care, you can be sure all the time.

Next, you'll need to configure the IP of the NIC on another computer.

The specific configuration is as follows, choose one from 2 to 254).

Subnet: Gateway:

DNS: If you know the local DNS server address, you can fill it in directly, if you don't know, you can also fill it in.

How do I know my local DNS? You can connect a computer with a broadband connection to the Internet first, and then enter "cmd" in "Start--Run".

Then type "ipconfig all" and press enter.

At this time, you can see all the information of the "broadband connection", including the external IP you obtained, etc., your main goal is to find DNS, and after seeing what the number is, you can fill it in the network card configuration of another machine.

According to your current situation, it can also be used, of course, it may be that the network card you use to connect to the external network is not necessarily connected to the modem, that is to say, your server may not access the Internet through a broadband connection, and there may be a route on it, right?

Then you assign an address to that extranet NIC.

It is best to specify an address for the network card of your intranet, not necessarily with the address assigned by this xp, because it may not be the same network segment as the computer in your intranet, then you can do this, after the system automatically assigns this address, you can manually change it to the intranet address you need.

Of course, I'm sharing a broadband connection, so what is your actual situation? You should use your extranet network card to make a share out.

The landlord should pay attention to see if there is an IP conflict with other machines in the LAN There are many reasons for your situation I said this is more common.

If the network cable is not in good contact, change the network cable.

Check if there is anything wrong with the switch or router!

Summary. As described, it is caused by an error in the network setting, poor network cable contact, or no power on the upper-layer network equipment. The recommendations are as follows: 1. Restart the router and switch and plug the network cable again.

2. Reset network settings.

What happens if the intranet suddenly can't be connected?

As described, it is caused by an error in the network setting, poor network cable contact, or no power on the upper-layer network equipment. The suggestions are as follows, restart the router and the Bank of Communications wheel to change the machine, replug the network cable, and reset the network settings.

3. Reset the NIC driver.

1.Desktop, Computer, Right-click Properties, 2Open Device Manager and find the network adapter.

3.Right-click on the network card to uninstall, uninstall the option do not tick, OK, and then restart 4After restarting, the network card will be automatically reinstalled, and wait for 2-3 minutes for the completion of the Anbu Chunzhou outfit.