What does it mean that the computer does not have a valid IP address

If the "Local Connection" display status changes to "Restricted or No Connection" for no reason, this is usually due to the fact that the NIC is not assigned a fixed IP address. Under normal circumstances, when we find that the display status of "Local Connection" is abnormal, we can often try to set a static IP address for the network connection first, which can often solve many inexplicable network failures for us. Once we find that the local network connection does not use a fixed IP address, we can click the "Start" "Settings" and "Network Connection" commands in turn, and then in the network connection list interface, right-click the "Local Connection" icon with the mouse, and execute the "Properties" command from the right-click menu to open the property setting window of the local connection; In the "General" tab page of the window, select the "Internet Protocol" item and click the "Properties" button once.

After that, check the "Use the IP address below" option, and try to set the IP address of the local computer to ", and then set the IP address of the local gateway to "By default, the factory IP address of most ADSL devices is, and finally click the "OK" button, and restart the computer system, I believe that the state limited fault of "local connection" can be solved most of the time.

The computer has no network, and the network shows that there is no valid IP address.

This situation is not surprising: 1. If the IP address of the computer and the connected device are not in the same network segment (for example, the computer IP is, and the device is, use the dot ".)."The first two segments of the separation are the same, but the 0s and 1s of the third segment are not the same, which is a typical example of not being in the same network segment), then computers and devices cannot exchange data.

2. The device has turned off the DHCP (automatic IP address) setting, or turned on the DHCP setting, but the number of IP addresses allowed to be automatically assigned is very small, (for example, there are only two computers at home, and the number of IPs allowed to be assigned by the router is set to 2, and both computers are connected to the Internet, and the addresses are exhausted) have all been allocated, and the IP address cannot be automatically obtained. Solution: 1. Set the IP address of the computer and the connected device to the same network segment (Note:

In the above example, the first three segments of the IP address must be the same, and the fourth segment must be different to be considered the same network segment). Generally, the router or other equipment is marked in the manual or in a conspicuous position on the fuselage. 2. Open the DHCP setting on the device side, or increase the number of IP addresses that can be automatically assigned.

Friendly reminder: The IP address seems to be only 4 segments, and all the ** in the world only accounts for a small part of it, and the possible combination of its values is huge! Routers, modems, and other devices can set any IP, such as:

So finding the manual doesn't necessarily solve the problem, and the easiest way is to reset it to the default settings of the manual with "reset".

If there is no IP assignment for WiFi, it may be a problem with the IP address setting of the computer's WiFi, or it may be a problem with the WiFi connection between the computer and the router, or it may be that the router has turned off the DHCP service. Here's how:

There are two ways to configure the IP address on the computer: [Auto Acquisition] and [Fixed IP Address]. When connecting to WIFI, you need to set the IP address on the computer to [automatically obtained] (dynamic IP) by default, if the administrator requires a fixed IP address to surf the Internet, you need to fill in the correct IP address, subnet mask, gateway and DNS server address in [Local Connection].

2. It may be a wifi connection problem between the computer and the router

In order to obtain the IP address from the router, the computer must be connected to the router with a network cable or WiFi. If the wifi connection on the router is abnormal, the local connection does not have a valid IP configuration will appear on the computer. In this case, it is advisable to reconnect the wifi and if the fault persists, try restarting the router.

3. It may be that the DHCP service is turned off on the router

If the router shuts down the DHCP server, the IP address cannot be automatically obtained and you need to manually enter it. It is recommended to contact your network administrator to obtain an IP address. If it is a home router, you can restore the router to factory settings, go to the router background page, select [DHCP Server] to enter the configuration interface, select [Enable DHCP Service] and restart the router.