How does the network limited warning appear under win 7 system

Believe that the network is restricted. Everyone has met. Sometimes, although the network is limited, it is still possible to access the Internet. Sometimes it is not very comfortable, but why is it limited? If your computer is running the Windows 7 operating system, you may notice the "Network Restricted" warning, which is a very special limitation: you can access any domestic website, but access to international websites. All are limited.

The question is: How does Microsoft know your network connection?

Originally, every time a user connects to the network, Windows 7 sends an access request to a Microsoft domain name. The result is used as a Network Connectivity Status Indicator (NCSI). Vista took the lead in adopting this service.

NCSI first performs a DNS query on dns.msftncsi.com and then requests access to the file. This is a plain text file containing only the text "Microsoft NCSI" . Dns.msftncsi.com should resolve to 131.107.255.255, if the address does not match, then it will guess that the network connection is not working properly.

For this feature of NCSI, some users may be concerned about privacy issues, because Microsoft will record the IP address of each connection in the website log. If you don't want Microsoft to know your network connection, you can modify the registry to disable the NCSI service, or modify it to access your own server.

I believe that everyone who has problems with network restrictions does not know why, and sometimes this problem is automatically improved. Today, I explained to everyone that the network is limited. I don’t know if you are going to watch it. I hope to be useful to you.