Connected to the school network, unable to enter the school home page, library and so on, just use the external network. What happened to my computer?
What is the ip address of the school homepage that you analyzed with the external network? Then, when entering the school network, directly enter the IP address resolved by the external network in IE browser to see if it is a problem with the school dns server. Before this test, you should see if your classmates' computers are the same. If so, it must be that the DNS server does not parse well.