The network of every university campus is a local area network, which is why after the school logs in to the website, the resources of the university library can query the content, but not outside the school. Nowadays, the university network is generally better. In order to protect students' network on campus, schools usually use local area network, requiring students to enter their student number or mobile phone number and set a password when logging in to ensure students' access to the network.

If it is a local area network, then it is a small local area network, and then the IP address is the IP address of this small local area network.