I wonder how the network in your school is? If everyone has their own account and password, you'd better buy a switch. If you want to access the wireless network, you need to buy a wireless router, but the bandwidth, account number and price of the school need to be based on your own needs. If you don't have an account and password, you can surf the Internet directly through the connection port. In this case, it is more convenient to use a wireless router. The wireless router can only be used as a switch (that is, the access network cable can only be connected to one of the router's four LAN ports), and the DHCP in the wireless router needs to be turned off. The TCP/IP attribute in the local connection of the computer is changed to automatic acquisition. If the school provides each student with a fixed ip, then the wireless router needs to use one of your fixed ip addresses. At this time, the DHCP of the wireless router will be enabled and the router will automatically assign you an ip address.