Difficult depends on what management mechanism your school is. Generally, it is useless for you to plug in the switch in the distribution room directly. His central server will manage your port number. Even if you don't care about the port number, you have to charge. You have to use your student ID card to buy an Internet card and so on. You can try this method (not necessarily successful, it is basically a school announcement when it is found), buy a 4-port switch and a short network cable, find an Internet port (or try to plug it into the switch directly), unplug the network cable, connect the original port with your switch with your small network cable, and then plug the network cable you unplugged into the switch (if you don't unplug the network cable, you don't have to do this step). Then plug in the network cable you connected to the distribution room on your switch, so that this network cable may be online (depending on luck, depending on the network management mode of your school).