RJ-45 interface is the most common network interface and belongs to twisted-pair Ethernet interface type. It is not only used for the most basic 100base-T Ethernet, but also for the mainstream 100Base-TX fast Ethernet and 1000Base-TX gigabit Ethernet. The RJ-45 interface looks exactly the same, like a flat "T". Connected to it is RJ-45 connector.
In order to lose weight, many thin and light laptops no longer have RJ45 network cable interface as standard. If you want to surf the Internet with zero delay, you can consider buying a docking station with USB-A network cable interface, and the products that support driver-free function under 100Mbs (100 Mbps network card) and Windows 10 systems are preferred, and the prices are mostly within 30 yuan.
Since USB-A can switch to wired network, it can naturally switch to wireless network card supporting Wi-Fi. Most models on the market can avoid driving, and also support the function of simulating AP (* * * enjoying wireless hotspots), which is suitable for desktops without wireless network cards or notebooks with wireless network cards.