USB-to-Ethernet adapters add an RJ45 port for wired internet to laptops, ultrabooks, MacBooks, or tablets that lack a built-in LAN port or have one that has failed. The adapter connects via USB-A or USB Type-C, and drivers for Windows 10/11 and macOS typically install automatically.
How to choose. For plans up to 100 Mbps, a 10/100 Mbps adapter is sufficient. For gigabit internet or fast network file transfers, get a gigabit adapter (1000 Mbps) with USB 3.0 or Type-C: via a USB 2.0 port, speed will be limited to approximately 300 Mbps. For MacBooks and new laptops without standard USB ports, a Type-C to RJ45 adapter is more convenient.