The Netcomm 3G21WB is a wireless router that offers 3G connectivity, allowing users to access the internet from anywhere with cellular signal. It supports up to 32 Wi-Fi devices and features a built-in firewall for security. The device also includes four Ethernet ports for wired connections and a USB port for sharing files or connecting external devices. The Netcomm 3G21WB is ideal for home or small office use and offers easy setup and management through a web-based interface.

The 3G21WB is a router manufactured by the company Netcomm that allows multiple devices to connect to a network and communicate with each other. It works by receiving data packets from devices and forwarding them to their intended destination. The router is assigned a unique IP address , which serves as its identifier on the network.

To access the router's settings and configure its functions, users can log in using a web browser and their and . Once logged in, users can customize various settings such as network name, password, and security protocols. They can also set up parental controls, prioritize bandwidth usage, and monitor network activity.