The D-Link DSL-3900 is a high-performance dual-band gigabit router that offers fast and reliable internet connectivity for homes and small businesses. It features dual-band technology for improved wireless speeds, four gigabit Ethernet ports for wired connections, and advanced security features to protect against online threats. The router also includes parental controls and QoS capabilities for managing network traffic and ensuring a smooth online experience for all users.

The DSL-3900 is a router manufactured by the company D-Link 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.