The D-Link DSL-2640B is a wireless ADSL2+ router with four Ethernet ports and support for WPA/WPA2 wireless encryption protocols. It features built-in firewall protection, Quality of Service (QoS) for prioritizing internet traffic, and an easy-to-use web-based interface for setting up and managing the router. The DSL-2640B also includes a USB port for connecting a printer or external hard drive to the network.

The DSL-2640B 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.