The D-Link DSL-520B ADSL2+ Modem Router is super-handy piece of hardware that serves as both your ADSL modem and wired router. With a built-in RJ-11 ADSL port, this device connects to your ADSL, ADSL2, or ADSL2+ line. If you have an ADSL2+ line, you can transfer data a rate of up to 24Mbps downstream and up to 2Mbps upstream. Beyond use as your modem, this device also features an RJ-45 Fast Ethernet LAN port for routing your Internet connection to your computer. As a wired router, the device also has more advanced functions such as firewall protection for network security and Quality of Service bandwidth prioritization for keeping your latency-sensitive applications, like VoIP or online gamines operating smoothly. This device is compatible with Windows, Mac and Linux operating systems.