The Linksys WRT54GC is a 54 Mbps router which provides quick, secure and high-speed wireless Internet access to multiple devices. Featuring wireless encryption, this Linksys wireless G router prevents unauthorized access to your wireless network. This 54 Mbps router supports MAC address filtering, which lets you authorize the IP addresses to be allowed in your network for preventing unauthorized access. The SPI firewall in this Linksys wireless G router provides robust wireless security from a wide array of common hacker attacks. Moreover, the four Ethernet ports in the Linksys WRT54GC facilitate the forming of multiple full-duplex wired connections for building a small wired network.