TRENDnet's TW100-S4W1CA 4-port DSL/Cable Modem Internet Station provides the easiest and securest way to share your high-speed cable/xDSL Internet connection. It has four 10/100Mbps half/full duplex switch ports that provide direct connection to workstations or uplinks to other hubs or switches. It allows up to 128 users to access the Internet through the same ISP account. By sharing just one TW100-S4W1CA, one IP address, and one cable/xDSL modem, dozens of network users can surf the Internet at the same time. The TW100-S4W1CA also functions as a firewall for your network, protecting your computers from hackers. TRENDnet's DSL/Cable Modem Internet Station is a feature-rich product that provides cost saving functions and easy configuration.