The usb21000s2 usb 20 to gigabit ethernet adaptor offers a reliable usb ethernet connection adding a single rj45 ethernet port to a usb enabled computer system with support for link speeds of 10 100 1000 mbps backward compatible with older usb 1x computer systems this compact and portable usb gigabit network adaptor offers an ideal desktop replacement network adaptor or laptop accessory with support for features such as jumbo frames vlan tagging and wake on lan wol the adaptor is su