D-Link DUB-E100 Fast Ethernet Card - USB - 1 Port - External The D-Link DUB-E100 is a Hi-Speed USB 2.0 10/100Mbps Fast Ethernet Adapter which represents the simplest way to connect your computer to an Ethernet based network.Based on USB 2.0, the DUB-E100 extends the transfer speed of earlier USB Fast Ethernet adapters to true 10/100Mbps connectivity.