The ec2000s 2 port gigabit expresscard ethernet adapter adds 2 101001000mbps ethernet ports to an expresscard enabled laptop or small form factor system enabling you to connect to two separate physical networks simultaneously with dedicated bandwidth or providing full dedicated bandwidth to virtual machines supporting features such as ndis5 checksum and large send offload for lower cpu utilization wake on lan wol and remote wake up power management jumbo frames and vlan tagging thi