The USB32000SPT USB (Universal Serial Bus) 3.0 to Dual Port Gigabit Ethernet Adapter lets you add two Gigabit Ethernet ports to your laptop or Ultrabook™ computer through a single USB (Universal Serial Bus) 3.0 port, & features an integrated USB (Universal Serial Bus) 3.0 pass-through port that keeps your USB (Universal Serial Bus) port available for use with external storage or other peripherals. Each RJ45 port supports 10/100/1000 Mbps Ethernet & is fully compatible with IEEE 802.3i/u/ab standards. This 2-port USB (Universal Serial Bus) LAN adapter is a versatile solution for connecting to two separate physical networks simultaneously, leveraging the 5 Gbps speed of USB (Universal Serial Bus) 3.0 to provide dedicated gigabit bandwidth to each port. The dual USB (Universal Serial Bus) NIC is also ideal for providing dedicated physical network interfaces to virtual machine configurations. Great for IT administrators that require dual-homed or multi-homed host systems. The USB (Universal Serial Bus) 3.0 NIC supports IPv 4/IPv 6 packet Checksum Offload Engine (COE) & TCP large send offload to reduce the load on your CPU, as well as Jumbo Frames, full-duplex operation with 802.3x flow control, & VLAN tagging for an efficient & full-featured USB (Universal Serial Bus) network adapter. The USB32000SPT USB (Universal Serial Bus) 3.0 to Dual Port Gigabit Ethernet Adapter lets you add two Gigabit Ethernet ports to your laptop or Ultrabook™ computer through a single USB (Universal Serial Bus) 3.0 port, & features an integrated USB (Universal Serial Bus) 3.0 pass-through port that keeps your USB (Universal Serial Bus) port available for use with external storage or other peripherals. Each RJ45 port supports 10/100/1000 Mbps Ethernet & is fully compatible with IEEE 802.3i/u/ab standards. This 2-port USB (Universal Serial Bus) LAN adapter is a versatile solution for connecting to two separate physical networks simultaneously, leveraging the 5 Gbps speed of USB (Universal Serial Bus) 3.0 to provide dedicated gigabit bandwidth to each port. The dual USB (Universal Serial Bus) NIC is also ideal for providing dedicated physical network interfaces to virtual machine configurations. Great for IT administrators that require dual-homed or multi-homed host systems. The USB (Universal Serial Bus) 3.0 NIC supports IPv 4/IPv 6 packet Checksum Offload Engine (COE) & TCP large send offload to reduce the load on your CPU, as well as Jumbo Frames, full-duplex operation with 802.3x flow control, & VLAN tagging for an efficient & full-featured USB (Universal Serial Bus) network adapter.