Network adapter is also known as network card or network interface card (NIC), English name NetworkInterfaceCard.Emulex network adapter core is the link layer controller, the controller is usually a single purpose-built chip that implements a number of link-layer services, which include framing, link access, traffic control, error detection and so on. A network adapter is a device that enables computers to be networked together, and what is commonly referred to as a network card is a network adapter that connects a PC to a LAN. Network Interface Card (NIC) inserted in the computer motherboard slot, is responsible for the user to pass the data converted to other devices on the network can recognize the format, through the network media transmission. Its main technical parameters for the bandwidth, bus mode, electrical interface mode.