Network interface cards upgrade the machine to match the network: adding faster Ethernet to servers and workstations, fiber connectivity where copper cannot reach, and additional ports for virtualization, storage, and segmentation. The selection spans desktop and server NICs across the speeds and interfaces in current use.
Match three things: the slot in the machine, the connector on the network, and the speed on both ends. Server NICs deserve the extra check - slot generation and lane width limit real throughput, and multi-port cards need the lanes to feed them. On the network side, the card's interface must agree with the switch port and cabling it will meet, transceivers included where the card takes pluggable optics. Buying the NIC and its optics as one line item avoids the compatibility surprise. COLAMCO quotes network adapters for business, government, and education infrastructure, checked against both the servers and the switching they connect.