The HP 684217-B21 is an Ethernet 1GB 4-Port 366FLR FlexLom Adapter that offers high performance and reliability for HP servers. Designed specifically for use in HP ProLiant Rack and Tower servers, this adapter provides four 1Gb Ethernet ports, allowing for increased network throughput and redundancy. The FlexLom form factor ensures seamless integration with the server's motherboard, eliminating the need for additional PCIe slots and thereby saving valuable server resources. This adapter is ideal for virtualization, security, server consolidation, network segmentation, and other applications requiring high bandwidth and network interface redundancy. It supports advanced features such as VLAN tagging, Jumbo Frames, PXE boot, and Wake on LAN (WoL), among others. The HP 366FLR is built with the quality and reliability that HP is known for, ensuring a stable and secure network environment for your business.