The HP 811546-B21 is a versatile Ethernet adapter featuring four 1Gb ports, designed to provide high-density, server-grade network connectivity for HP servers. This PCI Express-based network interface card (NIC) includes both high profile (HP) and low profile (LP) brackets, making it suitable for installation in a wide range of server chassis, from rack-mounted to tower form factors. It is engineered to meet the demanding data center environments, offering reliable performance for various applications such as virtualization, high-speed data transfer, and server consolidation. With support for advanced networking features such as VLAN tagging, Jumbo frames, and load balancing, this adapter enables efficient network traffic management and enhances overall system performance. The inclusion of both HP and LP brackets provides the flexibility needed for use in different server setups, ensuring broad compatibility and ease of installation.