HP BCM5720-2P N99038-001 is a PCIe network card that adds wired Ethernet connectivity to a compatible computer. HP identifies this exact part number as a Broadcom BCM5720-2P network interface card.
The card provides two 1GbE ports for connecting network cables. Its RJ45 connections support wired links to network equipment such as switches or routers, making it useful when a system needs two Ethernet connections through an expansion card.