The PCIe x1 Intel 82571 Quad-Port 1GbE RJ45 Network Card is a space-efficient and cost-effective solution for systems requiring multiple Ethernet ports in a compact form factor. Powered by dual Intel 82571 Gigabit Ethernet controllers, this card provides four independent 1GbE RJ45 ports, making it ideal for firewalls, routers, and virtualization platforms. Its PCIe x1 interface ensures broad compatibility with most systems, while advanced networking features offer reliable and flexible performance in demanding environments.