The CCR2004 PCIe NIC is a unique networking product that combines a 2x 25 Gigabit PCIe Ethernet adapter with the full capabilities of a MikroTik Cloud Core Router (CCR). It features four virtual Ethernet interfaces, including two in passthrough mode for the 25G SFP28 cages and two bridged with the Gigabit Ethernet port for management. Powered by a quad-core ARMv8 CPU, 4 GB RAM, and 128 MB NAND storage, it can handle tasks like firewalls, user management, and traffic control directly within the server. The card supports wire-speed (100Gbps) performance with Jumbo frames, but requires a PCIe device initialization delay due to its boot time. This makes it a versatile solution for integrating high-speed networking and routing capabilities into your server setup.