The HP 406740-B21 is a 1GB Ethernet Pass-Thru Module designed for seamless integration with the HP c7000 BladeSystem enclosure, providing an efficient and straightforward solution for network connectivity. This module enables up to 16 server blades housed within the c7000 enclosure to connect directly to an external network without the need for individual network interface cards (NICs) in each server. Each port on the module corresponds to a server blade, offering a dedicated and direct 1Gb connection that ensures optimal network performance and reduces the complexity of managing network configurations. This pass-thru module is ideal for environments that require high-speed Ethernet connectivity and where maintaining a simplified network infrastructure is crucial. Its design emphasizes ease of installation and minimal configuration, allowing for quick setup and integration into existing networks. The 1GB Ethernet Pass-Thru Module is a key component for businesses looking to maximize the networking capabilities of their HP c7000 BladeSystem, ensuring reliable and efficient connectivity for their server infrastructure.