Route application traffic across server resources while maintaining a 12 Gbps application-delivery capacity tier. Cisco RD-5424SL-12G-S aligns the Alteon D-5424SL platform with a Secure configuration for deployments that require both load distribution and security-aware traffic handling at the application edge. It gives network architects a dedicated application delivery point rather than placing traffic-management functions directly on individual servers. Place the appliance between clients and application services where a central point for session direction and traffic policy handling is required. The 12G designation matters when sizing the platform against aggregate application flows, especially where multiple services share the same delivery tier. Its Secure designation identifies a configuration intended for environments where application traffic handling and security policy requirements are considered together. D-5424SL identifies the appliance platform, while the complete ordering code identifies the Secure 12G configuration. This distinction helps separate the platform reference used in architecture documentation from the exact configuration selected for deployment. Capacity planning should account for the stated 12 Gbps tier, expected concurrent application demand, traffic direction, and the security functions assigned to the appliance.