The Dell Force10 S-Series S55 1/10 GbE top-of-rack (ToR) switch is optimized to lower operational costs while increasing scalability and improving manageability at the network edge. Designed for high-performance data center applications, the S55 leverages a non-blocking architecture that delivers line-rate, low-latency L2 and L3 switching to eliminate network bottlenecks.The high-density S55 design provides 48 GbE access ports with up to four modular 10GbE uplinks in just 1-RU to conserve valuable rack space. The S55 incorporates multiple architectural features that optimize data center network efficiency and reliability, including reversible front-to-back or back-to-front airflow for hot/cold aisle environments and redundant, hot-swappable power supplies and fans. The S55 is a “scale-as-you-grow” ToR solution that is simple to deploy and manage. Up to eight S55 switches can be stacked to create a single logical switch by utilizing Dell Force10’s VirtualScale technology and high-speed stacking modules.