HP E5500 switches deliver premium levels of performance, security, and reliability for robust switching at the enterprise network edge. The series consists of Layer 2/3/4 Fast Ethernet and Power over Ethernet switches, with advanced features that can accommodate the most demanding applications. They offer resilient and secure connectivity and the latest traffic-prioritization technologies to optimize applications on converged networks. Designed for maximum flexibility and scalability, they come with 24 or 48 10/100 ports, plus four active SFP-based Gigabit Ethernet ports for stacking and uplinks. They can be stacked up to eight units high in one location-or distributed over several sites up to 70 km (43.5 miles) apart and connected via Gigabit links to form a virtual “”stack.”” One stack can provide up to 384 Fast Ethernet ports and may be managed centrally as a single-IP entity.