Sustain high-density fiber connectivity with the ExtremeSwitching 5520-48SE, built for enterprise access and aggregation environments that demand secure throughput and room to grow. With 48 1000BASE-X SFP ports, it fits cleanly into fiber-rich deployments where copper access switches fall short. MACsec capability adds a security layer for traffic that must stay protected across the switching fabric, while stacking support helps simplify management and scale as port demand increases. The platform also includes two unpopulated stacking/QSFP28 positions and one unpopulated VIM slot, giving network teams a path for expansion without replacing the core switch. This model is a strong fit when you need more than basic port count. It is designed for teams that value operational consistency, secure segmentation, and a chassis that can adapt to changing uplink and service requirements. For infrastructure groups standardizing on fiber access, the 5520-48SE offers the density and control expected in higher-value enterprise switching.