Extreme Networks 5520-VIM-4X 10GBase-X SFP+ Port Switch The ExtremeSwitching 5520 Series is a family of high-performance, feature-rich edge and aggregation switches designed for the next generation digital enterprise. The 5520 Series universal hardware provides end-to-end secure network segmentation, in addition to advanced policy capabilities, and offers a user-selectable choice of Extreme’s flagship switch operating systems. This makes the 5520 a uniquely flexible platform that can be deployed across a range of edge, aggregation and wiring-closet environments. The 5520 further supports 10G and 25G modular uplinks for flexible linkage to other switches or devices over a range of media.