Lite Layer 3 stackable managed switches for enterprise and metro Ethernet access networks4 x SFP ports2 x 10GBASE-T and 4 x 10G SFP+ ports provide all the uplink capacity your network needsPremium L2 and L3 features effortlessly improve network efficiency and reduce unnecessary data transferHigh redundancy features to provide professional-grade reliability and a longer product life:Dual power inputsEthernet Ring Protection Switching with <50ms recovery time6 kV surge protection protects the device and those connected from unexpected surges802.1d/w/s Spanning Tree Protocol avoids potentially network crippling loopsRIP/RIPng and OSFPv2/v3 dynamically maps out your network, aiding data to get to its destination via the fastest route possibleA formidable PoE budget of 370W allows powering of numerous external devices (further expandable to 740W)Expand capacity in a flash with physical stacking up to 9 units80 Gbps per device physical stacking bandwidthSmart Fan self-adjusts accordingly to maintain optimal operating temperatures