D Link DGS-3130-30S 30-Port Lite Layer 3 Stackable Managed Switch

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4 x SFP ports
2 x 10GBASE-T and 4 x 10G SFP+ ports provide all the uplink capacity your network needs
Premium L2 and L3 features effortlessly improve network efficiency and reduce unnecessary data transfer
High redundancy features to provide professional-grade reliability and a longer product life:Dual power inputs
Ethernet Ring Protection Switching with <50ms recovery time
6 kV surge protection protects the device and those connected from unexpected surges
802.1d/w/s Spanning Tree Protocol avoids potentially network crippling loops
RIP/RIPng and OSFPv2/v3 dynamically maps out your network, aiding data to get to its destination via the fastest route possible
A 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 units
80 Gbps per device physical stacking bandwidth
Smart Fan self-adjusts accordingly to maintain optimal operating temperatures