28-Port 2.5G Layer 2 Standard Smart Poe Switch Dms-1250-28P 24 Ports 2.5Ge Poe For Downlink 4 Ports 10G Sfp+ For Uplink Poe Ieee802.3Af/At/Bt Options, Power Budget 475W 6Kv Surge Protection On All 2.5G Ethernet Ports Support Lacp 802.3Ad Link Aggregation Support Static Routing & Loopback Detection Support Spanning Tree Protocol(Stp/Rstp/Mstp) Aaa Support For Radius/Tacacs+ Support D-Link Safeguard Engine Manage Through The Nuclias Network Controller