28-Port 2.5G Layer 2 Standard Smart Switch Dms-1250-28 24 Ports 2.5Ge For Downlink 4 Ports 10G Sfp+ For Uplink 6Kv Surge Protection On All 2.5G Ethernet Ports Support Lacp 802.3Ad Link Aggregation Support Static Routing Support 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