24 x 10/100/1000BASE-T PoE ports 24 x 10/100/1000BASE-T ports 4 x SFP ports Supports IEEE 802.3at Power over Ethernet on ports 1 to 8 Supports IEEE 802.3af Power over Ethernet on ports 9 to 24 Comprehensive Layer 2 features including Link Aggregation, Port-based Q-in-Q, and VLAN trunking Enhanced network security with IP-MAC Port-Binding (IMPB), Access Control List (ACL), and IEEE 802.1X Embedded 6 kV surge protection, sub-50 ms recovery ERPS, and Dying Gasp provide optimal reliability