Two gigabit SFP fiber optical ports and twenty-four gigabit PoE ports. IEEE standard 802.3at/af. The IEEE standards 802.3, 802.3u, 802.3x, 802.3ab, and 802.3z Protection against 6 KV surges for PoE ports PoE power control Access to gigabit networks Forwarding at wire speed Switching between stores and forwards solid shell of high-strength metal