24-port 10/100/1000 Gigabit Smart Switch + 4 SFP - 24 x 10/100/1000Mbps Auto-Negotiating Ports - 4x 1000Mbps SFP port - dlink|green 3.0, advance power saving features - 802.3az Energy Efficient Ethernet (EEE) port power save in idle mode - Half-/Full-Duplex, auto-negotiation, Auto MDI/MDIX - Jumbo frames up to 13000 bytes, 16K MAC-addresses - IEEE 802.3x Flow Control - 802.3ad Link Aggregation - Asymmetric VLAN, Auto Voice/Surveillance VLAN - Traffic Segmentation - 802.1p priority queues - MAC/IP filtering - MAC/IP-based ACL - 802.1X port-base Access Control, Port Security - D-Link Safequare Engine - IPv6 Ready - D-Link Network Assistant Utility (DNA) from firmware ver. 4.1, web based management, compact CLI, IPv6 Ready - D-View 6.0 support - 0-50°C operating temperature - 19" Rackmount Installation.