52-Port 10/100/1000Mbps Gigabit Stackable Smart Switch incl. 4 10G SFP+- 48 x 10/100/1000Mbps Auto-Negotiating Ports- 4 x 10G SFP+ ports- Physical Stacking up to 6 units per stack. Physical Stacking Bandwidth of 40G full duplex. Topology support Duplex Chain/Ring.- Switch Capacity 176bps- D-Link Green 3.0, 802.3az- Virtual Stacking Support up to 32 devices. Up to 20G stacking Bandwidth- Static route – IPv6 Management/Ready Logo- Half-/Full-Duplex, auto-negotiation, Auto MDI/MDIX- IEEE 802.3x Flow Control- 802.3ad Link Aggregation- Asymmetric VLAN, Auto Voice VLAN, GVRP- 802.1p priority queues- MAC/IP filtering- MAC/IP-based ACL- 802.1X port-base Access Control, Port Security, traffic segmentation- D-Link Safequard Engine- D-Link Network Assist, web based management, compact CLI- 19″ Rackmount Installation- Weight 2.4K