D-Link xStack 48-Port Gigabit L2+ Stackable Switch, Managed, L2+, Full duplex, 1U D-Link xStack 48-Port Gigabit L2+ Stackable Switch. Switch type: Managed, Switch layer: L2+. Basic switching RJ-45 Ethernet ports quantity: 48. Full duplex, Networking standards: IEEE 802.1p, IEEE 802.3, IEEE 802.3u, IEEE 802.3z. Form factor: 1U