NETGEAR ProSafe™ 48 Port 10/100 L3 Managed Stackable Switch with 4 Gigabit Ports & PoE, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z, 1000BASE-T, 100BASE-TX, 10BASE-T, 17.6 Gbit/s, 1 Gbit/s, 0.122 MB, Ethernet, Fast Ethernet, Gigabit Ethernet NETGEAR ProSafe™ 48 Port 10/100 L3 Managed Stackable Switch with 4 Gigabit Ports & PoE. Basic switching RJ-45 Ethernet ports quantity: 52. Switching capacity: 17.6 Gbit/s. Networking standards: IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z