10/100/1,000 auto-sensing Auto MDI-X ports; All RJ45 ports with Auto-MDIX (auto uplink) support; Supports NWAY auto-negotiation; Store & forward switching architecture; Full/half duplex operation; Supports 802.3x full control for full duplex mode & collision-based back pressure for half duplex mode; Supports up to 8,192 MAC address entries; Supports MAC address auto-learning & auto-aging; Includes 19 rack-mount brackets; 3-year warranty; 16 ports;