D-Link 16-Port 10/100 Unmanaged Desktop Switch, Fanless Rackmount (DSS-16+/RE) (Certified Refurbished) Auto speed sensing to automatically adjust for optimal performance Auto negotiation (full or half duplex) allows the switch to automatically negotiate and run the highest supported transmission rate Non-blocking wire-speed architecture with a 3.2 Gbps switching capacity Wire-speed filtering and store-and-forward switching maximizes network performance while minimizing the propagation of bad network packets Plug and Play