D-Link xStack DGS-3420-28PC - Switch - Managed - 24 x 10/100/1000 + 4 x combo Gigabit SFP + 4 x 10 Gigabit SFP+ - rack-mountable - PoE , HuntOffice.ie

Support for Duplex Chain/Ring topology for up to 12 physically stacked units as well as virtual stacking managed via a single IP provides flexibility and convenience, Innovative Safeguard Engine, ACL, and ARP Spoofing Prevention protect your network from malicious attacks and unauthorised access, A suite of D-Link Green Technology features help save energy automatically and reduce costs, without sacrificing performance,