The evolution to the virtualized network meets the increasing demands in server utilization and availability within the business today. The XGS4700 and XGS4500 Series compliments the network infrastructure of virtualization as both Series deliver not only robust, reliable enterprise-class L2/L3 switch features but are also designed to accomplish high-availability routing for better utilization of network bandwidth. The ZyXEL XGS4700 Series consists of two models: XGS-4728F and XGS4700-48F. The XGS-4728F offers 24 dual-personality 1000BASE-T copper/SFP fiber ports, 2 built-in 12G Gigabit CX4 stacking interfaces and 1 open slot for the optional 10G Gigabit EM-422/412 uplink module which supports up to 2 10G transceivers. The XGS4700-48F offers 48 SFP Gigabit Ethernet ports plus 2 open slots for 2 10G Gigabit EM-422/412 uplink modules which support up to 4 10G transceivers. The ZyXEL XGS4500 Series consists of two models: XGS-4528F and XGS-4526. Similar to the XGS-4728F, the XGS-4528F offers 24 Gigabit dual-personality ports along with 2 built-in 12G Gigabit stacking interfaces and 1 open slot for the optional 10G Gigabit EM-422/412 uplink module which supports up to 2 10G transceivers, while the XGS-4526 provides 20 Gigabit Ethernet ports, 4 Gigabit dual-personality ports and 1 open slot for the optional 10G Gigabit EM-422/412 uplink module which supports up to 2 10G transceivers...