The WS-C3750X-24T-E is a Cisco Catalyst 3750X enterprise-class stackable switch featuring 24 Gigabit Ethernet 10/100/1000 ports with IP Services licensing. The part number suffix "-9X5X4" appears to reference a hardware maintenance service contract tier (9x5x4 coverage). This product listing indicates a maintenance/support service offering rather than the switch hardware itself.
24 x Gigabit Ethernet 10/100/1000 ports
Layer 3 managed switch with IP Services
1 AC Power Supply 350W, second slot for optional redundant power
160 Gbps switching fabric
1RU rack-mountable form factor (1.75 x 17.5 x 18.0 inches)
StackWise Plus technology (supports up to 9 switches)
4 optional uplink modules (GE/10GE ports)
256 MB DRAM, 64 MB Flash
