The Cisco Catalyst 4948E Ethernet Switch is built from the start to deliver class-leading, full-featured server-access switching. The switch offers forty-eight 10/100/1000 Gbps RJ45 downlink ports & four 1/10 Gigabit Ethernet uplink ports & is designed to simplify data center architecture & operations by offering service provider-grade hardware & software in a one Rack Unit (1RU) form factor optimized for full-featured Top-of-Rack (To R) data center deployments.