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Use the Cisco Catalyst 16-ports plug-in ethernet module (6500) to serve all of your data center needs. The Ethernet module is compatible with RJ-45 connectors and provides a working distance of 100 meters. In addition, its fiber module supports pluggable optics and provides an operational distance of up to 50 miles over single mode fiber and 300 meters over multimode fiber respectively. In addition, it allows you to operate the 4 port groups of 4 ports each in two main modes: oversubscription and performance modes. The latter involves using 2 to 4 ports per port group while the former involves using 1 port per port group. This provides you with the flexibility of using some ports for server connections and other ports for interconnection of switches.