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By combining Cisco 12-port , 24-port and 48-port 4-Gbps Fibre Channel switching modules in a single , modular chassis , customers can design storage networks optimized for cost and performance in a wide range of application environments . The switches also can autodetect misconfigurations and suggest corrections . With increasing deployments of Multicast based applications , so too the need to secure the network against unauthorized Multicast sources from distributing content . Server clusters have unique operational requirements and should be served by a slightly different design approach . Cisco Catalyst 6500 Series chassis can be deployed in the wiring closet , the distribution and core layers , the data center , and the WAN edge , providing the power and features required for end-to-end deployment for the enterprise campus , the ISP network , and metro and research computing networks . Exult and the other outsourcers were able to secure their niches as a component of the broader economic cost cutting . Classification and reclassification can be based on criteria as specific as the source or destination IP address , source or destination MAC address , or the Layer 4 TCP or UDP port . Most share tips about favorite Web sites and pass along information about homework shortcuts and sites that are especially rich in content that fit their assignments . The Cisco Catalyst 3750 Series supports a comprehensive set of security features for connectivity and access control , including ACLs , authentication , port-level security , and identity-based network services with 802.1x and extensions .