For Release 6.1(1), Cisco developed a variety of site models as standard architectures. These models were tested and optimized for maximum efficiency and performance. You can derive your network design by choosing the deployment model that most closely matches your business and then adding the specific features and applications that meet your business needs. Review the following information:
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Enterprise Tested Deployments and Site Models 
•Small and Medium Business Tested Deployments and Site Models
•Multisite Distributed Deployment Options