© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Module Summary VPNs enable network connectivity for an organization, its business partners, and customers over a shared infrastructure, delivering the same policies as a private network. Using Internet transport, site-to-site VPNs often reduce WAN costs and can be easily and quickly extended to new locations and business partners. To fully realize the benefits of high-performance remote-access VPNs, an organization needs to deploy a robust, highly available VPN solution to their mobile and remote authorized users.