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The Cisco VPN Services Adapter (VSA) for Cisco 7200 Series routers provides high-performance encryption and key-generation services for IP Security (IPsec) VPN applications. It increases performance over the existing VPN acceleration module (VAM). Like the VAM2+, the VSA supports Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES). It includes hardware acceleration for 128-, 192-, and 256-bit AES keys. This combination of security features and high performance offers a flexible, integrated approach to accommodate the most diverse enterprise or service provider network environments, while providing investment protection for existing Cisco 7200 Series router customers.