This document is a Double-Take ® application note. An application note provides guidelines on the use of Double-Take in a specific environment. This document contains: ! Document Overview —Explains what an application note contains, how it should be used, what you need to know before trying to use the application note, and where you can go for more information. ! Solution Overview —Explains how the application works with Double-Take and describes the considerations that you must weigh when implementing your Double-Take solution. Review this section to make sure that you understand the theory involved with using Double-Take and your application. Includes both basics, such as system requirements, as well as configuration and environment-specific topics, such as interactions with specific clients or special considerations for WAN (Wide Area Network) environments. Pay special attention to those topics that are directly related to your environment. ! Sample Implementation —Describes a specific example of how to use Double-Take for this solution. Use these procedures as a guideline for creating your own implementation.