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For this session of Operations Security we discuss Clustering, and how multiple nodes are able to function as single logical entity, and where passive server and load balancing comes into play. We'll discuss and clarify the function and purpose of UPS uninterrupted power supply and the ways in which is should NOT be used. You'll review the four types of Backups, discuss in detail how the backup system is structured, the differences among them, when/how each is used, and the advantage each one has over another based upon a specific need or goal.