Be sure to refer to the OSI model while thinking about organizational needs as they apply to the following questions: Discuss when performance baselines should be taken, and how they should be used to make improvements. For example, in a large network, when would be a good time to take an accurate baseline of typical performance, at 9 to 11 AM or 2 to 4 AM? Should you take multiple baselines in order to understand when your peak usage periods are? When should a baseline be updated?