What is an important consideration when choosing a time period for collecting data to establish a baseline for interface utilization on a critical…

A network baseline establishes a standard for normal network performance. To be accurate and useful, this baseline must represent the full range of typical network activity. This includes periods of high usage (peak hours, month-end processing) and low usage (overnight, weekends). Capturing only one extreme would create a skewed perspective, leading to either missed problems (if the baseline is too high) or excessive false alarms (if the baseline is too low). A representative view ensures that anomaly detection is effective and meaningful.

A. Selecting the lowest traffic volume would create an inaccurate baseline, causing normal peak traffic to be flagged as an anomaly.

B. The financial year is a business metric and typically does not align with the cyclical, operational patterns of network traffic.

D. Limiting the time period for convenience sacrifices accuracy; a proper baseline requires sufficient data to identify recurring patterns.

1. Cisco. (2009). End-to-End QoS Network Design: Quality of Service in LANs, WANs, and VPNs. Cisco Press. In Chapter 2, "The Need for a QoS Strategy," the concept of baselining is introduced, emphasizing the need to understand traffic patterns, including peaks, to properly provision network resources.

2. Cisco. (2021). Cisco DNA Center User Guide, Release 2.2.2, Network Baselines. Section: "About Network Baselines". This guide explains that Cisco DNA Center computes baselines by learning the network's behavior over time to determine what is "normal," which inherently requires observing the full range of traffic variations.