The Cisco DNA Center Assurance interface provides tools to monitor network health, which includes viewing current and historical issues and alarms. When filtering this data, the user interface presents several predefined time ranges. The available options are typically the last 3 hours, the last 24 hours, and the last 7 days. The question asks for the maximum time range that can be viewed, which, according to the standard options provided in the interface, is 7 days. This allows administrators to analyze trends and investigate problems that have occurred over the past week.

A. 3 hours: This is a valid time-range option for viewing recent events, but it is the minimum predefined duration, not the maximum.

B. 24 hours: This is a standard and useful time range for daily analysis, but it is not the maximum available option.

C. 3 days: This is not a standard, predefined time-range option available in the Cisco DNA Center issues and alarms filter dropdown menu.

1. Cisco DNA Center User Guide

Release 2.3.5

"View Issues" Chapter. In the "Filter Issues" section

Step 3 explicitly states the available time range options: "From the Time Range drop-down list

choose the time range for which you want to view issues. You can view issues for the last 3 hours

24 hours

or 7 days." This confirms that 7 days is the maximum predefined selection.

2. Cisco DNA Center Assurance User Guide

Release 2.1.2

"Work with Issues" Chapter. The "Filter the List of Issues" section provides similar guidance: "In the Time Range field

click the down arrow and choose the time range for the issues you want to view (the last 3 hours

24 hours

or 7 days)." This corroborates the 7-day maximum across different versions of the software.