Explanation:

To detect and protect confidential documents, we need a custom rule to identify project codes that start with
999 (since they are classified as confidential).
Box 1: A Sensitive Info Type (SIT) allows Microsoft Purview DLP policies to recognize structured data (e.g., project codes). DLP policies require a sensitive info type to detect content based on patterns, keywords, or dictionary terms. A sensitivity label alone does not define detection logic-it is used for classification and protection after content is identified.
Box 2: Since project codes follow a structured 10-digit pattern, we should use a Regular Expression (Regex) to match project codes that start with 999.
Example Regex pattern:
999\d{7}
This pattern detects a 10-digit number starting with "999".

Explanation:

Explanation:
Box 1: Insider Risk Management policies in Microsoft Purview can be configured to detect risky behavior, such as accessing phishing websites. These policies monitor user activity, generate alerts, and help organizations investigate potential security threats.
Box 2: Microsoft Defender Browser Protection extension helps in detecting unsafe or phishing websites and integrating this detection with Insider Risk Management policies. This extension works with Microsoft Edge and Google Chrome to identify risky browsing activity and trigger alerts.

Explanation:

Activity Explorer logs a DLP rule match event each time any DLP rule condition is met on a file.
File1 matches Rule11 and Rule12 # 2 events
File2 matches Rule21 and Rule22 # 2 events
File3 matches Rule11 and Rule22 # 2 events
Total events in Activity Explorer = 2 + 2 + 2 = 6.
Microsoft notes that Activity explorer shows granular DLP activities such as policy rule matches per item.
The DLP incidents report aggregates by policy match per item, not by each rule in that policy. Multiple rules from the same policy on the same item count as one incident; if different policies match the same item, each policy creates its own incident.
File1: Rules from DLP1 only # 1 incident
File2: Rules from DLP2 only # 1 incident
File3: One rule from DLP1 and one from DLP2 # 2 incidents
Total incidents = 1 + 1 + 2 = 4.
References: Microsoft Purview DLP explains that Activity explorer records detailed DLP activities, while DLP incidents are created when a policy match occurs for an item, and multiple rule matches within a single policy are consolidated into a single incident for that item.