The best way to validate that appropriate security controls are in place to prevent data loss is to review compliance with data loss and applicable mobile device user acceptance policies. This will ensure that the organization has established clear rules and guidelines for employees to follow when connecting their personal devices to company-owned computers. A walk-through, a DLP tool configuration, and a security awareness training are not sufficient to validate the effectiveness of the controls, as they may not cover all possible scenarios and risks. References: IT Audit Fundamentals Certificate Resources

Deep packet inspection (DPI) is a core capability of data loss prevention (DLP) tools that allows the analysis of the content of data packets in transit. This helps detect the unauthorized movement of sensitive data by examining packet-level details.
* Network Traffic Logs (Option A):These provide historical data but do not actively detect data in transit.
* Data Inventory (Option C):Useful for identifying where sensitive data resides but not for monitoring its movement.
* Proprietary Encryption (Option D):Protects data but does not detect unauthorized transmission.
Reference:ISACA CISA Review Manual, Job Practice Area 4: Protection of Information Assets.

The major advantage of automating internal controls is to efficiently test large volumes of data, because automated controls can perform repetitive tasks faster, more accurately, and more consistently than manual controls. Automated controls can also provide audit trails and exception reports that facilitate the monitoring and evaluationof the control effectiveness12. Reviewing large value transactions, identifying transactions with no segregation of duties, and performing analytical reviews are possible benefits of automating internal controls, but not the major advantage. References: 1: CISA Review Manual (Digital Version), Chapter 5, Section 5.2.2 2: CISA Online Review Course, Module 5, Lesson 2

The most important determining factor when establishing appropriate timeframes for follow-up activities related to audit findings is the remediation dates included in management responses. The IS auditor should ensure that the follow-up activities are aligned with the agreed-upon action plans and deadlines that management has committed to in response to the audit findings. The follow-up activities should verify that management has implemented the corrective actions effectively and in a timely manner, and that the audit findings have been resolved or mitigated.
The other options are less important factors for establishing timeframes for follow-up activities:
* Availability of IS audit resources. This is a practical factor that may affect the scheduling and execution of follow-up activities, but it should not override the priority and urgency of verifying management's corrective actions.
* Peak activity periods for the business. This is a factor that may affect the availability and cooperation of auditees during follow-up activities, but it should not delay or postpone the verification of management' s corrective actions beyond reasonable limits.
* Complexity of business processes identified in the audit. This is a factor that may affect the scope and depth of follow-up activities, but it should not affect the timeframe for verifying management's corrective actions.