CFA-001 practice question 17 of 25
When collecting electronic evidence at the crime scene, the collection should proceed from the most volatile to the least volatile
Full set: 180 questionsDomain Computer Forensics Investigation Process
The statement is correct. The "Order of Volatility" (OOV) is a fundamental principle in digital forensics and incident response. It dictates that evidence collection must proceed from the most transient data to the most persistent. Volatile data, such as the contents of CPU registers and RAM, can be lost or altered in milliseconds or when a device loses power. Less volatile data, like files stored on a hard drive, persists even after a system is shut down. Adhering to the OOV maximizes the amount of evidence collected and preserves critical data that could be lost if a less volatile source, like a hard drive image, were prioritized.
B. False: This is incorrect. Reversing or ignoring the order of volatility would lead to the certain loss of critical, time-sensitive evidence, such as running processes, network connections, and memory contents.
1. Dominique, D. (2002). RFC 3227: Guidelines for Evidence Collection and Archiving. The Internet Society. Section 2.1, "Order of volatility," states, "In general, when collecting evidence you should proceed from the volatile to the less volatile." Available at: https://www.rfc-editor.org/rfc/rfc3227
2. Kent, K., Chevalier, S., Grance, T., & Dang, H. (2006). Guide to Integrating Forensic Techniques into Incident Response (NIST Special Publication 800-86). National Institute of Standards and Technology. Section 3.3.1, "Collecting Evidence," outlines the order of volatility from registers and cache (most volatile) to archival media (least volatile).
3. Carrier, B. (2005). File System Forensic Analysis. Addison-Wesley Professional. Chapter 3, "Computer Foundations," discusses the volatility of data in a computer system, emphasizing that memory (RAM) data is lost when power is removed, establishing the need for a specific collection order.
4. Casey, E. (2011). Digital Evidence and Computer Crime: Forensic Science, Computers, and the Internet (3rd ed.). Academic Press. Chapter 7, "Investigating Computer Intrusions," details the live response process, which is built around capturing volatile data first according to the order of volatility.
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