The need for computer forensics is highlighted by an exponential increase in the number of cybercrimes and litigations where large organizations were involved. Computer forensics plays an important role in tracking the cyber criminals. The main role of computer forensics is to:

The fundamental role of computer forensics is to apply scientifically sound and legally accepted methodologies to investigate digital incidents. This involves the identification, preservation, extraction, analysis, and interpretation of digital data to reconstruct events. The ultimate goal is to produce factual, unbiased evidence that can be presented in a court of law or other formal proceedings to substantiate or refute claims about an attacker's actions. This process ensures that the findings are both reliable and admissible, serving as the factual basis for legal or disciplinary action.

A. The objective of any investigation is to be cost-effective. Maximizing costs is counterintuitive and financially irresponsible, undermining the viability of the forensic process.
B. Hardening perimeter security is a proactive cybersecurity function aimed at preventing incidents, whereas computer forensics is a reactive discipline focused on investigating incidents after they occur.
C. Documenting monitoring processes is an administrative, IT governance, or compliance task, not the primary investigative function of a computer forensics specialist.

1. Palmer, G. (2001). A Road Map for Digital Forensic Research. Technical Report DTR-T001-01, DFRWS. In Section 2, "Defining Digital Forensics," the report defines the discipline as the use of "scientifically derived and proven methods toward the preservation, collection, validation, identification, analysis, interpretation, documentation and presentation of digital evidence," which directly supports the process described in the correct answer.

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 2.3, "Forensic Process," outlines the core steps as collection, examination, analysis, and reporting of data to "re-create the events that occurred" and for presentation, aligning with the role of processing and interpreting evidence for legal purposes.

3. Carrier, B. D. (2005). File System Forensic Analysis. Addison-Wesley Professional. In Chapter 1, "Introduction," the text establishes that the purpose of a digital investigation is to "answer questions about digital states and events," with the results often being used in court, which frames the discipline around extracting and interpreting factual evidence.