Implementing incident escalation procedures is the best way to ensure that an incident receives attention from appropriate personnel in a timely manner, because it defines the roles and responsibilities, communication channels, and escalation criteria for handlingdifferent types of incidents34. Incident escalation procedures help to prioritize and coordinate the response efforts and ensure that the incident is resolved by the most qualified and authorized personnel. Completing the incident management log, broadcasting an emergency message, and requiring a dedicated incident response team are not sufficient to ensure that an incident receives attention from appropriate personnel in a timely manner, because they do not specify how to escalate the incident based onits severity, impact,or complexity. References: 3: CISA Review Manual (Digital Version), Chapter 6, Section 6.3.2 4: CISA Online Review Course, Module 6, Lesson 3

The chain of custody has not been documented is a finding that should be of greatest concern for an IS auditor reviewing a forensic analysis process of an organization that has suffered a cyber attack. The chain of custody is a record of who handled, accessed, or modified the evidence during a forensic investigation.
Documenting the chain of custody is essential to preserve the integrity, authenticity, and admissibility of the evidence in a court of law. The other options are less concerning findings that may not affect the validity or reliability of the forensic analysis process. References:
* CISA Review Manual (Digital Version), Chapter 7, Section 7.51
* CISA Review Questions, Answers & Explanations Database, Question ID 220

Transaction tagging is a technique by which transactions are marked with unique identifiers or headers and traced through the system using agents or sensors at each processing point1. Transaction tagging allows for continuous monitoring and analysis of transaction processing in a high-volume, real-time system by providing visibility into the performance, availability, and reliability of each transaction and its components1. Transaction tagging can also help to identify and isolate errors, bottlenecks, anomalies, and security issues in the system1.