NIST SP 800-61 r2 outlines a structured incident handling lifecycle composed of four phases: Preparation, Detection and Analysis, Containment, Eradication, and Recovery, and Post-Incident Activity. Detection and Analysis involve identifying and investigating incidents, while Post-Incident Activity focuses on lessons learned and evidence retention for future reference.
SP 800-61 Rev. 2, Computer Security Incident Handling Guide | CSRC, Computer Security Incident Handling Guide - NIST, We Read NIST SP 800-61 so You Don't Have to.

To analyze both payload and header information, an engineer must capture the full packet data. This includes all protocol and payload information for the traffic, allowing for a comprehensive analysis of the data being transmitted5678. References: Full packet capture is a common practice in network monitoring and security, as it provides detailed insights into the data transmitted over the network, including both payload and header information

* The security scenario involves protecting the company from known issues that trigger adware and addressing a recent incident that could harm the system.
* This scenario involves identifying vulnerabilities (weaknesses in the system that can be exploited) and threats (potential harm that can exploit these vulnerabilities).
* A vulnerability is an inherent flaw in the system, while a threat is an event or condition that has the potential to exploit the vulnerability.
* The security engineer needs to assess both the vulnerabilities present and the threats that could exploit these vulnerabilities to implement effective protection measures.
References
* Cisco Cybersecurity Operations Fundamentals
* Concepts of Vulnerability and Threat in Cybersecurity
* Best Practices in Vulnerability Management