Explanation
Lessons learned analysis is the best way to enable an organization to enhance its incident response plan processes and procedures because it helps to identify the strengths and weaknesses of the current plan, capture the feedback and recommendations from the incident responders and stakeholders, and implement the necessary improvements and corrective actions for future incidents. Security risk assessments are not directly related to enhancing the incident response plan, but rather to identifying and evaluating the security risks and controls of the organization. Information security audits are not directly related to enhancing the incident response plan, but rather to verifying and validating the compliance and effectiveness of the security policies and standards of the organization. Key performance indicators (KPIs) are not directly related to enhancing the incident response plan, but rather to measuring and reporting the performance and progress of the security objectives and initiatives of the organization. References:
https://www.isaca.org/resources/isaca-journal/issues/2017/volume-5/incident-response-lessons-learned
https://www.isaca.org/resources/isaca-journal/issues/2017/volume-1/security-risk-assessment-for-a-cloud-based-
https://www.isaca.org/resources/isaca-journal/issues/2016/volume-6/how-to-measure-the-effectiveness-of-inform
https://www.isaca.org/resources/isaca-journal/issues/2017/volume-3/how-to-measure-the-effectiveness-of-your-i

Section: INFORMATION SECURITY PROGRAM DEVELOPMENT
Explanation:
An extranet server should be placed on a screened subnet, which is a demilitarized zone (DMZ). Placing it on the Internet side of the firewall would leave it defenseless. The same would be true of placing it on the external router, although this would not be possible. Since firewalls should be installed on hardened servers with minimal services enabled, it would be inappropriate to store the extranet on the same physical device.

Explanation
A BIA is an important part of Disaster Recovery Planning (DRP). It helps identify the impact of a disruption on the organization, including the critical systems and processes that must be recovered in order to minimize that impact. The BIA results are used to prioritize system restoration and determine the resources needed to get the organization back into operation as quickly as possible.

Section: INFORMATION SECURITY PROGRAM MANAGEMENT