A Certificate Signing Request (CSR) is a request sent to a certificate authority (CA) to issue an SSL certificate. The CSR contains information like the public key, which will be part of the certificate.

The lessons learned phase of an incident response process involves reviewing the incident and generating reports. This phase helps identify what went well, what needs improvement, and what changes should be made to prevent future incidents. Documentation and reporting are essential parts of this phase to ensure that the findings are recorded and used for future planning.
* Recovery focuses on restoring services and normal operations.
* Preparation involves creating plans and policies for potential incidents, not reporting.
* Containment deals with isolating and mitigating the effects of the incident, not generating reports.

HTTP headers can be used to mitigate risks associated with Cross-Site Scripting (XSS). Security- related HTTP headers such as Content Security Policy (CSP) and X-XSS-Protection can be configured to prevent the execution of malicious scripts in the context of a web page. XSS (Cross-Site Scripting): A vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. HTTP headers like CSP help prevent XSS attacks by specifying which dynamic resources are allowed to load.
SQLi (SQL Injection): Typically mitigated by using parameterized queries and input validation, not HTTP headers.
DoS (Denial of Service): Mitigated by network and application-level defenses rather than HTTP headers.
SSL (Secure Sockets Layer): Refers to securing communications and is not directly mitigated by HTTP headers; rather, it's implemented using SSL/TLS protocols.

This option addresses the 50% memory utilization baseline, provides scalable storage, and typically includes built-in redundancy to handle single circuit failures. IaaS providers offer flexible resource allocation, easy scalability, and robust infrastructure with multiple layers of redundancy.