A security analyst is conducting a penetration test for an online store with a database server. Which of the following tools would best assist the tester in detecting vulnerabilities on that server?

Burp Suite is primarily a web application security testing tool used for intercepting, modifying, and replaying HTTP requests, not for general server vulnerability scanning.

Nessus is a widely recognized vulnerability scanner that can identify a vast array of security misconfigurations, missing patches, and known vulnerabilities on various server types, including database servers. It performs authenticated and unauthenticated scans to detect issues beyond just web application flaws, making it ideal for a comprehensive server-side assessment.

Nikto is a web server scanner specifically designed to find vulnerabilities and misconfigurations in web servers, not general database server vulnerabilities.

SQLmap is an SQL injection tool specifically designed to automate the detection and exploitation of SQL injection flaws in web applications that interact with databases, not for broad vulnerability scanning of the database server itself.