Final answer:
To conduct a technical vulnerability scan of a Linux host, Nessus is the correct tool among the options listed. Nessus specializes in scanning for vulnerabilities and improving security postures.
Step-by-step explanation:
The program you could use to conduct a technical vulnerability scan of a Linux host is C) Nessus. Nessus is a widely used cybersecurity tool designed for vulnerability assessment and management. It scans for vulnerabilities, misconfigurations, and potential areas of improvement for security posture.
Its comprehensive database allows it to detect a wide range of vulnerabilities that could be exploited by attackers.
Options like A) Wireshark and D) SSH serve different purposes. Wireshark is a network protocol analyzer, not a vulnerability scanner, and SSH (Secure Shell) is a cryptographic network protocol used for operating network services securely over an unsecured network.
B) Metasploit is also a useful tool for security testing but it is more about exploiting vulnerabilities rather than finding them. Lastly, E) Apache Tomcat is a web server and servlet container, not a scanning tool.