CompTIA Security+ (SY0-601) — Question 628

Which of the following is the most important security concern when using legacy systems to provide production service?

Answer options

• A. Instability
• B. Lack of vendor support
• C. Loss of availability
• D. Use of insecure protocols

Correct answer: B

Explanation

The correct answer is B, as legacy systems often lack vendor support, which means there are no updates, patches, or assistance available to address security vulnerabilities. While instability, loss of availability, and insecure protocols are also concerns, the absence of vendor support significantly heightens the risk of unaddressed security flaws.