Certified Information Systems Auditor (CISA) — Question 1232

A firewall has been installed on the company's web server. Which concern does the firewall address?

Answer options

• A. Accessing information by the outside world
• B. Availability of the information
• C. Connectivity to the Internet
• D. Unauthorized modification of information by internal users

Correct answer: A

Explanation

The firewall primarily protects against unauthorized access from external sources, thus managing who can access the information. While availability and connectivity are important, they are not the primary focus of a firewall, and the modification of information by internal users is typically controlled by different security measures.