Certified Information Systems Security Professional (CISSP) — Question 92

Which of the following implementations will achieve high availability in a website?

Answer options

• A. Disk mirroring of the web server with redundant disk drives in a hardened data center
• B. Disk striping of the web server hard drives and large amounts of bandwidth
• C. Multiple geographically dispersed web servers that are configured for failover
• D. Multiple Domain Name System (DNS) entries resolving to the same web server and large amounts of bandwidth

Correct answer: C

Explanation

Option C is correct because using multiple geographically dispersed web servers configured for failover ensures that if one server goes down, others can take over, thus maintaining availability. Option A, while it provides redundancy, does not protect against site-wide failures. Option B focuses on performance rather than availability, and Option D does not provide redundancy for the web server itself since it points to the same server.