CompTIA Security+ (SY0-501) — Question 738

Which of the following are methods to implement HA in a web application server environment? (Choose two.)

Answer options

• A. Load balancers
• B. Application layer firewalls
• C. Reverse proxies
• D. VPN concentrators
• E. Routers

Correct answer: A, B

Explanation

Load balancers distribute traffic across multiple servers, enhancing availability by preventing any single server from becoming a bottleneck. Application layer firewalls, while primarily for security, can also help maintain uptime by filtering traffic effectively. Reverse proxies, VPN concentrators, and routers do not directly contribute to high availability in the same manner.