What is the main function of a Web Application Firewall WAF

What is the main function of a web application firewall waf - CompTIA Server+ SK0-005

Question

What is the main function of a Web Application Firewall (WAF) in server security?

Answers

To manage server storage
To balance network traffic
correct

To protect web applications by filtering and monitoring HTTP traffic
To encrypt web communications

Explanation

Correct Answer: C. To protect web applications by filtering and monitoring HTTP traffic

A Web Application Firewall (WAF) is specifically designed to protect web applications by filtering, monitoring, and analyzing HTTP traffic between a client and a web server.

It helps block malicious requests such as SQL injection, cross-site scripting (XSS), and other web-based attacks. By inspecting traffic at the application layer, a WAF provides targeted protection that traditional firewalls and intrusion detection systems often miss, making it essential for server security.

Why Other Options Are Incorrect :

A. To manage server storage: This is not the function of a WAF. Managing server storage involves tools like RAID controllers or storage management software, not firewalls. A WAF operates at the application layer, not at the hardware or storage management level.
B. To balance network traffic: Load balancers perform network traffic distribution, not WAFs. While both may sit in-line with web traffic, the WAF’s role is to inspect and filter malicious HTTP traffic, not to distribute loads across multiple servers.
D. To encrypt web communications: Encryption of web communications is typically handled by SSL/TLS protocols, not by a WAF. Although WAFs can inspect encrypted traffic when integrated with SSL offloading, their core function is not encryption but traffic inspection and threat mitigation.

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