Cybersecurity

WAF

/wæf/

Definition

Web Application Firewall — a security layer filtering HTTP traffic to block common attacks like SQLi, XSS, and DDoS.

Example in context

"The WAF blocked 10,000 SQL injection attempts during the attack — the database never saw a single request."

Related terms

Practice this term

Master WAF in context by working through exercises in the Cybersecurity module. You'll see the term used in real engineering scenarios with multiple-choice, fill-in-the-blank, and matching drills.

Frequently Asked Questions

What does "WAF" mean?

Web Application Firewall — a security layer filtering HTTP traffic to block common attacks like SQLi, XSS, and DDoS.

How do you pronounce "WAF"?

"WAF" is pronounced /wæf/.

Can you use "WAF" in a sentence?

"The WAF blocked 10,000 SQL injection attempts during the attack — the database never saw a single request."