What is the fine-grained topic of the following text: Imperva Incapsula integrates three effective web solutions – a Web Application Firewall (WAF), a DDoS mitigation service, and a content delivery network (CDN) — into a single cloud-based service that ensures malicious traffic is blocked before reaching Websites, and legitimate traffic is accelerated – creating a more secure, more enjoyable experience for Website visitors. Only return the topic.
Imperva Incapsula's integrated web solutions for traffic security and acceleration