Firewalls and Filtering: WAF, UTM, Layer 4/Layer 7, Rate Limiting, and DLP (4.1)

This episode compares firewall and filtering technologies by focusing on what each control is designed to inspect, block, or allow. Traditional firewalls often filter traffic by addresses, ports, and protocols, while Layer 4 controls focus on transport-level details and Layer 7 controls inspect application-level content. A web application firewall protects web applications from attacks such as injection, malicious requests, and abnormal application traffic. Unified threat management combines several security functions into one platform, rate limiting reduces abuse by controlling request volume, and data loss prevention helps detect or prevent sensitive data from leaving approved channels. For the exam, students should choose filtering controls based on traffic type, attack pattern, and protection goal. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with. And dont forget Cyberauthor.me for the companion study guide and flash cards!