What does an application firewall do?

• A. Optimizes database performance
• B. Monitors and controls network traffic
• C. Regulates user access levels
• D. Enhances mobile application functionality

Answer: (B)

An application firewall serves a crucial role in securing applications by monitoring and controlling network traffic. It acts as a barrier between the application and the network, analyzing incoming and outgoing data packets to enforce policies that allow or block certain traffic based on security rules. This functionality is essential in protecting applications from various threats, including unauthorized access, data breaches, and attacks aimed at exploiting vulnerabilities in the application layer.

By filtering traffic at the application layer, an application firewall can provide a detailed level of monitoring that is more sophisticated than traditional network firewalls. This allows for the detection of malicious activities and the prevention of attacks such as SQL injection, cross-site scripting, and other application-layer threats, thereby enhancing the overall security posture of the application in use.