Palo Alto Networks (PANW) Certified Cybersecurity Entry-level Technician (PCCET) Practice Exam

What is the primary function of an application firewall?

1. Inspecting packets

2. Filtering web traffic

3. Encrypting data

4. Managing user access

The correct answer is: Filtering web traffic

The primary function of an application firewall is to filter web traffic. This type of firewall operates at the application layer of the OSI model, allowing it to monitor and control the input and output of data to and from applications. It does this by inspecting the data packets that are entering or leaving an application and comparing them against a set of predefined rules to determine whether to allow or block the traffic. By filtering web traffic, an application firewall can block malicious content, such as cross-site scripting attacks, SQL injection attempts, and other threats that specifically target applications. Unlike traditional firewalls that primarily focus on network traffic at the transport layer, application firewalls provide more granular control and protection tailored to the specific protocols being used by web applications. This capability is essential for maintaining the security and integrity of sensitive data exchanged over the internet. In contrast, inspecting packets refers to the function of network firewalls or intrusion detection systems, which work more on a broader scope. Encrypting data pertains to securing data in transit or at rest, while managing user access focuses on controlling who can access specific resources or information, rather than filtering traffic itself. This highlights why filtering web traffic is considered the core function of an application firewall.