Which security component is capable of inspecting content beyond headers?

• A. Application Firewall
• B. Firewall
• C. Router
• D. Switch

Answer: (A)

Inspecting content beyond headers relies on looking into the actual data carried by the application protocol, not just the routing or transport information. An application firewall is built to understand and enforce security at the application layer, decoding the payload of protocols like HTTP, SMTP, or FTP and inspecting the data inside. This deep packet inspection lets it spot malicious patterns, hidden payloads, or policy violations inside the content—things headers alone can’t reveal. Traditional firewalls mainly examine headers and some session state, while routers and switches focus on forwarding decisions at lower layers and don’t analyze the payload for security purposes. So, the component capable of inspecting content beyond headers is the application firewall.