Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) — Question 111

At which layer is deep packet inspection investigated on a firewall?

Answer options

• A. internet
• B. transport
• C. application
• D. data link

Correct answer: C

Explanation

Deep packet inspection is performed at the application layer, allowing the firewall to analyze the actual content of the packets. The other layers, such as internet, transport, and data link, focus on different aspects of the data transmission and do not provide the same level of content analysis as the application layer.