Which type of single unified engine will get this result?

An administrator needs to add capability to perform real-time signature lookups to block or sinkhole all known malware domains.

Which type of single unified engine will get this result?
A . User-ID
B. App-ID
C. Security Processing Engine
D. Content-ID

Answer: D

Explanation:

Content-IDTM combines a real-time threat prevention engine with a comprehensive URL database and elements of application identification to limit unauthorized data and file transfers and detect and block a wide range of exploits, malware, dangerous web surfing as well as targeted and unknown threats.

https://www.paloaltonetworks.com/content/dam/pan/en_US/assets/pdf/tech-briefs/techbrief- content-id.pdf