Which process on a firewall makes permit/deny forwarding decisions based solely on address and
service port information?

A.
Circuit Proxy

B.
Stateful Packet Inspection Proxy

C.
Application Proxy

D.
Transparency Proxy

Explanation:
Circuit-level proxy creates a circuit between the client computer and the server. It does not
understand or care about the higher-level issues that an application-level proxy deals with. It knows
the source and destinations addresses and makes access decisions based on this information…IT
looks at the data within the packet header versus the data within the payload of the packet. It does
not know if the contents within the packet are actually safe or not. – Shon Harris All-in-one CISSP
Certification Guide pg 419-420