Proxy firewall filters are used at which layer?
2022
Proxy firewall filters are used at which layer?
- A.
Network layer
- B.
Session layer
- C.
Presentation layer
- D.
Application layer
Attempted by 295 students.
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Correct answer: D
Answer: Proxy firewall filters at the Application Layer (Layer 7). A proxy firewall acts as an intermediary between clients and servers and inspects application-layer data. It understands application protocols and can allow or block traffic based on protocol semantics and message content. Examples of what it inspects: HTTP requests (URLs, headers, cookies), FTP commands, SMTP messages.