Application Layer Firewalls operate at the:

The correct answer is A. OSI protocol Layer seven, the Application Layer. Since the application layer firewall makes decisions based on application-layer information in the packet, it operates at the application layer of the OSI stack. "OSI protocol layer 6, the presentation layer" is incorrect. The application layer firewall must have access to the…

Submitted by brentm· Apr 18, 2026Network and Communications Security

Question

Options

AOSI protocol Layer seven, the Application Layer.
BOSI protocol Layer six, the Presentation Layer.
COSI protocol Layer five, the Session Layer.
DOSI protocol Layer four, the Transport Layer.

How the community answered

(27 responses)

A
93% (25)
B
4% (1)
D
4% (1)

Explanation

Since the application layer firewall makes decisions based on application-layer information in the packet, it operates at the application layer of the OSI stack. "OSI protocol layer 6, the presentation layer" is incorrect. The application layer firewall must have access to the application layer information in the packet and therefore operates at the application "OSI protocol layer 5, the session layer" is incorrect. The application layer firewall must have access to the application layer information in the packet and therefore operates at the application "OSI protocol layer 4, the transport layer" is incorrect. The application layer firewall must have access to the application layer information in the packet and therefore operates at the application

Topics

#Firewalls#OSI Model#Application Layer#Network Security Devices

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