I agree with Tawna. The circuit-level gateway firewall is responsible for making routing decisions and controlling the flow of traffic at the network layer. It's not operating at the data-link, session, or transport layers.
This question is a bit tricky, but I think the answer is C) Network layer. The circuit-level gateway firewall operates at the network layer, filtering traffic based on IP addresses and protocols.
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Joye
12 hours agoTawna
2 days ago