Which cybersecurity framework element is designed to isolate an internal trusted network from untrusted external traffic by inspecting incoming and outgoing packets against security rules?
Answer and explanation
Correct answer: C. Firewall
- Step 1: Identify network perimeter defense systems.
- Step 2: A firewall acts as a security barrier, monitoring and filtering inbound and outbound network traffic based on predefined access control rules (packet filtering, stateful inspection, or application-level proxying).
Answer
Firewall.
Why not the others: DMZ is a subnetwork hosting public services; NIC is hardware connecting a device to a network; VPN encrypts remote connection tunnels.
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