What must be verified about DMZ when limiting inbound traffic?

What must be verified about DMZ when limiting inbound traffic?

• A. DMZ implementation is optional.
• B. Examine firewall configs to verify that a DMZ is implemented to limit inbound traffic to authorized services, protocols and ports.
• C. The DMZ should allow all inbound traffic.
• D. DMZs are only applicable to wireless networks.

Answer: (B)

Focusing on how to control inbound access, the key idea is that a DMZ is used to expose only what’s necessary to the external network and to enforce strict filtering at the network edge. To verify this, you review the firewall configurations to confirm that a DMZ exists and that inbound traffic from the outside is limited to the authorized services, protocols, and ports. This ensures that externally reachable systems in the DMZ can be accessed only in the ways they’re intended, while everything else remains blocked from entry. This approach is essential because it creates a controlled buffer between the untrusted network and your internal systems, reducing exposure by default. It’s not optional to have a DMZ, it’s not appropriate to allow all inbound traffic, and DMZs aren’t limited to wireless networks—any infrastructure with external-facing services benefits from this segmentation and controlled access.

Focusing on how to control inbound access, the key idea is that a DMZ is used to expose only what’s necessary to the external network and to enforce strict filtering at the network edge. To verify this, you review the firewall configurations to confirm that a DMZ exists and that inbound traffic from the outside is limited to the authorized services, protocols, and ports. This ensures that externally reachable systems in the DMZ can be accessed only in the ways they’re intended, while everything else remains blocked from entry.

This approach is essential because it creates a controlled buffer between the untrusted network and your internal systems, reducing exposure by default. It’s not optional to have a DMZ, it’s not appropriate to allow all inbound traffic, and DMZs aren’t limited to wireless networks—any infrastructure with external-facing services benefits from this segmentation and controlled access.