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N10-009 · Question #428
N10-009 Question #428: Real Exam Question with Answer & Explanation
The correct answer is A: Required ports, protocols, and services. Before creating any rules, you must identify which ports, protocols, and services need to be allowed so the firewall can be configured to permit legitimate traffic and block everything else.
Submitted by lukas.cz· Mar 6, 2026Network Security
Question
A network administrator is setting up a firewall to protect the organization's network from external threats. Which of the following should the administrator consider first when configuring the firewall?
Options
- ARequired ports, protocols, and services
- BInclusion of a deny all rule
- CVPN access
- DOutbound access originating from customer-facing servers
Explanation
Before creating any rules, you must identify which ports, protocols, and services need to be allowed so the firewall can be configured to permit legitimate traffic and block everything else.
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