A network administrator is implementing a Classic Firewall and a Zone-Based Firewall concurrently on a router. Which statement best describes this implementation?

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A network administrator is implementing a Classic Firewall and a Zone-Based Firewall concurrently on a router. Which statement best describes this implementation?

An interface must be assigned to a security zone before IP inspection can occur.
Both models must be implemented on all interfaces.
The two models cannot be implemented on a single interface.
A Classic Firewall and Zone-Based Firewall cannot be used concurrently.

Explanation: Both a Classic Firewall and Zone-Based Firewall can be implemented concurrently on a router, but they cannot both be configured on a single interface.

Exam with this question: CCNA Security Chapter 4 Exam Answers