What device would be used as the third line of defense in a defense-in-depth approach?

What device would be used as the third line of defense in a defense-in-depth approach?

• host
• firewall
• edge router
• internal router

Explanation: In a defense-in-depth approach, the edge router would form the first line of defense. The firewall would be the second line of defense followed by the internal router making up the third line of defense.

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