Which of the following should be used in place of these devices to prevent future attacks?

An IDS was installed behind the edge firewall after a network was breached. The network was then breached again even though the IDS logged the attack .

Which of the following should be used in place of these devices to prevent future attacks?
A . A network tap
B . A proxy server
C . A UTM appliance
D . A content filter

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Answer: C