单选题An administrator wants to be alerted when a network-based attack is underway, but the company policy prohibits blocking or dropping network connections. Which of the following MUST be deployed?（）AIDSBIPSCFirewallDManaged PKI
单选题
An administrator wants to be alerted when a network-based attack is underway, but the company policy prohibits blocking or dropping network connections. Which of the following MUST be deployed?（）
A
IDS
B
IPS
C
Firewall
D
Managed PKI
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