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