$11.$ Which statement is true regarding the use of intrusion detection techniques, such as intrusion detection systems and$/$or intrusion prevention system $($IDS$/$IPS$)?$

Intrusion prevention techniques are required to block all network attacks

Intrusion detection techniques are required on all systems components

Intrusion detection techniques are required to isolate systems in the cardholder data environment from all other systems

Intrusion detection techniques are required at critical points of the CDE