IPS and SIEM are technologies that can help secure sensitive data on critical networks by implementing controls to mitigate APTs. IPS stands for Intrusion Prevention System, and it is a device or software that monitors network traffic and blocks or prevents malicious packets or activities based on predefined rules or signatures. IPS can help detect and stop APTs that may try to exploit vulnerabilities or bypass security controls on critical networks. SIEM stands for Security Information and Event Management, and it is a system that collects, correlates, analyzes, and reports security data from various sources, such as logs, alerts, events, etc. SIEM can help identify and respond to APTs that may exhibit anomalous or suspicious behavior patterns on critical networks.