How does a host-based IPS protect devices?

A host-based Intrusion Prevention System (IPS) protects devices by specifically monitoring and analyzing the behavior of individual hosts or devices to identify and prevent malicious activity. This system is installed directly on the endpoints, such as computers or servers, allowing it to observe system calls, file access, and running processes. When the IPS detects aberrant behavior that aligns with known attack patterns or rules that may indicate a potential threat, it can take immediate actions such as blocking the offending process, alerting administrators, or logging the event for further analysis.

This targeted approach enables the host-based IPS to provide an additional layer of security tailored to the specific needs and vulnerabilities of each device. It is particularly effective at defending against threats that may not be visible or detectable at the network level, such as malware that attempts to exploit vulnerabilities within the host's operating system or applications.

In contrast, other mentioned methods like controlling access to cloud storage do not directly monitor or protect endpoints, solely focusing on user access rather than device-level threats. Similarly, an emphasis on network-wide threats would overlook the individual protections that each device requires. Implementing physical security measures does not address the digital threats that a host-based IPS is designed to guard against.