Host-based firewall
Course: AP® Cybersecurity Shows up in: Unit 4: Securing Devices
Software on a single device that allows or denies traffic into or out of it using an ordered set of rules.
Appears in the course and exam description (CED): 4.3.D.14.3.D.24.3.D.3
Why it matters in Unit 4
Protects the device even on a compromised network, and can block outbound traffic.
Example
A laptop rule denying inbound remote desktop.
Learn it properly, with a checkpoint 4.3 Protecting Devices