A digital immune system is a system of security tools and processes designed to protect computers and networks from cyberattacks. It works similarly to a biological immune system, where it monitors, detects, and responds to any malicious activities or threats. The system is designed to be adaptive, so it can quickly and accurately recognize and counter threats as they evolve. It is comprised of multiple layers of security controls, such as firewalls, antivirus software, and intrusion detection and prevention systems, which all work together to protect the system from potential threats.