Final answer:
Intrusion detection systems are a critical component of national security, aimed at detecting unauthorized access to sensitive information. These systems are supported by intelligence and counterintelligence services, as well as infrastructure resilience measures, to protect against both external and internal threats.
Step-by-step explanation:
Access control measures such as intrusion detection play a critical role in defending against unauthorized access to classified information and maintaining national security. By employing a combination of intelligence services to defeat external threats and counterintelligence services to safeguard against internal threats, nations strive to protect sensitive data and critical infrastructure. Intrusion detection systems (IDS) are designed to monitor networks and systems for malicious activity or policy violations. If detected, the system alerts the security personnel or management.
Furthermore, the resilience of national infrastructure is also ensured through the implementation of civil defense and emergency preparedness measures, which include anti-terrorism legislation. Enhanced port security technologies such as X-ray equipment and trained sniffer dogs, as mentioned by Baskin (2002), are integral in preventing unauthorized introductions which could include invasive species or harmful agents.
Research in human factors psychology, such as the study by Bruno & Abrahão (2012), indicates how decision fatigue can impact the accuracy of operators working within security centers, highlighting the importance of human elements in the effectiveness of intrusion detection systems. Governments solidify their cybersecurity against the weaponization of cyberspace through tailored strategies to detect, deter, and counteract hacking attempts by militants and other groups seeking to disrupt or steal information.