When analyzing the IDS logs, the system administrator noticed an alert was logged when the external router was accessed from the administrator's Computer to update the router configuration. What type

A false negative occurs when genuinely malicious activity takes place but the IDS fails to detect it and generates no alert - the opposite scenario of what is described.

A true negative occurs when no malicious activity is present and the IDS correctly produces no alert; since an alert was generated here, it cannot be a true negative.

A true positive occurs when the IDS correctly detects and alerts on actual malicious activity; the administrator's action was authorized and benign, so no real attack occurred to justify a true positive classification.

A false positive occurs when an IDS incorrectly identifies benign or authorized activity as malicious and generates an alert. Since the system administrator legitimately accessed the router to perform a configuration update - a normal and authorized administrative task - the IDS alert does not correspond to any real attack, making it a false positive and a common IDS tuning problem.