An Advanced Persistent Threat (APT) is a sophisticated and targeted cyber attack in which an unauthorized user gains access to a network and remains undetected for an extended period. APTs are characterized by their persistence, meaning that attackers continuously and stealthily gather intelligence or carry out malicious activities over an extended duration.

For the Security+ exam, understanding Advanced Persistent Threats is relevant in the context of cybersecurity, threat intelligence, and incident response. Recognize that APTs pose significant challenges due to their advanced tactics, techniques, and the often nation-state-sponsored nature of the attacks.

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