An "attack" or threat in cybersecurity refers to an effort to breach, harm, or interfere with a computer system, network, or data. Cyberattacks with the intent to cause disruption, espionage, or financial gain can take many different forms, such as ransomware, phishing, malware, and denial of service (DoS) attacks. Technology, user education, and security best practices all work together to provide an effective response against these threats.