Alternative FAQ Phrasings: What is a cybersecurity? | What is cyber security?
Definition: cybersecurity (a.k.a. cyber security, computer network security) refers to the specialization of computer network security that consists of technologies, policies, and procedures that protect networked computer systems from unauthorized use or harm. Broadly speaking, cybersecurity topics can be subdivided into two complementary areas: cyber attacks, which are essentially offensive and emphasize network penetration techniques; and cyber defenses, which are essentially protective and emphasize counter-measures intended to eliminate or mitigate cyber attacks.

The increasing reliance of our information-age economies and governments on cyber (computer-based) infrastructure makes them progressively more vulnerable to cyber attacks on our computer systems, networks, and data. In their most disruptive form, cyber attacks target the enterprise, government, military, or other infrastructural assets of a nation or its citizens. Both the volume and sophistication of cyber threats (cyber warfare, cyber terrorism, cyber espionage and malicious hacking) are monotonically increasing, and pose potent threats to our enterprise, government, military, or other infrastructural assets. Knowing that to be forewarned is to be forearmed, we are well advised to effect strong Cybersecurity defenses that will thwart rapidly evolving cyber threats.

cyber threat: A potential cyber attack, which may be assigned a probability of occurrence that can be used for cyber risk assessment.

Cyber attack: An offensive action by a malicious actor that is intended to undermine the functions of networked computers and their related resources, including unauthorized access, unapproved changes, and malicious destruction. Examples of cyber attacks include Distributed Denial of Service (DDoS) and Man-in-the-Middle (MITM) attacks.

cyber risk: A risk assessment that has been assigned to a cyber threat, such as DDoS attack or a data breach. A cyber risk assessment may be either qualitative or quantitative, where the latter should estimate risk (R) as a function of the magnitude of the potential loss (L) and the probability that L will occur (i.e., R = p * L).

Malware is an umbrella term derived from "malicious software", and refers to any software that is intrusive (unauthorized access), disruptive, or destructive to computer systems and networks. Malware may take many forms (executable code, data files) and includes, but is not limited to, computer viruses, worms, trojan horses (trojans), bots (botnets), spyware (system monitors, adware, tracking cookies), rogueware (scareware, ransomware), and other malicious programs. The majority of active malware threats are usually worms or trojans rather than viruses.

Alternative FAQ Phrasings: What is a cyber hygiene? | What is cybersecurity hygiene? | What is cyber security hygiene?
Definition: cyber hygiene (a.k.a., cybersecurity hygiene, cyber security hygiene) is a colloquial term that refers to best practices and other activities that computer system administrators and users can undertake to improve their cybersecurity while engaging in common online activities, such as web browsing, emailing, texting, etc.).

Anti-virus software, a.k.a anti-malware software, is computer software used to scan files to identify and eliminate malicious software (malware). Although anti-virus software was originally developed to detect and remove computer viruses (hence its name), it has been broadened in scope to detect other malware, such as worms, Trojan horses, adware, spyware, ransomware, etc.
Virus dictionary approach: The anti-virus software scans a file while referring to a dictionary of known virus signatures that have been previously identified. If a code segment in the file matches any virus signature in the virus dictionary, then the anti-virus software performs one or more of the following operations: deletes the file; quarantines the file so that it is unable to spread; or attempts to repair the file by removing the virus from the file.