Which of the following is seen as a security threat to a networked device?

Question

BlackTom AI · Accepted Answer

Hacking is the unauthorized intrusion into a computer system or network, so it is a classic example of a security threat.

1. Relevant knowledge points and concepts
- Threat vs. control: In information security, a threat is any potential cause of an unwanted incident that may result in harm to a system. Controls (or protections) are measures put in place to reduce risk.
- Hacking: deliberate, malicious attempts to bypass defenses, gain unauthorized access, modify data, or disrupt services.
- Firewall: a security control that filters traffic to protect devices and networks.
- Authorised access: legitimate, permitted use of systems by authenticated users.
- Virtual Private Network (VPN): an encryption and tunneling technology used to protect data in transit and provide secure remote access.

2. Step-by-step reasoning
- Examine option (a) Hacking: definition matches a malicious action intended to compromise confidentiality, integrity, or availability — therefore a threat.
- Examine option (b) Firewall: this is a defensive mechanism designed to block or limit threats, not a threat itself.
- Examine option (c) Authorised access: by definition, authorised access is the correct, expected use of resources and therefore not a threat.
- Examine option (d) Virtual private network: a VPN is a protective technology to secure communications and reduce exposure to eavesdropping — again, not a threat.

3. Intermediate logical steps
- Identify which choices describe harmful actions vs protective measures.
- Hacking = harmful action → qualifies as a security threat.
- Firewall, authorised access, VPN = protective/legitimate → do not qualify as threats.

4. Why the correct answer is correct
Hacking involves attackers exploiting vulnerabilities to compromise a networked device, which directly endangers security goals (confidentiality, integrity, availability). That aligns exactly with the definition of a security threat.

5. Why other options are incorrect
- Firewall: a security control used to defend against threats.
- Authorised access: legitimate user behavior, not an attack.
- VPN: a security technology to secure communications, not an attack.

Conclusion: The correct answer is a. Hacking, which matches the provided answer.

Which of the following is seen as a security threat to a networked device?单项选择题

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