A person who accesses a network by walking through an unlocked door is known as

Question

BlackTom AI · Accepted Answer

Accessing a system without permission is the definition of an unauthorised user, so option d is correct.

1) Relevant knowledge points and concepts
- Unauthorised user: a person who gains access to a network or system without permission or proper credentials. This includes someone who simply walks in and uses an unlocked terminal or network connection.
- Hacker: a person skilled in computers who may explore or break into systems; not every hacker is unauthorised, and the term implies technical effort rather than passive entry.
- Worm and virus: types of malicious software (malware). They are programs that replicate or infect systems, not human users.

2) Step‑by‑step reasoning
- The scenario describes a person physically walking through an unlocked door and thereby accessing the network. That implies no permission, credentials, or authorised process were used.
- Because the actor is a person (not software) and they lack permission, we classify them by their authorization status rather than by being malware or a technically skilled intruder.

3) Calculations / intermediate steps
- No numeric calculations are required. Logical classification: person + no permission = unauthorised user.

4) Why the correct answer is correct
- “Unauthorised user” directly matches the situation: a human gaining access without authorization (walking through an unlocked door is the analogy for an unprotected entry point). The term explicitly refers to access control violations by people.

5) Why the other options are incorrect
- a. worm: incorrect because a worm is self-replicating malware, not a person.
- b. hacker: incorrect because while a hacker might gain access, the question emphasizes simple unauthorized entry through an unlocked door, not technical intrusion; “hacker” implies skillful breach rather than just lacking authorization.
- c. virus: incorrect because a virus is malicious software that infects files/systems, not a human user.

6) Conclusion
The best and precise label for a person accessing a network by walking through an unlocked door is d. unauthorised user, which matches the provided answer.

A person who accesses a network by walking through an unlocked door is known as单项选择题

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