When describing malware, what is a difference between a virus and a worm?

Question

Accepted Answer

A virus replicates itself by attaching to another file, whereas a worm can replicate itself independently.

Answer

A virus can be used to deliver advertisements without user consent, whereas a worm cannot.

Answer

A virus can be used to launch a DoS attack (but not a DDoS), but a worm can be used to launch both DoS and DDoS attacks.

Answer

A virus focuses on gaining privileged access to a device, whereas a worm does not.

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