Question

What are the primary differences between a Computer Virus and a Worm?

Hint:

{Virus = Needs a host + user action.
{Worm = Self-contained + spreads automatically over networks.

Answer 1

Concept: Both viruses and worms are types of malware that replicate and spread, but they differ significantly in how they infect systems and propagate. The key differences lie in dependency, propagation method, and impact. Step 1: {\color{red}Dependency on Host}
A computer virus attaches itself to a legitimate program or file and requires that host to execute. It spreads when the infected file is opened or shared.
A worm, on the other hand, is a standalone program and does not require a host file to spread.
Step 2: {\color{red}Method of Spread}
Viruses typically spread through:

• Infected files (USB drives, downloads, email attachments)
• User actions such as running programs

Worms spread automatically through:

• Network vulnerabilities
• Internet connections and unsecured systems

Step 3: {\color{red}User Interaction Requirement}
Viruses usually require user intervention (e.g., opening a file or running software).
Worms require little or no user interaction and propagate automatically once inside a network.
Step 4: {\color{red}Impact on Systems}
Viruses often:

• Corrupt or modify files
• Damage software or data

Worms primarily:

• Consume network bandwidth
• Spread rapidly across multiple systems
• May install additional malicious payloads