How does antivirus software function?

• A. By blocking all internet connections
• B. By scanning, detecting, and removing viruses and other malicious software
• C. By creating user access restrictions
• D. By backing up system data automatically

Answer: (B)

Antivirus software functions primarily by scanning, detecting, and removing viruses and other types of malicious software. The software continuously monitors a computer system for potential threats by examining files for known malware signatures and known patterns of behavior associated with malicious activities. When a potential threat is identified, the antivirus program can quarantine the infected file, effectively isolating it from the rest of the system, and then offers options for removal or further action to ensure the user's device remains secure.

This proactive approach not only helps in removing existing threats but also aids in preventing future infections by providing real-time protection and updates to combat emerging malware. The capability of the software to regularly update its virus definitions allows it to recognize new threats as they arise, enhancing overall system security.

The other options describe functions that are not the primary role of antivirus software. Blocking internet connections is not a standard function of antivirus software; rather, it might be a feature of a firewall. Creating user access restrictions is typically managed by access control systems or operating system permissions, not antivirus solutions. Backing up system data automatically is a function of backup software or cloud storage services, not antivirus. Thus, the correct choice emphasizes the essential role of antivirus in detecting and mitigating malware threats efficiently.