📖 15. Security
📖 From Operating System • 458 questions available
About 15. Security
While protection is about internal controls, Security is about defending the system from external threats and malicious attacks, such as viruses, hackers, and malware. It's like the castle's outer wall, designed to keep intruders out. The OS plays a crucial role in securing the system by controlling who is allowed to log in, often through a username and password authentication system. It also guards the network ports and monitors for suspicious activity to prevent unauthorized access and data breaches.
Security also involves maintaining data integrity and confidentiality. The OS ensures that data is not lost, corrupted, or stolen. This includes file permissions, which dictate who can read, write, or execute a file, and encryption, which scrambles data so it cannot be understood if intercepted. A key aspect is protecting against software vulnerabilities, where a malicious program could exploit a bug in the OS to gain control. The OS developers constantly release security updates to patch these holes, making the fight against threats an ongoing process.
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🔄 Last updated: 2026-08-08