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How Firewalls Work

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Firewalls have helped protect computers in large companies for years. Now, they're a critical component of home networks, as well. See how firewalls work.

How does a security passcard work?

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Security passcards are often used to gain entry into areas and buildings with restricted access. Find out what data is kept an encoded security passcard and how they work.

How Computer Viruses Work

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A computer virus can cause a lot of damage. Find out about worms, computer virus history, origins, and evolution, and how to protect your computer.

NAT: How Network Address Translation Works

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Network Address Translation helps improve security by reusing IP addresses. Learn about Network Address Translation and NAT security.

What Is an AI Black Box? A Computer Scientist Explains

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AI black boxes refer to AI systems with internal workings that are invisible to the user. Here's what that means.

Avoid the Most Common Passwords With These Security Tips

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In the modern day, people have to try and stay organized with dozens, maybe even hundreds, of online accounts. As a result, they may fall back using easy-to-guess passwords out of a misguided sense of convenience, or using the same password across multiple sites.

How Computer Mice Work

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The mouse might just be the computer user's best friend. Every day of your computing life, you reach out for your mouse whenever you want to move your cursor or activate something. Learn how this human-machine interface translates your movements into digital data.

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