Web filter
A web filter is a software tool or system designed to monitor and restrict access to specific websites or online content, often to enhance security or enforce policies. It works by scanning URLs, keywords, or data packets and blocking harmful or inappropriate material, adapting in modern usage to combat cyber threats like malware and misinformation in schools, businesses, and homes.
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The Great Firewall of China, one of the world's most extensive web filters, processes over 2 billion filtering operations per day and has been credited with blocking access to more than 10,000 websites, demonstrating how a single national system can shape global internet freedom and influence online behavior on a massive scale.
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