![]() In certain websites, including social networks such as Facebook or editable databases like wikis, users can apply blocks (based in either IP number or account) on other users deemed undesirable to prevent them from performing certain actions. īlocking may also refer to denying access to a web server based on the IP address of the client machine. ![]() ![]() ![]() In the United States, the Children's Internet Protection Act requires schools receiving federal funded discount rates for Internet access to install filter software that blocks obscene content, pornography, and, where applicable, content "harmful to minors". Some countries, including China and Singapore, block access to certain news information. Blocking and its inverse, unblocking, may be implemented by the owners of computers using software. On the Internet, a block or ban is a technical measure intended to restrict access to information or resources.
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