High Quality Content by WIKIPEDIA articles! On the Internet, a block is a technical measure intended to restrict access to information or resources. Blocks should not be confused with bans, although they are often used to enforce a ban. A blocked user may have certain privileges revoked, such as the ability to publish content or communicate with other users, or they may be completely unable to access the service in question. Blocks can apply to individual user accounts or ranges of IP addresses. In most cases, individual services and websites set their own blocking policies, and a block issued by one will not apply on any others. Most online communication tools, including chat software and social networking sites, allow users to block other users from contacting them. Such a block normally has no effect on the subject's access to any other part of the service.

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