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2. Blocking (computing) - Wikipedia

   en.wikipedia.org/wiki/Blocking_(computing)

   In a multitasking computer system, individual tasks, or threads of execution, must share the resources of the system. Shared resources include: the CPU, network and network interfaces, memory and disk. When one task is using a resource, it is generally not possible, or desirable, for another task to access it.

3. Blacklist (computing) - Wikipedia

   en.wikipedia.org/wiki/Blacklist_(computing)

   Screenshot of a website blocking the creation of content which matches a regular expression term on its blacklist. In computing, a blacklist, disallowlist, blocklist, or denylist is a basic access control mechanism that allows through all elements (email addresses, users, passwords, URLs, IP addresses, domain names, file hashes, etc.), except those explicitly mentioned.

4. Block (data storage) - Wikipedia

   en.wikipedia.org/wiki/Block_(data_storage)

   Data thus structured are said to be blocked. The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer, and read or written a whole block at a time. Blocking reduces the overhead and speeds up the handling of the data stream. [3]

5. Block and unblock email addresses in AOL Mail

   help.aol.com/articles/block-and-unblock-email...

   Block email addresses. 1. Open an email or select it from your mailbox. 2. Click the More icon. 2. Click Block Senders. 2. Optionally, select to also delete emails you've received from the sender.

6. Internet filter - Wikipedia

   en.wikipedia.org/wiki/Internet_filter

   Filter administrators may prefer to err on the side of caution by accepting over blocking to prevent any risk of access to sites that they determine to be undesirable. Content-control software was mentioned as blocking access to Beaver College before its name change to Arcadia University. [19] Another example was the filtering of Horniman ...

7. IP address blocking - Wikipedia

   en.wikipedia.org/wiki/IP_address_blocking

   IP address blocking is commonly used to protect against brute force attacks and to prevent access by a disruptive address. It can also be used to restrict access to or from a particular geographic area; for example, syndicating content to a specific region through the use of Internet geolocation .