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  2. Forward-confirmed reverse DNS - Wikipedia

    en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS

    Forward-confirmed reverse DNS (FCrDNS), also known as full-circle reverse DNS, double-reverse DNS, or iprev, is a networking parameter configuration in which a given IP address has both forward (name-to-address) and reverse (address-to-name) Domain Name System (DNS) entries that match each other. This is the standard configuration expected by ...

  3. Reverse index - Wikipedia

    en.wikipedia.org/wiki/Reverse_index

    In database management systems, a reverse key index strategy reverses the key value before entering it in the index. [1] E.g., the value 24538 becomes 83542 in the index. Reversing the key value is particularly useful for indexing data such as sequence numbers , where each new key value is greater than the prior value, i.e., values ...

  4. Google Images - Wikipedia

    en.wikipedia.org/wiki/Google_Images

    In June 2011, Google Images added a "Search by Image" feature which allowed for reverse image searches directly in the image search-bar without third-party add-ons. This feature allows users to search for an image by dragging and dropping one onto the search bar, uploading one, or copy-pasting a URL that points to an image into the search bar. [12]

  5. Reverse-search algorithm - Wikipedia

    en.wikipedia.org/wiki/Reverse-search_algorithm

    Reverse-search algorithms are a class of algorithms for generating all objects of a given size, from certain classes of combinatorial objects. In many cases, these methods allow the objects to be generated in polynomial time per object, using only enough memory to store a constant number of objects ( polynomial space ).

  6. Reverse proxy - Wikipedia

    en.wikipedia.org/wiki/Reverse_proxy

    A reverse proxy can distribute the load from incoming requests to several servers, with each server supporting its own application area. In the case of reverse proxying web servers, the reverse proxy may have to rewrite the URL in each incoming request in order to match the relevant internal location of the requested resource.

  7. Search engine indexing - Wikipedia

    en.wikipedia.org/wiki/Search_engine_indexing

    Generating or maintaining a large-scale search engine index represents a significant storage and processing challenge. Many search engines utilize a form of compression to reduce the size of the indices on disk. [20] Consider the following scenario for a full text, Internet search engine. It takes 8 bits (or 1 byte) to store a single character.

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