Character Encoding :utf-8

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   This website is using utf-8 character encoding in HTML , character encoding is used to represent a repertoire of characters by some kind of encoding system.

Gzip Content-Encoding

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   The Content-Encoding entity header is used to compress the media-type. When present, its value indicates which encodings were applied to the entity-body. It lets the client know how to decode in order to obtain the media-type referenced by the Content-Type header.

PHP 5.6.40-0+deb8u12

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   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

PHP 5.6.40-0+deb8u2

Download List of All Websites using PHP 5.6.40-0+deb8u2

   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

Apache 2.4.10 |Operating System:Debian

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   The Apache HTTP Server, colloquially called Apache, is free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation.

Meta Description

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   A meta description is a 160-character snippet, a meta tag in HTML, that summarizes a page`s content. this website is having meta description of the following : Exploration Spatiale des Environnements Planétaires

SEO Robots : Allow to index and follow website links

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   Meta robots tag is a tag that tells search engines what to follow and what not to follow.

Vary Header check for cookies

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   The Vary HTTP response header determines how to match future request headers to decide whether a cached response can be used rather than requesting a fresh one from the origin server. It is used by the server to indicate which headers it used when selecting a representation of a resource in a content negotiation algorithm.

Vary Header Accept-Encoding

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   The Accept-Encoding request HTTP header advertises which content encoding, usually a compression algorithm, the client is able to understand. Using content negotiation, the server selects one of the proposals, uses it and informs the client of its choice with the Content-Encoding response header.