HTTP Upgrade Header - HTTP/2
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The HTTP Upgrade mechanism is used to establish HTTP/2 starting from plain HTTP. The client starts an HTTP/1.1 connection and sends an Upgrade: h2c header. If the server supports HTTP/2, it replies with HTTP 101 Switching Protocol status code. The HTTP Upgrade mechanism is used only for cleartext HTTP2 (h2c). In the case of HTTP2 over TLS (h2), the ALPN TLS protocol extension is used instead.
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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.
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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.
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XFN 1.1
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XFN is a technical term that is an acronym that stands for “XHTML Friends Network.” This is primarily used by websites that want to create a series of referral links between other websites in order to boost SEO ratings.
Meta keywords
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Meta keywords are types of meta tags in the HTML source code of a webpage. They describe the content of a website shortly and concisely,this website is using the following keywords: aqua hair,colorful hair,kardashian hair,keeping up with the kardashians,kylie jenner,kylie jenner aqua hair,kylie jenner hair,kylie jenner hair stylie,kylie jenner style,christina aguiler ditches her blonde,christina aguilera,christina aguilera brown hair,christina aguilera brunette,christina aguilera hair,blow drying curly hair,blow drying wavy hair,curly hair,curly or wavy hair,diffusing hair,diffusing your hair,hair diffuser,hair tips for curly or wavy hair,wavy hair,center part,flat hair tips,giving hair volume,hair illusions,hair volume,hairstyling tip of the day,how to fix flat hair,how to make your hair look fuller,making your hair look full,oily flat hair,oily hair,side part,tips for flat hair,tips for oily hair,babyliss,babyliss flat iron,babyliss irons,best flat irons,flat irons,flat irons for keratin treatments,flat irons for smoothing treatments,hair irons,hair straightening tools,how to do a keratin treatment,keratin flat irons,keratin treatment tools,keratin treatments,smooth hair,smoothing treatment tools,cowlicks,hair hacks,hair tips,hair tricks,how to handle cowlicks,how to tame your cowlicks,reese witherspoon,reese witherspoon cowlick,reese witherspoon hair