Must Revalidate HTTP Cache-Control
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Indicates that once a resource has become stale (e.g. max-age has expired), a cache must not use the response to satisfy subsequent requests for this resource without successful validation on the origin server.
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NO Store HTTP Cache-Control
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The cache should not store anything about the client request or server response.
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No Cache Content
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Forces caches to submit the request to the origin server for validation before releasing a cached copy.
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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: General Chuck Yeager, Chuck Yeager, Charles Yeager, aviation, history, Bell X-1, X-1, american hero, right stuff, general chuck yeager foundation, chuck yeager foundation, P-51 Ace, Mustang ace, Bell rocket plane, test pilot, Yeager, Yeagar, Yaeger, Yager, Yeagre, General Charles Yeager, this day in aviation, stars, stripes, me-109, eisenhower, general, sound barrier, air force base, edwards, AFB, store, memorabilia, american, Yeager documentary, Chuck Yeager documentary, time-to-height record: FL350 (35,000 feet) in 16 minutes
Pragma Header - backwards compatibility with HTTP/1.0
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The Pragma HTTP/1.0 general header is an implementation-specific header that may have various effects along the request-response chain. It is used for backwards compatibility with HTTP/1.0 caches where the Cache-Control HTTP/1.1 header is not yet present.
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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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Post Cache-Control Header
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this website is using post-heck Cache-Control Header.
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Precheck Cache-Control Header
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this website is using precheck Cache-Control 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.