SPF

   The Sender Policy Framework (SPF) is an email-authentication technique which is used to prevent spammers from sending messages on behalf of your domain. With SPF an organisation can publish authorized mail servers.

JSDelivr

   JSDelivr (stylized as jsDelivr) is a free public CDN for open-source projects.

Gzip Content-Encoding

   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.

Chunked transfer encoding

   Chunked transfer encoding is a streaming data transfer mechanism available in version 1.1 of the Hypertext Transfer Protocol (HTTP). In chunked transfer encoding, the data stream is divided into a series of non-overlapping "chunks"

Meta keywords

   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: мост, проектирование, строительство, эксплуатация, транспортное строительство, мостовые сооружения, транспортные сооружения, аварии мостов, тоннели, дорога, магистраль, инженер, образование, наука, разрушение, диагностика, ремонт, реконструкция, специальные сооружения, студент, квалификация, специальность, диагностика, bridge, bridgeart, design, transport construction

Vary Header Accept-Encoding

   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.

PHP 5.6.40

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