Viewport - Width

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Viewport - initial-scale

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Facebook Pixel

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   The Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising by understanding the actions people take on your website.

SPF

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   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.

Facebook SDK

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   The Facebook SDK for JavaScript provides a rich set of client-side functionality

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.

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: TST tourist; TSTtourist; tour châu âu; tour mỹ; tour châu á; tour nhật bản; tour hàn quốc; tour đài loan; tour thái lan; tour singapore; tour malaysia; tour pháp; tour thụy sĩ; tour ý; tour bắc âu; tour đông âu; tour đức; tour hà lan; tour tây ban nha, tour bồ đào nha; tour pháp; tour cuba; tour ai cập; tour trong nước; tour hà nội; tour hạ long; tour bái đính; tour tràng an; tour sapa; tour mai châu; tour mộc châu; tour lào cai; tour tây bắc; tour đông bắc; tour hà giang; tour đà nẵng, tour hội an; tour huế; tour quảng bình; tour phú quốc, tour nha trang; tour côn đảo; tour miền tây; tour cần thơ; tour tiền giang

Post Cache-Control Header

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   this website is using post-heck Cache-Control Header.

Precheck Cache-Control Header

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   this website is using precheck Cache-Control Header.

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.

NO Store HTTP Cache-Control

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   The cache should not store anything about the client request or server response.

No Cache Content

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   Forces caches to submit the request to the origin server for validation before releasing a cached copy.

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 : TST tourist với hơn 20 năm kinh nghiệp tổ chức và điều hành tour du lịch trong và ngoài nước đã khẳng định được vị trí Top 10 hãng lữ hành hàng đầu Việt Nam. Được du khách bình chọn là hãng lữ hành chuyên tour Châu Âu hàng đầu Việt Nam nhiều năm liền. Với tiêu chí chuyên nghiệp, mới lạ, chất lượng tiêu chuẩn từ 4 sao, TST tourist là sự lựa chọn hàng đầu của du khách về chất lượng.

PHP

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

PHP 5.6.32

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

Apache 2.4.29 |Operating System:Win64

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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.

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.

Chunked transfer encoding

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   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"