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Java is a general-purpose language originally developed by Sun Microsystems.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

vWebServer is a HTTP server running on Windows.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Windows is an operating system produced by Microsoft.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

NetEase (also known as 163.com) is a Chinese internet technology company.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

NetEase (also known as 163.com) is a Chinese internet technology company.

HiChina is a Chinese internet services provider owned by Alibaba.

NetEase (also known as 163.com) is a Chinese internet technology company.

The SSL certificate is invalid because it is not issued for the domain where it is used.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

Brotli is a lossless compression algorithm developed by Google.

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

HTTP/2 is the second major version of the HTTP network protocol.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

HTML5 is the fifth revision of the HTML standard.

Transitional version of XHTML.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

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