Site Info - 163.com

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.

Tengine is an open source web server based on Nginx and originated by Taobao.

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

The Apache HTTP Server is an open source web server by the Apache Software Foundation.

Envoy Proxy is a proxy server designed for large service-oriented architectures.

Alibaba a Chinese e-commerce and cloud computing company.

Zenlayer is a cloud services provider headquartered in USA.

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

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

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

China Mobile is a Chinese state-owned telecommunication corporation.

Alibaba a Chinese e-commerce and cloud computing company.

Zenlayer is a cloud services provider headquartered in USA.

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.

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

China Mobile is a Chinese state-owned telecommunication corporation.

Akamai is a content delivery network. This includes the former brand Instart Logic.

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

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

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

Baidu Analytics (Tongji) is a web analytics service by Baidu.

Umeng is a Chinese provider of online web traffic statistics, formerly operating under the name CNZZ.

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

Baidu Promote is the advertising network of the Chinese web services company.

The Google Advertising network consists of AdSense, DoubleClick and other services.

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

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.

Persistent cookies with an expiration time of up to 1 day.

Persistent cookies with an expiration time between 1 and 10 years.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

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.

Deflate is a data compression algorithm.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

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

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

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

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

HTML5 is the fifth revision of the HTML standard.

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

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

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.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

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