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Zimbra is a collaboration suite written in Java, owned by Synacor.

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.

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

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

HKBN (Hong Kong Broadband Network) is an ICT service provider based in Hong Kong. This includes the former WTT HK.

HKBN (Hong Kong Broadband Network) is an ICT service provider based in Hong Kong. This includes the former WTT HK.

F5 offers cloud services such as CDN and DDoS protection.

HKBN (Hong Kong Broadband Network) is an ICT service provider based in Hong Kong. This includes the former WTT HK.

HKBN (Hong Kong Broadband Network) is an ICT service provider based in Hong Kong. This includes the former WTT HK.

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

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

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.

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.

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

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

HTML5 is the fifth revision of the HTML standard.

Transitional version of HTML.

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

Big5 is a character encoding system for Traditional Chinese characters.

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

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