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

IONOS (formerly 1&1 IONOS and 1&1 Internet) is a European web hosting company owned by United Internet.

IONOS (formerly 1&1 IONOS and 1&1 Internet) is a European web hosting company owned by United Internet.

IONOS (formerly 1&1 IONOS and 1&1 Internet) is a European internet services company owned by United Internet.

IONOS (formerly 1&1 IONOS and 1&1 Internet) is a European internet services company owned by United Internet.

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

Gzip (GNU zip) is a file 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.

Transitional version of HTML.

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