HTTP Upgrade Header - HTTP/2

   The HTTP Upgrade mechanism is used to establish HTTP/2 starting from plain HTTP. The client starts an HTTP/1.1 connection and sends an Upgrade: h2c header. If the server supports HTTP/2, it replies with HTTP 101 Switching Protocol status code. The HTTP Upgrade mechanism is used only for cleartext HTTP2 (h2c). In the case of HTTP2 over TLS (h2), the ALPN TLS protocol extension is used instead.

PHP 5.6.40

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

cPanel

   cPanel is the company that builds cPanel & WHM. cPanel & WHM is an online Linux-based web hosting control panel that provides a graphical interface and automation tools designed to simplify the process of hosting a web site to the website owner or the "end user".

mod_bwlimited 1.4

   mod_bwlimited is a CPanel module that allows limiting and monitoring of bandwidth and connection speed etc.

Apache 2.4.46 |Operating System:cPanel

   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.

Chunked transfer encoding

   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"