cPanel is the Graphical Interface Control Panel for conducting the web hosting. By using the automatic tools of it, you can easily make our work fast and easy. cPanel provides 3 tier system structure such as: administrator, reseller and end-user website owners for controlling the various aspects of the website.
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C-Panel is generally a dedicated server. You can also operate on Virtual private server or VPS sand it is also supported on Unix related operating system CentOS, Red Hat Linux, CloudLinux and FreeBSD etc. To know in detail you can visit here.
cPanel also supports Apache, PHP, MySQL, Postgres, Perl, and BIND (DNS) etc. based applications. It also supports POP3, IMAP, and SMTP etc. for email. The common port number of cPanel is 2082 and the port number of SSL is 2083.
If you install it on a server, then you never remove it. To remove it you have to do an OS reload or you have to re-install for removing it.