Intranet uses Internet protocols and is similar to a website. Difference between Internet and Intranet is that the latter, unlike the former, is an internal network, confined within an organization.
Joomla is a content management system (CMS) where functionality meets flexibility. As one of the most preferred CMSs in the world, Joomla has shown impressive growth over the years.
Internet is one of the fastest evolving entities to have ever been known to mankind. A decade back having a website or rather an online address was a symbol of pride for most businesses.