What is Intranet?
Intranet
Intranet refers to a collection of networks within a logical body, such as a building, corporation or other entity. Intranets can be as simple as two computers connected at home to each other, or as vast as 1000 branch offices of a bank, connected via privately owned, non-public network links. Intranets usually have a firewall and router, which permits access to the public Internet, while protecting the internal Intranet from malicious users.
Finally, the term 'internet' (lower case) is a generic description of a collection of networked devices.