n February of 1996 IEEE, a nonprofit organization responsible for many Internet standards, published RFC (Request for Comment) 1918. RFC 1918 outlines recommendations for private IP addresses. Navigate to rfc-editor.org (Links to an external site.) and search “1918” to read the article.
The article gives several examples where external connectivity may not be required. Read the examples in the article, then write a suggestion for another instance in which a private IP address could be appropriate.