National Information Infrastructures (NII) refer to the critical information and communication technologies that are essential for the smooth operations of a nation's economy and security. There are synonyms for NII, such as National Data Networks (NDN), National Information Networks (NIN), and National Communication Networks (NCN). These terms are all used to describe the interconnected networks that provide access to both public and private sector services, such as healthcare, finance, transportation and energy. The expansion and modernization of these components are a crucial aspect to advancing any nation, making it all the more important to understand the various synonyms that are available to describe them.