International marketing is just the application of marketing philosophy to more than just one country. Nevertheless, there is a crossover between what is generally expressed as international marketing and global marketing, which is a related term.
The connection is the effect of the process of internationalisation. A lot of American and European authors consider international marketing as a mere extension of exporting, whereby the marketing mix is basically adapted in some way to take into account dissimilarities in consumers and segments. Consequently that global marketing uses a more standardised tactic to world markets and focuses upon similarity, in other words the similarities in customers and segments.