If a file has an extension that is not supported by any of the MIME types or does not have an extension at all, Artifactory will use the default MIME type of application/octet-stream? What does it mean?

AuthorFullName__c
Batel Tova
articleNumber
000004861
ft:sourceType
Salesforce
FirstPublishedDate
2020-12-28T09:36:20Z
lastModifiedDate
2020-12-28
VersionNumber
4