Why do links to files with a trailing slash result in a 404?

Question

Apache HTTP Server

Is it some kind of feature of the server that links to files with a slash at the end (site.ru/file.pdf/) lead to a 404 error? At what level does a 404 redirect happen?

Answer 1

Because site.ru/file.pdf is a file access. And site.ru/file.pdf/ - accessing the directory inside the file (this cannot be, but the point is)