Internet Adventurer at the moment does not come with it's own implementation of FTP, but it does allow you to
run OS/2's standard PM FTP Client, or use the one in Netscape, or the built-in browser.
FAQ - Frequently asked questions
When will IA have it's own custom ftp client ? It is in the works, but it hasn't got a high priority, since not many people are using ftp anymore, except though the browser.
What will the FTP client contain ? All you need, like multiple simultaneous transfers, FTP resume, file previewing, and a fully graphical interface.
How can you say that IA supports FTP when it hasn't got a client yet ? Because Internet Adventurer does support FTP, by utilising OS/2's standard FTP client, or the one contained in the built-in browser.