i gotta say i really don't understand what it is your asking!

if you want to know what clients can access services running on an IIS server!?! any internet client can access the service it was designed for, on iis, if that service has been enabled. just like any other server. it dosn't matter what os the client is on

it can serve up ftp, telnet, nntp, smtp, www all with their appropriate protocols to name the more common ones.