Hi !\n\nI have a short question - how hard is 70-621 (upgrade MCDST to MCITP)\nexam ? I've read a lots of information and I'm confused a little...\nPeople says that 70-621 is more difficult then 70-620, because 70-621\nhad so much network environment (generally Active Directory and\nservers connections), that's true ??\n\nWhich book is suitable to pass 70-621 ? Vista Inside Out ? I have\nTraining Kit 70-620 and generally is good, but there are a few basis\nonly about networking...\n\nThanks for info :-)\n\n\nBest Regards.