Well you dont need any experience or previous knowledge about networking when it comes to CCNA.. you'd be surprised that some of your classmates in that class knows less about computers than you do.. but anyhow.. as for me.. i finished a nice networking course called Network Management Certificate 4.. and it basically covered most things about networking.. CCNA will just help you reach that ADVANCED level in networking.. but trust me.. no matter how advanced your level is.. you will still have to learn a lot once you start working.. There is more to learn out there than in class... sometimes you even have to break the rules or principles that you learned in class..

But anyway.. i work in a flower shop now.. hehe just taking a low profile job while im applying for a full time MCSE course..