sorry for the late reply, dont check this site too often,

yes i definately reccomend CCNA, its a good class and covors almost everything you need to know as far as networking goes, once you got CCNA you can basically adapt yourself to any type of router/switch, and since in CCNA1 they teach you the basics of networking the operating system your working with isnt going to make much of a difference.

Like i said i am in the middle of the CCNA track, but i have to warn you, it WILL be hard online, you dont have any of those expensive routers to do the labs with, and the labs help ALOT, you actually get to see how everything works and what kind of stupid mistakes you sometimes make.

But didnt you say it was free? then i would go for it anyway even though its online, your going to learn alot.

cheers-

Dome/Liran