Im trying to setup a ccna lab for self-study but with the new ccna exam out i have a few question. i plan on buying one switch and 2 routers for starters. now in order to practice all the commands, or whatever techniques or commands i need to learn for the ccna. must all 3 routers have the latest IOS version installed. what is the earliest that i could get away with? i read somewhere for the switch at least 12.1, what about for the routers? does it even matter?
