Can I use a Cisco 770 and two 1600 router for pratice?

frenchv

Is that good enough or should I invest in 2600 series routers?

tiersten

The 770 doesn't run IOS so its useless. The 1601 routers will can run IOS up to 12.3 if you only want IP BASE so should be okay. You'll have to wait for somebody with more experience of that range to say whether they're suitable for CCNA studying.