Watchguard VS Cisco setting up two networks

Hi everyone!

I came from a Watchguard shop where that is all we used. When setting up a watchguard and we wanted two separate networks we could set Interface 1 as 192.168.0.x, and set Interface 2 as 192.168.1.x. And that was that. You now had two separate networks, and you could even enable DHCP on them if you'd want.

Is there a way/product that Cisco has that will do this? I have switched to a more Cisco based shop and learning my ways around cisco. Or is the only way to do this is with VLANS on cisco products?