Image source
Under is the diagram of a router community where routers particularly r1 and r2 are connecting three extraordinary networks.
router community

kinds of routers

there are essentially two varieties of routers:
hardware routers: those are the hardware with exclusive in-constructed software program competence supplied through the manufactures. they use their routing competencies to perform routing. they have a few more unique capabilities also similarly to fundamental routing characteristic.

cisco 2900 router, zte zxt1200, zxt600 routers are the instance of typically used hardware routers.
software program routers: they perform within the equal way because the hardware routers do, however they don’t have any separate hardware container.