Sorry if this is a very basic question!

In a One-Mesh network, do all range extenders (once registered with the router) have to be positioned in range of the wireless router, or do they 'piggy-back' and pick up the wireless signal from each other? The extender setup instructions imply the former and just talk about seamless connection by devices when moving from place to place, but that doesn't seem to make much sense if the network is to be extended over a large house.

Thanks!