A router is the device that connect two or more device with each other then these devices can share the data,file,internet with each others. Today many famous routers available in market like netgear,spectrum,asus etc . They all provide you high speed data bandwidth .After purchase it you need to login or setup your router with your device. To know router login and setup process visit to router setup. Extender is the device who increase you router coverage area. To use extender you need to connect extender with you router and router setup provide you all information to setup you extender with your router.