Access points create new WiFi reception areas within a house. Stand along access points are suitable for a budget multi-room home WiFi network. Access points require Ethernet cables. WiFi range extender, also called WiFi repeater, extends WiFi network within a house. WiFi extender has limitations - proximity to WiFi router, no more than two extenders in a chain, possible instability, dropouts of the WiFi connection. Prices are from $40.
Overpower adapters extend ethernet from the router to other rooms using power lines; no cables required. Prices are from $60 for a pair.
Basic routers and modems in one are suitable for home or office internet. They provide a WiFi reception area within a house, typically within 15 meters radius on open space with up to 20 WiFi simultaneously connected devices. Prices are from $40.
WiFi and mesh networks with several access points are good for office or public WiFi installations, house wide WiFi and where 100+ WiFi users connected at once. Mesh WiFi systems usually provide additional management, monetization and security features. However, a pure wireless WiFi mesh may not be effective in big houses with concrete walls and ethernet cabling required. Prices are from $130 per device.
Network switches extend the number of Ethernet ports available from the router. POE network switches supply power to WiFi access points. Prices are from $30
Manly Electronics provides WiFi installations and consultancy