To connect to wireless Internet, a wireless router and a wireless networking card are needed. Some signals can be accessed without a router, and wireless networking cards are usually built into devices like smartphones and computers.
A wireless router broadcasts information from a modem that is connected to the Internet. Many businesses have wireless "hot spots" that customers can use to access wireless or Wi-Fi services provided by one central router.
Wireless networking cards, also called Ethernet cards, are built into devices so that they can receive the signals from wireless routers. Smartphones and many tablets can also receive the internet through cell phone networks. This type of wireless internet, often called mobile internet, has a much greater range than the signal sent by a wireless router, so users don't have to stay near a hot spot.