Modem or Modulator and Demodulator operates as a device combined from an inverter and an internet divider.The modem is connecting to the source of the Internet to invert ADSL or fiber cable into usable internet that we are using for accessing social media and online pages.
On the other hand, the modem can distribute the internet into multiple computer devices at a time.
People are used to knowing modem with LAN outputs, which allows a certain number of devices to connect. These outputs will keep the linked computer running under the same IP address with the source. So, it creates a Local Area Network.
With Wifi setting up, we do not count on the LAN outputs to decide how many computers can access the Internet because there are many eligible.