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What is modem?


Modem:
The word is made up of two words: “Mo” (modulation) and “Dem” (demodulation).

The work of modem is to convert the digital signal coming from the connected devices(computer) into analog signal and visa-versa so that it can be transferred via telephone line.

Now-a-days modem comes in built in the router so no one pay attention to it

There are a couple of different modems, and the one that will work for your situation depends on the internet connection that you have.

  • Cable – Cable modems use coaxial cables. One end connects to the back of the modem and the other end connects to your wall or to the back of your cable box. Cable internet is considered to be “high speed” internet.
  • DSL – DSL can either connect to an external modem (like cable, but a different plug-in), or your computer will already have an internal modem that will dial-in through your phone line. Unlike dial-up, you can still access the internet while talking on the phone.
  • Dial-Up – Dial-up is the oldest form of internet connection. It uses your phone line to connect to your ISP. Dial-up modems are much slower compared to cable and DSL. Also, if you only have one phone line you won’t be able to access the internet at the same, you’re talking on the phone.

Modem is used when we want only one device to get connected to internet.But when we want more than one device to connect to the internet then we connect router after modem.

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