What Is a Modem and How Does It Work?
What is a modem?
What is a modem used for?

Computer information is stored digitally, but the information sent through telephones and cables is analog waves.
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History of Modem
What is a modems history?
Now lets get some information about them.
What is a cable modem?
And what are DSL modem and dial-up modem?
This part has given you some information.
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How to Choose a Modem?
Before you purchase a modem, there are some things you should probably consider: