Re: What exactly is a router?
Originally Posted by
drpjkurian
For local area network (LAN) two devices are maimly required they are Modem and Router.
Modem ( Derived from Modulator-demodulator)is the device which converts the telephone signals to internet signals so that the computer can communicate with the web.
Router on other hand is a device which routes the signals from the modem to different computers (just like traffic control).
Nowadays some modems are having inbuilt router,
there is no such thing as a Internet signal and a modem does not convert a signal for use on the Internet.
A modem modulates a signal to be sent to another modem which can demodulate it back into a language the attached computer can understand.
Modems were around and used before the www came about, they can dial straight into another computer without the use of the Internet.
What they do with the modulation/demodulation is to allow one computer to communicate with another often today involving Internet access.
This could be through POTS (plain old telephone system) or *DSL or Fibre or Cable.
At one time they simply converted a digital signal into a analogue one to allow the telephone lines to carry the information which would then be converted back to digital at the receiving modem.
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