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An internal modem is going to be one which fits into a PCI or other expansion slot on your computer and thus communicates directly with the BUS on your motherboard.
An external modem connects to a computer via a serial port, parallel port or USB port. This means it will need to go through a controller chip before being allowed access to the main system BUS.
If you are referring to analog modems (aka, dial up) then the difference will be very little. It is more important to get a "Hardware" modem and not a "Win" modem which uses the CPU of your machine to emulate a controller chip, thus causing it to slow down slightly. Of course on modern PC's this is negligible.
If you mean a modem for DSL or Cable for example most will be external. Usually connected to a router of some kind and then fed to your computer(s) with network cables which would be transparent to the computer.
Hope this helps!
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Why are external modems more expensive than internal devices?
An internal modem consists of a card that is installed in the computer, it has no additional wires or hardware. An external modem is more expensive to produce because, in addition to the card, there is the plastic housing that contains it, indicator lights, and cables to connect it to your computer.
Can A modem can be internal (in the computer) or external (outside the computer).?
Yes, modems can be both internal and external.
When a serial port is used by an external modem what is the modem called in the documentation?
DTEhttp://www.flashcardmachine.com/hardware.html~tekno
What two ports are most often used to connect an external modem to a PC?
Serial and USB ports are most often used to connect an external modem to a PC.
When using DSL or cable to connect to the internet an external modem is needed?
true
