Difference between Internel and External modem

Internal modem

Internal modem-It is plugged directly into the CPU.Physically it is in the form of a card plugged into one of the expansion slots on the mainboard on CPU.The advantage is lesser in price and economical compared to external modem.The drawback of is that it has no indicator which is present in external modem.

External modem

External modem-It is connected external to the CPU.It is connected to CPU through an USB.It uses separate voltage source as an adapter.The advantage is its portability so that it can be used for another computer.It is equipped with an indicator which allow us to monitor the status of it.The drawback is it is expensive and need a separate space to put it though small.