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→DSL and Cable Modems
== DSL and Cable Modems ==
The word ''modem'' comes from the term ''modulator/demodulator'' which describes the conversion of digital signals to analog and vice versa. Original modems were used to transfer data between computer systems over analog phone lines. The modem converts the data form the digital form understood by the computer to the analog form required by the phone line. At the receiving end the process is reverse, converting the analog signal back to digital form. Most modems today are actually either Digital Subscriber Line (DSL) or Cable modems. The term ''modem'' is now something of a misnomer since no conversion to analog form takes place. The name modem appears to have stuck however. Instead these modems convert the signals used by the DSL or Cable provider into standard Ethernet signals suitable for consumption by network devices.
Both Cable and DSL modems provide continuous broadband connectivity to the internet. This comes with considerable advantages in terms of speed and convenience but also includes the risks inherent in having computers connected to a constantly active internet connection.