An electrical circuit that stores data. An electrical circuit that converts an analog signal to a sequence of numbers. Modem uses a demodulator to receive the signal. Modem does not have any modulator or demodulator. Data can be damaged or lost.
Signal becomes stronger.
Data transmitting become faster. Researchers found they could detect small errors if they added an extra bit to a character s code. Error detector bit. The Internet uses more powerful error detection techniques. LAN is an abbreviation for Local Area Network.