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ODW 6.2

Our Digital World 6.2

communications system In the context of a computer network, a system that includes sending and receiving hardware, transmission and relay systems, common sets of standards so all the equipment can “talk” to each other, and communications software.
network protocol A rule for how data is handled as it travels along a communications channel.
analog signal An electronic signal formed by continuous sound waves that fluctuate from high to low.
digital signal A discrete electronic signal that is either high or low. In computer terms, high represents the digital bit 1; low represents the digital bit 0.
modem A piece of hardware that sends and receives data from a transmission source such as your telephone line or cable television connection. The word modem comes from a combination of the words modulate and demodulate.
frequency The speed at which a signal can change from high to low; a signal sent at a faster frequency provides faster transmission.
bandwidth The number of bits (pieces of data) per second that can be transmitted over a communications medium.
broadband Any communications medium that is capable of carrying a large amount of data at a fast speed.
kilobit per second (Kbps) A transmission at a rate of 1 thousand bits per second.
megabit per second (Mbps) A transmission at a rate of 1 million bits per second.
gigabit per second (Gbps) A transmission at a rate of 1 billion bits per second.
terabit per second (Tbps) A transmission at a rate of 1 trillion bits per second.
petabit per second (Pbps) A transmission at a rate of 1 quadrillion bits per second.
Created by: softcrylic