Digital & Data

Bandwidth

Definition

Bandwidth is the maximum data transfer capacity of a communication channel, typically measured in bits per second (bps, Mbps, Gbps).

Explanation

Bandwidth represents the theoretical ceiling, not the actual speed achieved in practice. A fiber link may have 1 Gbps bandwidth but deliver less throughput due to protocol overhead and network congestion. The term originates from radio engineering, where it described the range of frequencies a channel could carry. Consumer broadband plans typically offer 100 Mbps to 1 Gbps downstream bandwidth.

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RELATED TERMS

Bit and Byte

A bit is the smallest unit of digital information, representing a 0 or 1; a byte is a group of 8 bits, capable of representing 256 distinct values.

Binary Prefix

Binary prefixes (KiB, MiB, GiB) denote powers of 1024, in contrast to metric SI prefixes (KB, MB, GB) which denote powers of 1000.

Latency

Latency is the time delay between a data packet being sent from a source and received at its destination, typically measured in milliseconds (ms).

Throughput

Throughput is the actual rate at which data is successfully transferred over a network or system in a given time period, measured in bits or bytes per second.

Clock Speed

Clock speed is the frequency at which a processor executes cycles, measured in hertz (Hz), with modern CPUs operating in the gigahertz (GHz) range.