Digital & Data

Bit et octet

Définition

Le bit est la plus petite unité d'information numérique, représentant un 0 ou un 1 ; un octet est un groupe de 8 bits, capable de représenter 256 valeurs distinctes.

Explication

Network speeds are quoted in bits per second (Mbps, Gbps), while file sizes use bytes (MB, GB)—a frequent source of confusion. A 100 Mbps internet connection transfers 100 megabits, or about 12.5 megabytes, per second. ASCII encodes each English character in 1 byte; a UTF-8 emoji typically requires 4 bytes. The 8-bit byte became standard in the 1960s with the IBM System/360.

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