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octet

An octet is a group of eight bits that are transmitted, conveyed or processed together (e.g. PCM data word), but which do not necessarily have to have anything to do with each other.

The term octet originates from CCITT and is used synonymously with the byte, although a byte can also differ from eight bits, whereas the octet always consists of eight bits. In addition, the bits of a byte form a unit, for example an ASCII character. The byte is mainly used for memory sizes. The octet is used in long-distance data transmission and describes frames and data packet formats which, in addition to the user data, also include the start bits, stop bits and check bits.

Octets represent 256 (`2^8`) values that can be written in binary, hexadecimal or decimal notation. Likewise, octets can be divided into two nibbles of four bits each.

Informations:
Englisch: octet
Updated at: 22.01.2022
#Words: 142
Links: phase change material (PCM), data, word, Comité Consultatif International Télégraphique et Téléphonique (CCITT), byte (B)
Translations: DE
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