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Clos network — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Clos_network
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-07T18:24:52.862Z
SHA-256 of the archived text: f8aa01769f7ff2ca16e8fdd658be541e67495ee6dc08b6d17aab92be1c0c9072
Stable URL of this page: https://metraipolis.com/documento/dc_bf6de357fa89

How to cite

Clos network — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Clos_network (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_bf6de357fa89 (Metraipolis archive dc_bf6de357fa89, sha256 f8aa01769f7ff2ca16e8fdd658be541e67495ee6dc08b6d17aab92be1c0c9072)

BibTeX

@misc{dcbf6de357fa89,
  title = {Clos network — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Clos_network},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_bf6de357fa89; sha256 f8aa01769f7ff2ca16e8fdd658be541e67495ee6dc08b6d17aab92be1c0c9072},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Clos_network. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

A Clos network is a multistage telecommunications network that provides a non-blocking means of connecting an input to an output. It has been used in both circuit-switched and packet-switched networks. It was invented by Edson Erwin in 1938 and first formalized by the American engineer Charles Clos in 1952. By adding stages, a Clos network reduces the number of crosspoints required to compose a large crossbar switch. A Clos network topology (diagrammed below) is parameterized by three integers n, m, and r: n represents the number of sources which feed into each of r ingress stage crossbar switches; each ingress stage crossbar switch has m outlets; and there are m middle stage crossbar switches. Circuit switching arranges a dedicated communications path for a connection between endpoints for the duration of the connection. This sacrifices total bandwidth available if the dedicated connections are poorly utilized, but makes the connection and bandwidth more predictable, and only introduces control overhead when the connections are initiated, rather than with every packet handled, as in modern packet-switched networks. When the Clos network was first devised, the number of crosspoints was a good approximation of the total cost of the switching system. While this was important for electromechanical crossbars, it became less relevant with the advent of VLSI, wherein the interconnects could be implemented either directly in silicon, or within a relatively small cluster of boards. Upon the advent of complex data centers, with huge interconnect structures, each based on optical fiber links, Clos networks regained importance. A subtype of Clos network, the Beneš network, has also found recent application in machine learning.

Tema degli esploratori: matematica e informatica teorica (deposito sistematico; ricerca «topology»).
Fonte: Wikipedia in inglese, voce «Clos network» — https://en.wikipedia.org/wiki/Clos_network
Wikidata Q4418086: «kind of multistage circuit-switching network» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q4418086
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Clos_network?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1373913805, consultata il 2026-11-07T18:20:03.615Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 63a2f47553a957c4d8f514f1cb13cd1c8a069d69d4c7d4fa43ac6ff0db3175a0