Discard


Discard
Discard im TCP/IP‑Protokollstapel:
Anwendung Discard
Transport UDP TCP
Internet IP (IPv4, IPv6)
Netzzugang Ethernet Token
Bus
Token
Ring
FDDI

Der Discard-Netzwerkdienst ist ein einfacher Dienst der Internetprotokollfamilie. Aufgabe des Dienstes ist es, alle empfangenen Daten zu verwerfen. Es wird keine Antwort gesendet. Er eignet sich somit zum Test und zur Fehlersuche während der Entwicklung von Clientprogrammen.

Für den Discard-Dienst ist der TCP- und UDP-Port 9 reserviert. Das Discard-Protokoll ist in RFC 863 spezifiziert.

Bei Unix-Systemen ist der Discard-Dienst – genauso wie die weiteren einfachen Netzwerkdienste (Daytime, Echo etc.) – üblicherweise direkt im inetd implementiert. Bei Windows-Systemen befinden sich diese Netzwerkdienste in der optionalen Windows-Komponente Einfache TCP/IP-Dienste.


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  • discard — vb Discard, cast, shed, molt, slough, scrap, junk mean to get rid of as of no further use, value, or service. Discard literally denotes the getting rid of a card from one s hand in a card game, usually because they are worthless or can be… …   New Dictionary of Synonyms

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  • Discard — Dis*card , v. t. [imp. & p. p. {Discarded}; p. pr. & vb. n. {Discarding}.] 1. (Card Playing) To throw out of one s hand, as superfluous cards; to lay aside (a card or cards). [1913 Webster] 2. To cast off as useless or as no longer of service; to …   The Collaborative International Dictionary of English

  • Discard — Dis*card , v. i. (Card Playing) To make a discard. [1913 Webster] …   The Collaborative International Dictionary of English

  • discard — [dis kärd′; ] for n. [ dis′kärd΄] vt. [OFr descarter, prob. < des + carte: see DIS & CARD1] 1. Card Games a) to remove (a card or cards) from one s hand b) to play (a card not a trump and not in the suit led) when holding no cards in the suit… …   English World dictionary

  • Discard — Dis*card , n. (Card Playing) The act of discarding; also, the card or cards discarded. [1913 Webster] …   The Collaborative International Dictionary of English

  • discard — I noun castaway, castoff, debris, declasse, derelict, detritus, evacue, foundling, leaving, oddment, proscrit, reject, remainder, remnant, waste II index abandon (relinquish) …   Law dictionary

  • discard — (v.) 1590s, lit. to throw a card away, from DIS (Cf. dis ) away + CARD (Cf. card) (n.). Figurative use (in a non gaming sense) is first recorded 1580s. In the card playing sense, decard is attested by 1550s. Related: Discarded; discarding. As a… …   Etymology dictionary

  • discard — [v] get rid of abandon, abdicate, abjure, adios*, banish, can*, cancel, cashier, cast aside, chuck, deep six*, desert, dispatch, dispense with, dispose of, dispossess, ditch, divorce, do away with, drop, dump, eject, eliminate, expel, forsake,… …   New thesaurus


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