Search (33 results, page 1 of 2)

  • × theme_ss:"Datenfernübertragung"
  1. Scheuerer, J.: Onlinebanking (1997) 0.01 
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    Date
    1. 8.1997 14:03:29
    Source
    Com!. 1997, H.8, S.22-24
  2. Duhm, U.: Ring frei zur nächsten Runde (1999) 0.01 
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    Date
    1. 8.1997 14:03:29
    19. 2.1999 20:21:22
  3. Petry, W.; Werner, H.-J.: Anwendertraum: Kommunikations- und Retrieval-Software im Vergleich (1993) 0.00 
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    Source
    Cogito. 9(1993) H.2, S.18-22
  4. Moen, W.: Information retrieval protocols : Z39.50 and Search & Retrieve via URL (2009) 0.00 
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    Abstract
    Information retrieval (IR) protocols support effective and interoperable intersystem search and retrieval. Although intersystem search methods have been envisioned and under development since the 1970s, it was the Z39.50 IR protocol, first released in 1988, that demonstrated real-world possibilities for such search and retrieval. As the networked information environment changed with the emergence of the World Wide Web, the need for standard IR protocols did not disappear, and one can argue the need is even more compelling given both the visible and invisible Web. A new protocol, based on the experience from Z39.50 but simpler and more comprehensible than Z39.50, is now being used for Web search and retrieval. Search and retrieve via URL (SRU) uses Web technologies and standards resulting in a Web friendly protocol that provides standard search access to existing Z39.50 resources and a wide-range of new non-catalog digital resources. This entry provides both an overview of the two protocols and technical details to understand both. A brief discussion of IR and communications protocols provides background to the specifics of these two IR protocols. Although communication protocols are by their nature technical specifications, this entry focuses on an overview of the functions and capabilities of the protocols. It uses technical concepts and terminology from the protocols to help explain how the protocols work but limits discussion of technical details.
  5. Deussen, N.: Sogar der Mars könnte bald eine virutelle Heimat bekommen : Gut 4,2 Milliarden sind nicht genug: Die sechste Version des Internet-Protokolls schafft viele zusätzliche Online-Adressen (2001) 0.00 
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    Abstract
    In der Virtualität wird's eng. Die Möglichkeiten des Scheinbaren sind anscheinend ausgereizt. Es mangelt bald an InternetAdressen. Wenn WhirIpools und Wasclunaschinen ihren eigenen Zugang zum Internet brauchen, wird der Vorrat an Kennzahlen knapp. Um dem drohenden Mangel zu begegnen, wird seit Jahren an einer überarbeiteten Fassung des Internet-Protokolls (IP) gebastelt. Doch die Neuauflage hat bis auf ein paar Testläufe - bisher ihren Weg ins Netz noch nicht gefunden. Für Aufregung sorgte sie dennoch bereits: wegen Datenschutzproblemen. Für die Kommunikation zwischen Computern im Internet gibt es eine Art Knigge. Die protokollarische Vorschrift legt fest; wie die Rechner Daten untereinander austauschen. Doch zuvor brauchen die Maschinen Namen (wie www.fr-aktuell.de) und Anschriften (hier: 194.175.173.20), damit sie sich einander vorstellen (Shake Hands) und später Daten schicken können. Vergeben werden die Bezeichnungen von der Internet Corporation for Assigned Names and Numbers Icann). Den ersten Vorschlag für eine einheitliche Übergaberegelung machten Bob Kahn und Vint Cerf im Jahr 1974. Damals versuchten im inzwischen legendären, militärisch genutzten Arpanet kaum tausend Großrechner an etwa 250 Standorten miteinander zu kommunizieren. Um Ordnung in das Sprachengewirr der verschiedenen Bautypen zu bringen, mussten Regeln her. Die Idee entwickelte sich zum Protokoll, das nach Informatik-Manier mit dem Kürzel TCP/IP belegt wurde. Mit etwa 100000 angeschlossenen Computern wurde das Netz 1983 zivil - und TCP/IP zum offiziellen Standard. Derzeit regelt die vierte Version des Internet-Protokolls (IPv4) den Bit-Transport. Die Adresse wird jedem Datenpaket vorangestellt. Sie besteht aus Ziffern und ist exakt 32 Bit lang. Daraus ergeben sich mehr als 4,2 Milliarden Zahlenkombinationen. Genug für einen Globus, auf dem erst kürzlich der sechsmilliardste Erdenbürger das Licht der realen Welt erblickte - dachten die Computer-Operateure damals. Dann kam das World Wide Web.
    Der Geniestreich aus dem Europäischen Labor für Teilchenphysik (Cern) in Genf machte aus dem Wissenschaftsnetz ein Massenmedium. Zudem erfuhr die elektronische Post einen Aufschwung. Das Wachstum der Netze sprengt alle Erwartungen", resümiert Klaus Birkenbihl vom InformatikForschungszentrum GMI). Jede Web-Site, jede E-Mail-Box, jeder Computer, der per Standleitung online ist, braucht eine eindeutige Identifizierung. Die Schätzungen, wie viele IPv4-Adressen noch frei sind, schwanken zwischen 40 und zehn Prozent. Der Verbrauch jedenfalls steigt rasant: Die Anzahl der WebSites steuert derzeit auf eine Milliarde zu, weit mehr Netznummern gehen bereits für E-Mail-Anschriften drauf. Den Adressraum weiter ausschöpfen werden demnächst die intelligenten Haushaltsgeräte. Der Laden an der Ecke will wissen, welcher Kühlschrank die Milch bestellt hat, die Videozentrale braucht für das Überspielen des Films die Kennung des PC-Recorders, der Computer des Installateurs benötigt die IP-Anschrift der Heizungsanlage für die Fernwartung. Handys, die später Nachrichten übers Internet schicken, und Internet-Telefonie gehen möglicherweise leer aus. Doch bevor Internet-Adressen zur heiß begehrten Schieberware werden, soll ein neues Adresssystern mit mehr Möglichkeiten her. Schon 1990 hatte sich die Internet Engineering Task Force (IETF) Gedanken über einen neues Internet-Protokoll mit einem größeren Adressangebot gemacht. Im IETF kümmern sich Forscher, Soft- und HardwareIngenieure um die fortlaufende Verbesserung von Architektur und Arbeit des Netz werks. Eine ihrer Arbeitsgruppen prognostizierte, der IPv4-Vorrat gehe 2005 zu Ende. Fünf Jahre dauerte es, dann waren sich alle Internet-Gremien einig: Eine neue Protokollversion, IPv6, muss her. Dann passierte weiter nichts. Endlich verkündete 1999 Josh Elliot von der Icann, ab sofort würden neue Anschriften verteilt. Ein historischer Moment", freute er sich.
    Source
    Frankfurter Rundschau. Nr.79 vom 3.4.2001, S.29
  6. Eberl, U.: UMTS++ : Perspektiven (2001) 0.00 
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    Date
    31.12.1996 19:29:41
  7. Petry, W.: Datenreisen billiger : wie man Telekommunikationskosten sparen kann (1994) 0.00 
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    Source
    Cogito. 10(1994) H.4, S.17-22
  8. Matthews, J.R.; Parker, M.R.: Local Area Networks and Wide Area Networks for libraries (1995) 0.00 
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    Date
    30.11.1995 20:53:22
  9. Kniszewski, P.: T-Online hat die Nase vorn (1997) 0.00 
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    Date
    1. 8.1997 14:03:29
  10. ¬Die 50 besten Tips zur neuen Software : T-Online 2.0, Netscape Navigator, Microsoft Internet-Explorer (1997) 0.00 
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    1. 8.1997 14:03:29
  11. Durchstarten mit dem T-Online-Lotsen : neue Startseite (1997) 0.00 
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    Date
    1. 8.1997 14:03:29
  12. Pelton, J.N.: Telekommunikationssysteme des nächsten Jahrhunderts (1998) 0.00 
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    Date
    31.12.1996 19:29:41
  13. Lang, M.: Neue Hardware braucht das UMTS-Land : Infrastruktur (2001) 0.00 
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    Date
    31.12.1996 19:29:41
  14. Otten, D.: Peilstation in der Westentasche (2001) 0.00 
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    Date
    31.12.1996 19:29:41
  15. Sterbak, R.: ¬Die Mega-Handys : Endgeräte (2001) 0.00 
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    31.12.1996 19:29:41
  16. Zöbelein, K.: Dringend gesucht : die Killer-Applikation (2001) 0.00 
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    Date
    31.12.1996 19:29:41
  17. Berezak-Lazarus, N.: ADSL - Auf der Überholspur durch die Multimedia-Welt (1999) 0.00 
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    Footnote
    Rez. in: Internet Professionell 2000, H.2, S.22
  18. Joy, F.; Murray, R.: ¬The World-Wide Web and Z39.50 : which way for libraries? (1995) 0.00 
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  19. Rötger, A.: ¬Die Schrittmacher : Standards (2001) 0.00 
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    Date
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  20. Cerf, V.G.: Netztechnik (1995) 0.00 
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    Pages
    S.22-31

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