Search (25 results, page 1 of 2)

  • × author_ss:"Charlier, M."
  • × language_ss:"d"
  • × theme_ss:"Internet"
  1. Charlier, M.: Im Cyberspace wird umgebaut : Online-Dienste kämpfen mit neuen Angeboten und immer aufwendigerer Technik um neue Kunden (1996) 0.04 
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    Date
    17. 7.1996 9:33:22
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  2. Charlier, M.: Deutsche Schulmeister (1996) 0.00 
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  3. Charlier, M.: ¬Die Auffahrten zur Datenautobahn sind schon da : auch in der Bundesrepublik wächst das elektronische Supernetz (1994) 0.00 
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  4. Charlier, M.: E-mail vom Kanzler (1995) 0.00 
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  5. Charlier, M.: Richtig vertippt (1999) 0.00 
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  6. Charlier, M.: Kinder im Netz (1999) 0.00 
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  7. Charlier, M.: Bücher digital (1995) 0.00 
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  8. Charlier, M.: Love letters for all (2000) 0.00 
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  9. Charlier, M.: Kekse mit Wanzen (2000) 0.00 
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  10. Charlier, M.: Politik online : nicht immer auf Draht (1995) 0.00 
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  11. Charlier, M.: ¬Das dritte Netz (2000) 0.00 
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  12. Charlier, M.: Niemals kalter Kaffee im Netz : vom Wissenschaftsverbund zur Datenautobahn. Das Internet wird zur globalen Kommunikationsmaschine (1995) 0.00 
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  13. Charlier, M.: Drucksachen (1997) 0.00 
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  14. Charlier, M.: Auf den Datenautobahnen ist ein Tempolimit nicht ungewöhnlich : erste 'Strecken' für Informationsdienste sind nun auch hierzulande befahrbar. Weg zur Online-Illustrierten ist noch weit (1995) 0.00 
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  15. Charlier, M.: Protestnoten in Chiracs Mailbox : Anti-Atomtest-Bewegung nutzt weltweites Datennetz (1995) 0.00 
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  16. Charlier, M.: Streng vertraulich (1996) 0.00 
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  17. Charlier, M.: Comics auf dem Web (1997) 0.00 
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  18. Charlier, M.: ¬Der erste große Crash in der Geschichte des Internet : Es gibt keinen Kontrollmechanismus, der Pannen rechtzeitig erkennen und die Ursachen diagnostizieren könnte (1997) 0.00 
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  19. Charlier, M.: Alles oder nichts : Filter gegen Sex und Gewalt blockieren die politischen Gegner oft gleich mit - und werden von Kindern überlistet (2001) 0.00 
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  20. Charlier, M.: DNS und TLD (2001) 0.00 
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    Abstract
    Dass wir uns im Web bewegen können, ohne nachzuschlagen, wer unter welcher Nummer erreichbar ist, verdanken wir dem Domain Name Service (DNS). Der nimmt uns diese Arbeit ab, meistens so zuverlässig, dass vielen Internet-Nutzern seine Existenz nicht bewusst ist. In Wirklichkeit werden Rechner im Netz mit nummerischen IP-Adressen gekennzeichnet, dargestellt in vier acht Bit-Dezimalen - 194.175.173.20 liest sich das etwa. Und die DNS-Datenbanken wissen: Aufrufe von www.fr-aktuell.de müssen an den Rechner mit dieser Nummer durchgeschaltet werden. Damit es kein Durcheinander gibt, darf jede Adresse nur einmal im Netz präsent sein. Deshalb ist der DNS hierarchisch aufgebaut. Jede Registrierungsstelle, hier zu Lande Denic, die eine IP-Adresse vergibt, meldet die Zuordnung an den Root Server A. Von da wird sie an die Datenbanken der zwölf anderen Server des a.root-server.net weitergegeben - und kann von allen Nameservem weltweit abgefragt werden. Zehn der 13 Knoten stehen in den USA und befinden sich mehrheitlich unter Kontrolle militärischer oder anderer staatlicher Institutionen. DNS-Änderungen gegen den Willen der US-Regierung sind so praktisch unmöglich. Bezeichnungen sind meist zweiteilig aufgebaut: Erst der Name der Domain wie fr-aktuell, dann ein Punkt und schließlich eine übergeordnete Top-Level-Domain (TLD) wie com oder de. Vor dem Domainnamen kann ein Rechnername (oft www) stehen, und davor vielleicht eine Subdomain, die der Inhaber einer Domain auf seinem Rechner nach eigenem Belieben einrichten kann. Hinter der TLD steht ein Slash /". Was danach kommt, gehört zum Pfad einer Datei auf dem Rechner - nicht zur Domain. Anfangs gab es sieben TLD, vergeben von amerikanischen Registraren: com(mercial), Net(work), Org(anization), Edu(cational), Gov(ernement), mil(itary) und int(ernational organisation). In einer ersten Erweiterung kamen Länderdomains dazu, etwa.de für Deutschland, at für Österreich, .ch für die Schweiz. Einige werden leicht zweckwidrig clever vermarktet: Der pazifische Inselstaat Tuvalu verkauft sein Suffix.tv für viel Geld weltweit an TV-Sender, Kongo will mit .cd die Musikbranche aufmischen. Und Tonga profitiert von Adressen wie come.to/sowienoch; ähnlich Österreich mitplay.at/ditunddat
    Type
    a

Years

Themes