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BitTorrent for din bestemor
                        http://nrkbeta.no/bittorrent-for-din-bestemor/


                                      NRKbeta / Eirik Solheim
                            Creative Commons Navngivelse-Del på samme vilkår 3.0 Norge


Wednesday, March 18, 2009
vanlig nedlasting




Wednesday, March 18, 2009
vanlig nedlasting




Wednesday, March 18, 2009
vanlig nedlasting




Wednesday, March 18, 2009
vanlig nedlasting




Wednesday, March 18, 2009
vanlig nedlasting




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




                        .torrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




                       tracker

Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
bittorrent




Wednesday, March 18, 2009
BitTorrent for din bestemor
                        http://nrkbeta.no/bittorrent-for-din-bestemor/


                                      NRKbeta / Eirik Solheim
                            Creative Commons Navngivelse-Del på samme vilkår 3.0 Norge


Wednesday, March 18, 2009

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How to Use BitTorrent for Your Grandmother

Notas del editor

  1. Det hele begynner med at man har en stor fil man vil dele.
  2. Man legger den på en datamaskin på nettet.
  3. Første person som vil ha den laster ned fra maskinen der filen ligger.
  4. Når mange vil ha filen laster alle ned fra den samme maskinen.
  5. Til slutt blir belastningen for høy og ting begynner å gå tregt eller i verste fall krasjer maskinen helt.
  6. Ved bittorrent begynner også det hele med at man har en stor fil man vil dele.
  7. Og den filen må også rent fysisk være til stede på en datamaskin koblet til nettet.
  8. Men filen skal deles opp og spres utover. Til den jobben trenger man et eget system. En del av dette systemet er den såkalte torrent-filen. Dette er en liten fil som forteller maskinen din hvilken mediafil du skal laste ned, hvordan denne kan deles opp, hvor mye plass du må sette av på disken din og hvilken sentral du skal kontakte for å få vite hvor selve mediafilen ligger.
  9. Torrentfilen gjøres tilgjengelig på en datamaskin slik at folk kan laste den ned.
  10. Men man trenger også en sentral som holder styr på det hele. Dette er det som kalles en tracker. Den kan på en måte sammenlignes med en telefonsentral. Den holder orden på hvem som skal kommunisere med hvem, hvor de befinner seg og hvor mange de er.
  11. Trackeren er ofte en egen maskin. Som også må være tilgjengelig på nettet.
  12. Kari, som er den første som vil ha filen dukker opp.
  13. Hun begynner med å laste ned den lille torrentfilen.
  14. Torrentfilen forteller henne hvilken tracker hun skal kontakte og begynner å ta imot infomrasjon. Trackeren forteller henne hvor hun kan få tak i selve videofilen og setter henne i kontakt med den maskinen.
  15. Hun begynner å laste ned.
  16. Under nedlastingen kontakter maskinen hennes trackeren med jevne mellomrom for å fortelle hvor stor del av filen hun har og hvor hun befinner seg.
  17. Kontakten med selve trackeren er bare små forespørsler med jevne mellomrom. Det er selve nedlastingen av mediafilen som går hele tiden og som krever mye kapasitet.
  18. Så kommer Ola og vil ha den samme filen.
  19. Han laster ned torrentfilen han også.
  20. Og får beskjed om å kontakte trackeren. Den sier nå at du kan begynne å laste ned filen både fra det opprinnelige stedet og fra Kari. Som har rapportert at hun har store deler av filen hun også.
  21. Ola begynner så å laste ned fra begge maskinene. Den originale og maskinen til Kari.
  22. Slik fortsetter det etter hvert som det dukker opp flere mennesker som vil ha den store mediafilen. Belastningen på den originale maskinen blir aldri spesielt stor. Etter hvert som folk har lastet ned hele filen og fortsetter å dele den kan i teorien den opprinnelige maskinen kobles helt fra.
  23. Alle må hente den lille torrentfilen, men den er så liten at den ikke overbelaster maskinen der den ligger.
  24. Og alle må snakke med trackeren med jevne mellomrom, men dette er også enkel trafikk. Derfor holder systemet seg oppe og alle som laster ned får store hastigheter og jevn tilgang.