FW: ADUG: Off Topic : capacity of the internet

From: Emlyn O'regan (oregan.emlyn@healthsolve.com.au)
Date: Wed Jul 02 2003 - 22:54:26 MDT

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    Forwarded with permission of the author. Note that I didn't ask Ander's
    permission to crosspost his answer... Sorry Anders :-(

    Emlyn

    > -----Original Message-----
    > From: Jarrod Hollingworth [mailto:jarrod@backslash.com.au]
    > Sent: Thursday, 3 July 2003 10:01 AM
    > To: members@adug.org.au
    > Subject: RE: ADUG: Off Topic : capacity of the internet
    >
    >
    > > Quick estimate.
    > http://www.ripe.net/hostcount/2003/05/index.html gives
    > > us 20,209,347 internet hosts. Most likely many of these
    > have plenty of
    > > other computers linked to them (like ISPs).
    >
    > Be aware that RIPE is only interested in Europe, the Middle
    > East, Central
    > Asia and African countries located north of the equator. You
    > also need stats
    > from ARIN (america), APNIC (asia-pacific) and LACNIC (latin
    > american and
    > caribbean).
    >
    > Using IPv4 the maximum number of PC's that can be accessible
    > on the Internet
    > via their IP address is 2^32 = 4,294,967,296. The actual
    > number of PC's
    > connected can be quite a bit higher if you take into account
    > NAT. The actual
    > number of Internet *users* (not necessarily online at any one
    > point in time)
    > is also much higher using dynamic IP addressing (temporary
    > connections).
    >
    > Globally in July 2002 the number of hosts with IP addresses
    > totalled more
    > than 160 million.
    >
    > See:
    > http://www.zakon.org/robert/internet/timeline/
    >
    > IIRC some P2P file sharing networks claim to have up to 10
    > million users
    > online at a time and generally *share* around 10PB alone.
    >
    > I would imagine that the total disk space be quite a bit
    > higher (several
    > Exabytes).
    >
    > Regards,
    >
    > Jarrod Hollingworth
    > C#Builder Developer Resources
    > http://www.csharpbuilder.info
    >
    >
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