18. The Size of the Internet

• The Internet began in 1969 with 4 network nodes...

• Since 1990, it has grown and gained acceptance faster than anything else in human history.

• 433.2M hosts are the DNS as of Jan 2007, of them

  • 926.5K named www

  • 547K named mail

• Over two billion users exist worldwide...

• Over 200M users in the US...

  • ...As of Jan 2007, 95% of schools, >70% of classrooms, and 85% of households have Internet access in the U.S.