History of the Internet

These are some questions related to the history of the internet.

There is a list of internet pages telling the history of the internet at this site:
http://www.isoc.org/internet/history/
Some of the best of these are
Webopedia: http://www.webopedia.com/quick_ref/timeline.asp
PBS Nerds: http://www.pbs.org/opb/nerds2.0.1/timeline/
http://www.w3.org/History.html
Hobbes Internet Timeline: http://www.zakon.org/robert/internet/timeline/
There is a Japanese version of the Hobbes Internet Timeline.
Another source is the Wikipedia. http://en.wikipedia.org/wiki/History_of_the_Internet

1. What was Sputnik, and how is it related to the internet?
2. What was ARPA (and DARPA)?
3. What is Packet Switching? (watch this, too) http://www.pbs.org/opb/nerds2.0.1/geek_glossary/packet_switching_flash.html
4. Who developed Packet-Switching?
5. Why was it developed? Why was it needed? What advantages did "packet-switching" have?
6. When was the first e-mail sent?
7. What were the first four nodes on the internet?
8. When was the word "Internet" first used, and by who?
9. What is Ethernet? When did it develop? Who developed it? Why was it important?
10. When and where was the Domain Name System developed?
11. What is Tim Berners-Lee famous for?
12. How did HTTP change the internet?
13. What was WWW? What made it possible?
14. When did the use of "www" pass the use of the "ftp" protocol?
15. What was "Mosaic"?
16. Who invented the phrase "surfing the internet"?
17. What were the "browser wars"? Who was fighting? Who won?
18. When were there 10,000,000 sites on the internet? When were there 20,000,000? When were there only 10,000?
19. What year were Netscape and Amazon started?
20. When did YouTube get started?

WWW Growth: (as measured by the number of Web sites or Servers)

12/90 1
12/91 10
12/92 50
12/93 623
12/94 10,022
01/96 100,000
12/96 603,367
12/97 1,681,868
12/98 3,689,227
12/99 9,560,866
12/00 25,675,581
12/01 36,276,252
12/03 45,980,112
12/04 56,923,737
12/05 74,353,258
11/06 101,435,253

Sites = # of web servers (one host may have multiple sites by using different domains or port numbers)