Here is what I have written so far (please note, this is an outline so there is some details that I will go into, may not be listed)
Spaulding For Children
Computer Education Lesson 1 - History
Basic History of the Internet
- Started as ARPANET as a Military communications network. It was SOMEWHAT designed to run when different nodes are non-functioning (bombed and gone) that the system could communication around the missing nodes.
- ARPANET (Advanced Research Projects Agency NETwork)
- Plans were conceived in the early 1960’s and came into reality in 1969
- 1983, the military pulled out to ARPANET and formed MilNet, thus leaving the ARPANET network no longer being a Military project (ownership was handed over to educational and commercial institutions)
- 1990s was becoming a largely International effort with mostly commercial and educational hosts, no longer testing and military.
Growth of the Internet
SOURCE -
http://www.isc.org/index.pl?/ops/ds/host-count-history.php
- 1969 – 4 hosts online (when the network first was created)
- 1975 – 57 hosts online
- 1981 – 213 hosts online
- 1985 – 1,961 hosts online
- 1990 – 313,000 hosts online
- 1995 - 6,642,000 hosts online
- 2000 - 93,047,785 hosts online
- 2005 - 353,284,187 hosts online
- 2007 - 489,774,269 hosts online
General Technology History
INTERESTING SOURCE -
http://www.computerhope.com/history
- 1940’s – Mainframes, are huge room-sized computers that used vacuum tubes.
- 1960’s – Minicomputers, started using transistors and first generation of integrated circuits
- 1980’s – Microcomputers, used integrated circuits.
Computer Education Lesson 2 – How the Internet Works
TCP\IP – Transmission Control Protocol/Internet Protocol
- All machines hooked on the network (Internet) get an address in the format of xxx.xxx.xxx.xxx (xxx is a number from 1 to 256)
- This formatting grants approximately 4 billion possible addresses
- Internet Protocol, Version 6 (slowly being adopted) – approximately 4 Trillion addresses
- Each computer is given an address, and sent to its gateway router, where its then routed again to another, and so on, till it gets to the destination IP address
DNS – Domain Name Service
- DNS serves basically as a “phone book” to make working in the Internet easier than trying to remember IP addresses of Internet hosts
- EXAMPLE – yahoo.com is easier to remember than 66.94.234.13
- First Top-Level Domains - .org, .net, .com, .gov, .arpa, .mil
- Second Level Domains – yahoo.com, whitehouse.gov, navy.mil
- Hostname Domains –
www.yahoo.com,
www.whitehouse.gov,
www.navy.mil
FTP – File Transfer Protocol
- Used to transfer data from one host to another
- EXAMPLE –
ftp://ftp.example.com
HTTP – HyperText Transfer Protocol
- The first version of what we see today as “the web”
-
http://www.yahoo.com
Email – Not a protocol
- Email does not really have a protocol associated to it like ftp or http.
- Formatting of email is always username@domain
- Username = This is basically an “account” or a specific user
- @ = This differentiates the text between a user, and the domain its associated to
- Domain = This is where the username is housed, for instance,
[email protected], this means the user john, at the mail system, yahoo.com