Who Built the Internet: teacher key

The Internet, grade 6 edition, written for 6th grade. Meet the people and the rules behind the internet. Follow TCP/IP from the 1970s, the ARPANET, the first websites and the Mosaic browser, then see what carries your data across the sea.

Read the book. Print this page for the key.

Questions and answers

1. Who designed TCP in the 1970s?
   • Vint Cerf and Bob Kahn (answer)
   • Tim Berners-Lee and Robert Cailliau
   • Two CERN physicists
2. What does a DNS server do if it does not know a website's address?
   • It can ask another DNS server (answer)
   • It deletes the website
   • It sends a 404
3. What could the Mosaic browser show together?
   • Show pictures and text together (answer)
   • Send email
   • Replace cables
4. What does HTTPS use TLS for?
   • To scramble what a browser and a server send (answer)
   • To lay undersea cables
   • To name websites
5. What causes most damage to undersea cables?
   • Sharks
   • Fishing and ships dragging anchors (answer)
   • Satellites

Words

• protocols: shared rules
• router: sends packets onward
• forerunner: earlier version
• scramble: mix up