The Rules of the Road: teacher key

The Internet, grade 5 edition, written for 5th grade. Computers on the internet follow shared rules called protocols. See how TCP keeps packets in order, how a packet hops along, how the web began and what really breaks undersea cables.

Read the book. Print this page for the key.

Questions and answers

1. What does TCP make sure of?
   • That packets arrive complete and in order (answer)
   • That cables are laid straight
   • That every page is free
2. What does a router do?
   • Decides where to send data packets next (answer)
   • Writes web pages
   • Makes a website free
3. What message does a server send when it cannot find the page?
   • 200 OK
   • 404 (answer)
   • HTTPS
4. Which one is a service that runs on the internet?
   • Email (answer)
   • A router
   • A cable
5. What causes most damage to undersea cables?
   • Sharks
   • Fishing and ships dragging anchors (answer)
   • Wi-Fi

Words

• protocols: shared rules
• router: sends packets onward
• packets: small pieces