Following a Request Home: teacher key

The Internet, grade 4 edition, written for 4th grade. Watch a website request travel from your browser to a server and back. Learn about addresses, names, packets, the web's start and the cables under the sea.

Read the book. Print this page for the key.

Questions and answers

1. What does a browser do first to open a website?
   • Uses DNS to find the server's address (answer)
   • Cuts the page into cables
   • Asks for a 404
2. What does a 404 message mean?
   • The server cannot find the page (answer)
   • The page loaded fast
   • The cable is broken
3. What can the receiving computer do if a packet is lost?
   • Ask for just that packet again (answer)
   • Ask for a new browser
   • Wait for a shark
4. What did Tim Berners-Lee invent in 1989?
   • The World Wide Web (answer)
   • The ARPANET
   • A router
5. What is email?
   • A kind of cable
   • Another service built on top of the internet (answer)
   • A part of the sea floor

Words

• server: gives out pages
• packets: small pieces
• forerunner: earlier version
• wireless: without cables