The Page That Came Back: teacher key

The Internet, grade 3 edition, written for 3rd grade. What happens when you type a website name? Follow a request to a server, learn how addresses and names work, and see how a message travels in small pieces called packets.

Read the book. Print this page for the key.

Questions and answers

1. What does a server do when you open a website?
   • Sends the page back (answer)
   • Draws the page
   • Turns off the page
2. What does the Domain Name System do?
   • Cuts messages into packets
   • Finds the IP address for a website name (answer)
   • Builds undersea cables
3. What can the receiving computer do if a packet is lost?
   • Ask for just that packet again (answer)
   • Delete the whole file
   • Wait for the sky
4. Where is the cloud?
   • In the sky
   • In servers in data centers (answer)
   • On the moon
5. Why is the web not the same as the internet?
   • The web is one service that runs on the network (answer)
   • The web is a kind of cable
   • The web is a router

Words

• server: gives out pages
• packets: small pieces
• wireless: without cables
• cloud: servers online
• address: where something is