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Year 8 Computing — The internet and the web

Tell the internet apart from the web, and say what has to happen between two machines before a page appears on your screen.

Name: ________________________

  1. 1.Sort each job by whether the browser on your own device does it, or the machine holding the page does it.

    Groups: The browser · The machine holding the page

    • Paints the words and pictures onto the screen
    • Reads the address that was typed in
    • Picks out the right page from the ones it holds
    • Stores the page until somebody asks for it
    • Starts the request off
    • Answers with a copy of the page

  2. 2.Someone unplugs the cable that joins a school to the company supplying its connection. Which of these still works?

    • a) Sending a message to a school in the next city
    • b) Joining a video call with another school
    • c) Opening a file kept on the school's own lab network
    • d) Opening a page from a site in another country

  3. 3.Which of these cannot be done at all by a device that is joined to nothing?

    • a) Adding two numbers in a calculator app
    • b) Drawing a picture in a paint program
    • c) Typing a letter and saving it
    • d) Opening a page it has never opened before

  4. 4.Sort each one by whether it is a page you read, or a piece of the machinery underneath that carries pages about.

    Groups: A page you read · Machinery underneath

    • The connection from a building to the company that supplies it
    • A school's home page opened in a browser
    • The undersea cables that join one country to another
    • A page of exam notices with links to more pages
    • The routers that pass messages along from one link to the next
    • A page of photographs on a library site

  5. 5.Sort each one by whether it runs on the device in front of you, or is a machine somewhere else that answers it.

    Groups: Runs on your own device · A machine elsewhere that answers

    • The browser you type an address into
    • The machine that stores those messages until you ask for them
    • The computer a shop keeps its own pages on
    • A game running on your tablet
    • The machine that keeps the game's list of top scores
    • The app that shows your messages

  6. 6.A shop's page opens on your phone even though the shop's own machine is in another city. Where was that page before you asked for it?

    • a) On the shop's machine, waiting for someone to ask
    • b) Nowhere — the browser invents it from the address
    • c) Inside your phone the whole time
    • d) On the nearest phone tower

  7. 7.Opening one page sends a request out and brings a copy of the page back. Counting the request going out and the page coming back, how many journeys across the network is that?

  8. 8.Put these in the order they happen when someone opens a web page.

    • The machine holding the page finds the one that was asked for
    • The browser draws the page on the screen
    • A copy of the page travels back
    • The address is typed in and entered
    • A request for that page travels out across the network

Answer key — Year 8 Computing — The internet and the web

  1. 1. Reads the address that was typed in → The browser; Stores the page until somebody asks for it → The machine holding the page; Paints the words and pictures onto the screen → The browser; Picks out the right page from the ones it holds → The machine holding the page; Starts the request off → The browser; Answers with a copy of the page → The machine holding the page
  2. 2. c) Opening a file kept on the school's own lab network
  3. 3. d) Opening a page it has never opened before
  4. 4. A school's home page opened in a browser → A page you read; The undersea cables that join one country to another → Machinery underneath; A page of exam notices with links to more pages → A page you read; The connection from a building to the company that supplies it → Machinery underneath; A page of photographs on a library site → A page you read; The routers that pass messages along from one link to the next → Machinery underneath
  5. 5. The browser you type an address into → Runs on your own device; The computer a shop keeps its own pages on → A machine elsewhere that answers; The app that shows your messages → Runs on your own device; The machine that stores those messages until you ask for them → A machine elsewhere that answers; A game running on your tablet → Runs on your own device; The machine that keeps the game's list of top scores → A machine elsewhere that answers
  6. 6. a) On the shop's machine, waiting for someone to ask
  7. 7. 2
  8. 8. 1. The address is typed in and entered 2. A request for that page travels out across the network 3. The machine holding the page finds the one that was asked for 4. A copy of the page travels back 5. The browser draws the page on the screen