Unit 2: The Internet

1. Warm Up/Journal:

• What is the Internet?

• What questions do you have about how the Internet works?

Try answering:

• When you enter a web address in a browser and hit enter, what happens? At some point you see the web page in the browser, but what happens in between? What are all the steps?

• Write down the series of things that you think (or have heard) happen right after you hit Enter. What happens first, second, third and so on.

(Don’t worry if you don’t know all the pieces or how they all fit together. If you don't know a step, or you are fuzzy on some details, or there's a gap, that's okay. Just write down the parts that you know.)

2. Watch what is the Internet? Take notes Lesson 1 & 2

3. Read The ingredients of the Internet on Khan Academy

4. Complete Unit 2 Lesson 1 Check for Understanding on Code.org

5. Complete Khan Academy Connecting networks Lessons (Computer networks, Physical network connections, Practice: Computer networks, Bitrate, bandwidth, and latency, Practice: Bit rate and bandwidth)

6. DNS Unplugged Activity-When you walked into the room I handed each of you a slip of paper. This is your IP address. We know that in order to communicate on the internet you need to know the IP address of the other computer. Your goal is to create a list in your journals of every one of your classmates IP addresses. The only rules:

• You may walk around the room

• You may share information with classmates

• You may talk / share information with only ONE classmate at a time

(After Activity Discuss: Why do you think I was switching IP addresses?)

Journal: If IP addresses can change, is there a better way for everyone to know everyone else’s IP address?

7. Watch The Internet: IP Addresses and DNS - Video As we watch the following video take notes on:

• How does the DNS solve the problem of translating domain names like example.com into IP addresses?

• How does the DNS help the Internet scale?

8. Explore U2 Lesson 6 Internet Simulator

• No talking at all, not even to get your partner’s IP address

• Ask the DNS for the IP address of a user by sending GET username

• Use the IP address you get back to communicate with at least 2 friends. You can talk about: In your ideal world what time would school start? or What would you eat for your perfect meal?

• Watch Routing Code HS code HS Routing answer in journal:

1. Which of the following are true about Internet routing? (remember to write complete question and your response)

I - For any two points on the Internet, there exists only one path between the two points
II - Routing on the Internet is fault tolerant and redundant

• 1. • I only

     • II only

     • Both I and II

2. What does it mean for the routing system to be “redundant”? Is redundancy a good or bad thing?

9. Review the Unit 2 Lesson 6 Layers of the Internet Activity Guide and Complete Lesson 6 Check for Understanding

10. Finish Khan Academy The Internet Unit ( Addressing the Internet, Routing with redundancy, Transporting packets, Web protocols, Scalable systems, The Internet protocol suite, open protocol development and the digital divide).

11. Internet Dilemmas Project: In this project, students explore a relevant Internet dilemma: Net Neutrality, Internet Censorship, or the Digital Divide. Students apply their knowledge of how the Internet works to address the core question related to their chosen dilemma. These project lessons address the "so what" question - why is it important to learn about how the Internet works?

*Share out what we've learned about these Digital Dilemmas. I'd like to ask for a couple of volunteers for each Dilemma to quickly share what they've learned about their topic and their recommendations.

10. Complete College Board Review Questions and review for Unit Assessment by practicing Quizlet Flashcards

• Topic 4.1 The Internet

• Topic 4.2 Fault Tolerance

• Topic 5.2 Digital Divide.