Objective

By the end of this lesson, the student will understand the basics of how the internet works, specifically how domain names are translated into IP addresses and what a CNAME record is. They will also learn how to use simple commands to gather information about a website.

Materials and Prep

• A computer with internet access
• A notepad and pencil for taking notes
• Access to a terminal or command prompt for running commands
• Basic understanding of what a website is

Activities

• Introduction to Domain Names: Start by discussing what a domain name is and why we use them. Ask the student to name their favorite websites and what they think happens when they type a URL into a browser.

• Exploring CNAME Records: Explain what a CNAME (Canonical Name) record is. Use a simple analogy, like how a nickname refers to a person, to illustrate the concept. Then, have the student look up the CNAME record for a website using the command line.

• Hands-On Command Line Activity: Guide the student to use the `nslookup` command to find CNAME records. They can practice by trying different domain names. Afterward, have them use the `curl` command to see the website's content. Encourage them to write down their findings.

• Creative Project: Have the student create a fun poster that explains domain names and CNAME records. They can use drawings or printouts of their favorite websites to make it visually appealing.

Talking Points

• "What do you think happens when you type a website name into your browser? Let's explore that!"
• "A CNAME record is like a nickname for a website. It helps point to the real address behind the scenes!"
• "When we use the `nslookup` command, we're asking the internet for information about a website. It's like asking a librarian where to find a book!"
• "Using `curl`, we can see the text and information that make up a website. It's like peeking behind a curtain!"
• "How can we use what we learned today to help us understand the internet better? Let's think of some examples!"