Lesson Companion – What is in the Digital World?

🧾 Cyber Rangers – Module 1, Session 2

Lesson Companion: What’s in the Digital World?
Student Notes & Thinking Journal

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🎯 What You’ll Learn Today

• How devices connect through networks
• What the internet really is and how it works
• What happens when you send a message online
• How hackers can intercept that data — and how we defend it

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📓 Notes by Topic

Use the space below to take notes while watching the presentation and participating in class.

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🔌 What Is a Network?

🖊 A network is…

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🖊 Devices in my home network include:

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🌐 What Is the Internet?

🖊 The internet is made up of…

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🖊 It works by…

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📦 What Are Data Packets?

🖊 When I send a message, it gets…

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🖊 Each packet has:
☐ A piece of the message
☐ The destination IP address
☐ The sender’s IP address

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🧭 IP Address

🖊 My IP address is like…

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🖊 IP addresses help computers…

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🌍 DNS – Domain Name System

🖊 DNS is important because…

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🖊 Example:
google.com → _______________

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📡 Routers and Switches

🖊 Routers help…

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🖊 Switches connect…

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🐍 Threats in the Network

🖊 Hackers can use tools to:
☐ Intercept traffic
☐ Read unencrypted messages
☐ Trick DNS systems

🖊 The danger is…

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🔐 How Cyber Rangers Defend the Network

🖊 Some tools and techniques we use include:
☐ Encryption
☐ Traffic monitoring
☐ DNS validation
☐ Using secure websites (https)

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💡 Key Terms to Remember

Term	What It Means
Network	________________________________
Internet	________________________________
Packet	________________________________
IP Address	________________________________
Router	________________________________
DNS	________________________________

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🧠 Lab Preview – What to Expect

Today’s lab is about mapping a network using a simulator.
You’ll:

• Build a small virtual network
• Connect 2 computers, a router, and a switch
• Watch how data travels between them

🖊 What I think the lab will look like:

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💬 Reflection

1. What part of today’s session was new or surprising to you?
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2. What do you want to explore more about the internet?
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3. What’s one way hackers could misuse this technology — and how would you stop it?
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