https://www.youtube.com/watch?v=3QhU9jd03a0

https://www.youtube.com/watch?v=AEaKrq3SpW8&t=40s

Topic: How Networks Physically Work — Cables, Signals, Devices, IP Basics

❓ Essential Question

How does information physically move through a network, and what devices and components make that possible?

⭐ Key Ideas

• Networks rely on physical media (cables, radio waves, fiber) to move data.
• Devices like modems, routers, and switches each have different jobs.
• Wi-Fi works through radio frequencies and shared access points.
• IP addresses identify devices the same way home addresses identify houses.
• Good infrastructure = fast, stable, reliable networks.

🔑 Vocabulary

Modem — Connects the network to the Internet Service Provider (ISP).

Router — Assigns IP addresses and directs traffic.

Switch — Connects multiple devices inside a local network.