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Taught by Captain CircuitNetworking

How the Internet Works

Packets, DNS, TCP/IP — explained with diagrams you'll actually remember.

4 hours 10 lessons beginner
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Course overview

Demystify the internet. We'll trace a single web request from your browser all the way to a server across the world, and back.

What you'll learn

  • Describe what happens when you type a URL
  • Explain DNS, IP addresses, and ports
  • Read a basic network diagram
  • Use simple tools like ping and traceroute
Curriculum

3 modules · 10 lessons

  1. 01

    The Trip a Packet Takes

    3 lessons
    • 1.1The OSI model in plain words 24 min
    • 1.2IP addresses and subnets 24 min
    • 1.3Ports and sockets 24 min
  2. 02

    Names and Numbers

    3 lessons
    • 2.1DNS resolution 24 min
    • 2.2HTTP vs HTTPS 24 min
    • 2.3TLS in 5 minutes 24 min
  3. 03

    Hands-On Tools

    4 lessons
    • 3.1ping 24 min
    • 3.2traceroute 24 min
    • 3.3nslookup / dig 24 min
    • 3.4Reading curl output 24 min
Ready when you are

Enroll in How the Internet Works

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