Module 01
Networking basics
Start here if networking is new to you. You find out what a network actually is, meet the devices that build one, see why every device needs an address, and watch a message travel as small packets from one network to another.
Start lesson 1
What is a network? · 6 min · free, no account
PhysicalOpen nowFree, no account
What you'll operate
- What a network is, and the devices in it
- Addresses and packets
- How networks join to make the internet
- lessons
- 6
- minutes
- 46
- no account
- Free
Lessons in this module
- 1What is a network?Watch three devices pass messages, and meet the box that joins them together.Free, no account6 min
- 2Who is this message for?See how every message is labeled with where it is going and where it came from.Free, no account7 min
- 3Why does data travel in small pieces?Cut a photo into packets, put the pieces back together, and count in bits and bytes.Free, no account8 min
- 4How do networks connect?Follow a packet out of your home, from router to router, to a server far away.Free, no account8 min
- 5Who is talking to whom?Meet clients and servers, look a name up, and find the right door on a server.Free, no account8 min
- 6What happens when you open a web page?Follow one tap from your phone to a server and back, then find the fault on a day it fails.Free, no account9 min
Every lesson in this module is open to everyone, with no account, and stays that way.