Computer Networks: Crash Course Computer Science #28

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Overview

Added

March 17, 2026

Subject & domain

computer-science-advanced · blockchain-cryptography

Grade range

Grade 9 (Freshman)–Grade 12 (Senior)

Page kind

Video

Keywords

John Green Hank Green vlogbrothers Crash Course crashcourse education computing computers crash course computer science compsci networks networking telecommunications world wide web internet LAN ethernet MAC address WiFi CSMA bandwidth switch collision domain message switching router packet switching IP address arpanet TCP/IP intent of things iot

Introduction

Today we start a three episode arc on the rise of a global telecommunications network that changed the world forever. We’re going to begin with computer networks, and how they grew from small groups of connected computers on LAN networks to eventually larger worldwide networks like the ARPANET and even the Internet we know today. We'll also discuss how many technologies like Ethernet, MAC addresses, IP Addresses, packet switching, network switches, and TCP/IP were implemented to new problems as our computers became ever-increasingly connected. Next week we’ll talk about the Internet, and the week after the World Wide Web!

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