The History of the Internet
Understand how a research network became global infrastructure, and why its early design choices still shape your daily life.
This course is for members
$9 unlocks every course in the library, this one included, plus a credit to build a topic of your own and at least 10 new courses every month.
What you will learn about The History of the Internet
The 7-day sprint
- Before the Internet: Circuits and Packets. The internet became possible when engineers replaced dedicated circuits with packet switching, where data is chopped into addressed chunks that travel independently.
- ARPANET and the First Four Nodes. ARPANET, funded by the U.S. Defense Department's research agency in 1969, was the first large network to prove packet switching worked in practice.
- TCP/IP and the Network of Networks. The internet is not one network but a set of rules, TCP/IP, that lets many independent networks act as one.
- Names, Numbers, and Who Governs Them. The internet needs a few coordinated resources, addresses and names, and the story of who controls them is the story of internet governance.
- From Research Network to Public Utility. The internet became public when the U.S. government backbone that banned commercial traffic was replaced by competing private networks.
- The Web, Browsers, and Search. The World Wide Web is one application built on top of the internet, and its openness is what turned a network into a mass medium.
- Broadband, Mobile, and Recentralization. Since 2000 the internet has become always-on, mobile, and dominated by a handful of platforms and cloud providers, which pulls against its decentralized design.
The 80/20: the 7 concepts that matter most
- Packet switching
- Internetworking and the narrow waist of IP
- The end-to-end principle
- Open, running-code standards
- Naming and addressing at scale
- The Web is an application, not the internet
- Commercialization and the pull toward the center
The core idea, explained like you are 5
The internet is a network of networks: independent systems that agree on a shared set of rules for breaking data into addressed packets and passing them along, with no one in charge of the middle.
Then the quiz and the ladder
10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.