102Course · Foundation

Internet Fundamentals

The network the blockchain runs on.

The Course

Blockchains run on the internet. Before we can explain how a block propagates in seconds across the globe, the Scholar must hold the OSI model, packets, DNS, and TLS as working knowledge — not vocabulary.

This course is the network layer the rest of the School takes for granted.

Outcomes

01
Describe the OSI layers at a working level.
02
Trace a packet across the internet.
03
Explain DNS, BGP, and TLS.

Prerequisites

— Comfort with a browser and a terminal.

Pacing

~3 hours.

IModule
Networks
The stack, layer by layer.
1. 01The OSI modelVisuals8m
2. 02Packets and routingArticle12m
IIModule
Names and trust
DNS and TLS.
1. 01DNSArticle12m
2. 02TLS and certificate authoritiesArticle12m

A Note from the Faculty

Almost every incident report in this field ends with a networking cause.