BAC-L1-DOT-101Polkadot
Polkadot architecture
Why separate a security chain from a set of execution chains, and what that choice implies for an application builder.
- Level
- L1 — Blockchain developer
- Duration
- 3 h
- Track
- Polkadot
- Maintainer
- Polkadot / Substrate Lead Architect
Learning objectives
- 01Describe the respective roles of the Relay Chain and parachains
- 02Explain what shared security actually covers
- 03Place validators, collators and nominators within the system
Guided lab
Explore a Polkadot test network and identify each architectural component on screen.
Independent lab
Write a two-page note comparing shared and sovereign security for a Cameroonian use case.
Security angle
What the Relay Chain guarantees a parachain — and what it does not, starting with the quality of its runtime.
Assessment
Comparative note assessed on the accuracy of the security model described.