# Networks
All Networks notes →1 — HTTP Fundamentals
The HTTP request lifecycle — methods, status codes, headers, and cookies — as the foundation every later chapter in this Part builds on.
networks http-ecosystem book
3 — REST
REST resource design, idempotency, pagination, versioning, and content negotiation as the conventions behind most production HTTP APIs.
networks http-ecosystem book
4 — GraphQL
GraphQL's query, mutation, and subscription model, and the performance trade-offs it makes relative to REST.
networks http-ecosystem book
6 — WebSockets
The WebSocket upgrade handshake and persistent, full-duplex connections that make real-time systems possible over HTTP.
networks http-ecosystem book