Networking Hub

This cluster covers the networking layer of distributed systems — protocols, routing, security, and the practical knowledge needed to design and troubleshoot networked systems at the application level.

Foundational protocols

- [TcpIpFundamentals](TcpIpFundamentals) — TCP vs. UDP, the OSI model in practice, the parts that actually matter

- [DnsDeepDive](DnsDeepDive) — Resolution, caching, edge cases, the operational pain points

- [HttpTwoAndHttpThree](HttpTwoAndHttpThree) — Multiplexing, server push, QUIC, what changed

Application-level concerns

- [CorsDeepDive](CorsDeepDive) — The CORS preflight, headers, common configuration errors

- [LoadBalancingStrategies](LoadBalancingStrategies) — Round-robin, least-conn, sticky sessions, when each fits

- [ReverseProxyPatterns](ReverseProxyPatterns) — Nginx, Envoy, what they do beyond load balancing

- [API Gateway Patterns](ApiGatewayPatterns) — Routing, AuthN, and Aggregation at the network edge

Operations

- [NetworkTroubleshooting](NetworkTroubleshooting) — `traceroute`, `dig`, `tcpdump`, the diagnostic toolkit

Adjacent clusters

- [Web Services and APIs Hub](WebServicesAndApisHub) — Application protocols above networking

- [Cloud Platforms Hub](CloudPlatformsHub) — Cloud networking specifics (VPC, security groups)

- [DevOps and SRE Hub](DevOpsAndSreHub) — Operations and on-call concerns