Networking Hub

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

Foundational protocols

• TcpIpFundamentals — TCP vs. UDP, the OSI model in practice, the parts that actually matter
• IP Routing and Addressing — CIDR and subnets, longest-prefix match, OSPF vs BGP, NAT, and ARP
• TCP Congestion Control — Slow start, AIMD, CUBIC vs BBR, RTOs, and bufferbloat
• DnsDeepDive — Resolution, caching, edge cases, the operational pain points
• HttpTwoAndHttpThree — Multiplexing, server push, QUIC, what changed

Application-level concerns

• CorsDeepDive — The CORS preflight, headers, common configuration errors
• LoadBalancingStrategies — Round-robin, least-conn, sticky sessions, when each fits
• ReverseProxyPatterns — Nginx, Envoy, what they do beyond load balancing
• API Gateway Patterns — Routing, AuthN, and Aggregation at the network edge

Operations

• NetworkTroubleshooting — traceroute, dig, tcpdump, the diagnostic toolkit

Adjacent clusters

• Web Services and APIs Hub — Application protocols above networking
• Cloud Platforms Hub — Cloud networking specifics (VPC, security groups)
• DevOps and SRE Hub — Operations and on-call concerns