Networking Fundamentals for System Design Interviews
Understand the networking stack from TCP/IP to HTTP/3. Learn DNS resolution, the TLS handshake, WebSockets vs SSE, and how CDNs reduce latency — all through practical analogies.
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Understand the networking stack from TCP/IP to HTTP/3. Learn DNS resolution, the TLS handshake, WebSockets vs SSE, and how CDNs reduce latency — all through practical analogies.
Build composable HTTP middleware in Go for logging, auth, rate limiting, and recovery using standard library patterns.
Build a production-ready HTTP server in Go using only the standard library: routing, middleware, timeouts, graceful shutdown, and structured logging.
Compare Express and Fastify on performance, ergonomics, plugin model, and TypeScript support to pick the right HTTP framework for your project.
Apply REST design best practices for resources, naming, status codes, pagination, and versioning to build clean, durable APIs.
Design clear, consistent error responses for REST APIs using HTTP status codes, problem details, and error envelopes that clients can actually handle.
How to design REST endpoints that accept many items at once: request shape, partial success, error reporting, idempotency, and limits that keep your API healthy under load.
A practical walkthrough of HTTP methods — semantics, safety, idempotency, body conventions, and the differences between POST, PUT, and PATCH. Plus OPTIONS and HEAD.
A practical tour of HTTP status codes — 2xx success, 3xx redirects, 4xx client errors, 5xx server errors. Which to return when, and the common mistakes to avoid.