Filter/Tag
10 entries
Capstone: treat the network as unreliable — socket error codes, mandatory error handlers, timeouts at every layer, retries with backoff & jitter, reconnecting clients, and a layered debugging toolkit with Node.js + TypeScript.
How Node handles thousands of connections on one thread, scaling with cluster and worker_threads, load balancers, timeouts, keep-alive, graceful shutdown, and client pooling — bilingual with TypeScript examples.
TCP is a byte stream with no message boundaries — learn delimiter vs length-prefix framing, stateful decoders, and backpressure with socket.write() and drain in Node.js + TypeScript, bilingual.
Why plaintext HTTP is unsafe, how TLS encrypts and authenticates, the handshake, certificates, self-signed dev certs, node:tls and node:https servers — bilingual with runnable TypeScript examples.
WebSockets for real-time push: HTTP limits, the upgrade handshake, ws server + client in Node.js + TypeScript, heartbeats, and when to use SSE/polling instead — bilingual with exercises.
HTTP is text over TCP: raw request/response anatomy, a minimal socket responder, node:http createServer, reading bodies, Content-Length vs chunked, keep-alive — bilingual with runnable TypeScript examples.
How DNS turns hostnames into IP addresses, the resolution chain from your app to authoritative servers, Node.js dns.lookup vs dns.resolve, record types, TTL caching, and dual-stack IPv4/IPv6 — bilingual, with runnable TypeScript examples.
UDP for Node.js + TypeScript: connectionless datagrams with node:dgram, when UDP beats TCP, the 65507-byte limit, no backpressure, and beginner pitfalls — bilingual, with runnable examples.
Open real TCP sockets in Node.js: the three-way handshake, echo server + client with createServer/createConnection, socket events, graceful close, and common pitfalls — bilingual with exercises.
The mental model every network programmer needs: the TCP/IP layers, IP addresses & ports, packets, and the client/server model — with a tiny Node.js + TypeScript demo, bilingual, plus exercises.