Blog
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Multer Complete Guide | File Upload Middleware for Node.js
Complete Multer guide for handling file uploads in Express. Learn single/multiple files, storage engines, validation, image processing, and security best practices.
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MySQL Slow Query Tuning with EXPLAIN | Execution Plans & Index Design
Read MySQL EXPLAIN output, tune with type, key, rows, and Extra; use EXPLAIN ANALYZE, composite indexes, ANALYZE TABLE, and covering indexes—InnoDB/MySQ...
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NestJS Complete Guide | Build Scalable Node.js APIs
Build production-grade APIs with NestJS. Covers modules, controllers, services, guards, pipes, TypeORM, and testing with practical TypeScript examples.
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FTP in Practice | Active & Passive Modes, FTPS, SFTP & Firewalls
FTP control and data channels, Active vs Passive, FTPS and SFTP compared, firewall and NAT issues—beginner operations guide to file transfer.
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HTTP: Complete Guide | HTTP/1.1, HTTP/2, HTTP/3, REST, HTTPS & Caching
HTTP requests and responses, methods and status codes, HTTP/2 multiplexing and HTTP/3 over QUIC, HTTPS, caching, and REST API design—2026 practical guide.
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SSH: Secure Remote Access | Keys, ProxyJump, Port Forwarding & OpenSSH
SSH key exchange and authentication, public key setup, ssh config, local and remote port forwarding, ProxyJump, SCP/SFTP, and hardening with OpenSSH.
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TCP: Complete Guide | Handshake, Flow & Congestion Control, Sockets
TCP connections, sliding windows, Reno/CUBIC congestion control, Nagle, TCP_NODELAY, keepalive—reliable transport and production socket tuning.
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UDP in Practice | Low Latency, DNS, Games, Streaming & QUIC
Connectionless UDP: headers, checksums, ports, app-level reliability and ordering, and how HTTP/3 QUIC builds on UDP—realtime-focused guide.
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WebRTC Complete Guide | Peer-to-Peer Video, Audio, and Data Channels
Build real-time peer-to-peer applications with WebRTC. Covers RTCPeerConnection, signaling, ICE/STUN/TURN, media streams, data channels, screen sharing, and production deployment.
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WebRTC: Realtime Communication | Signaling, ICE, STUN/TURN, DTLS & SRTP
Browser P2P realtime: SDP signaling, ICE candidates, STUN and TURN, DTLS handshake, SRTP media—NAT traversal and security for production WebRTC.