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OSI and TCP/IP Models — What Every Developer & Sysadmin Should Know
Practical comparison of the 7-layer OSI model and 4-layer TCP/IP model, packet encapsulation, and bottom-up network debugging techniques.
Reverse Proxy Basics — One Front Door for All Web Services
Complete beginner guide to reverse proxies, forward vs reverse proxies, SNI routing, upstream headers (X-Forwarded-For), TLS termination, and choosing between Caddy and Nginx.
Choosing a TLD — .de vs .eu vs .com vs New gTLDs
Complete beginner guide to selecting the right Top-Level Domain, pricing traps, renewal math, HSTS preloading, trust signals, and SEO implications.
Choosing MySQL vs MariaDB in 2026
A practical comparison of MySQL and MariaDB, historical divergence, architectural differences, authentication plugins, and choosing the right database for your project.
Git Crash Course — Clone, Branch, Commit, and PR
A complete beginner-friendly Git workflow covering essential commands, flags, branch management, and contributing to open-source repositories.