Writing about development and technology.
A deep dive into one of the oldest and most dangerous software vulnerabilities. How rewriting the Return Address works, and how modern OS protections like ASLR, DEP/NX, and Stack Canaries attempt to stop it.
Why did Facebook ditch REST API? The charm of picking only what you want with GraphQL, and its fatal flaws (Caching, N+1 Problem).
A comprehensive guide to Database Indexing. Understanding the B-Tree structure, the difference between Clustered and Non-Clustered Indexes, and why Hash Indexes are rarely used for range queries. Includes a dedicated section on 'The Index Usage Anti-Patterns'.
A comprehensive deep dive into client-side storage. From Cookies to IndexedDB and the Cache API. We explore security best practices for JWT storage (XSS vs CSRF), performance implications of synchronous APIs, and how to build offline-first applications using Service Workers.
My Node.js server crashed every midnight with 'Heap Out of Memory'. The culprit? A global variable hoarding data. Through this debugging nightmare, I learned the true difference between Stack and Heap, how V8 Garbage Collection works, and how to prevent memory leaks.
Traffic lights from Server. 200 Success, 400 You failed, 500 I failed.
HTTP is a Postcard. HTTPS is a Sealed Envelope. Why Google forces you to use HTTPS.
Request gets Response. But has amnesia (Stateless), can't remember who you were 1 second ago. So we invented cookies as sticky notes.
Class is there, but style is missing? Debugging Tailwind CSS like a detective.
When you don't want to go yourself, the proxy goes for you. Hide your identity with Forward Proxy, protect your server with Reverse Proxy. Same middleman, different loyalties.
Who is hiding? User (Forward) or Server (Reverse)?
HTTP is stateless. How Cookies and Sessions solve this. Comparing Stateful Auth (Session) vs Stateless Auth (JWT).
Not just for Netflix. Creating a 'Secure Tunnel' in a hacker-infested public network.
Maintain login without session storage. Server just verifies token. The identity of Base64-encoded JSON. Why stateless scales better.
How whole family surfs with one Public IP. The magic of Network Address Translation concealing Private IPs.
Don't manually configure IP at cafes, right? DHCP server auto-finds and leases available IPs. Sign a 2-hour IP lease contract via DORA process.
How 8.8.8.8 works. Recursive vs Iterative queries, Record types (A vs CNAME), TTL caching strategies, and DNS security.
IP addresses change like home addresses. MAC addresses are like DNA or Fingerprints. Burned into hardware.
Reliable TCP vs Fast UDP. 3-Way Handshake, Flow Control, Header Analysis, Nagle's Algorithm, and Python Code examples for Chat Server.
TCP is polite. Before creating a connection, it greets 3 times. SYN, SYN-ACK, ACK. Why?
