Guides & Articles

Practical writing on networking, security, encoding, and the tools developers actually reach for. No fluff, no padding — just explanations that hold up in production.

Networking
Subnetting Without the Headaches: A Practical Guide
CIDR notation, usable host counts, and how to plan an address scheme without binary math.
6 min read
Encoding
Base64 Is Not Encryption — Here's What It Actually Is
A common misunderstanding that leads to real security problems. What Base64 does, where it appears, and how to use it correctly.
5 min read
Developer Tools
Making Sense of JSON: Formatting, Validation, and Common Errors
Why JSON breaks, what the errors actually mean, and how to read deeply nested structures without losing your mind.
5 min read
Security
Building Passwords That Actually Hold Up
Length beats complexity. Entropy beats patterns. A practical look at what makes a password strong and what doesn't.
6 min read
Networking
What Your IP Address Actually Reveals (And What It Doesn't)
Geolocation accuracy, the difference between public and private IPs, and what a VPN really hides.
5 min read
Security
MD5 vs SHA-256: Which Hash to Use and When It Matters
MD5 is broken for security. SHA-1 is not far behind. Here's what modern hashing looks like and why the algorithm choice matters.
6 min read
Developer Tools
Why URL Encoding Trips Up So Many Developers
The characters that break URLs, how percent-encoding works, and the double-encoding trap that is easier to fall into than it looks.
5 min read
Developer Tools
Unix Timestamps: The Hidden Clock Inside Every Codebase
Why every system stores time as a single integer, what epoch time actually means, and the 2038 problem that is still coming.
5 min read
Networking
How to Check If a Domain Is About to Expire (Before It's a Problem)
WHOIS data, what each field means, and how to set up monitoring that prevents losing a domain you care about.
5 min read
Networking
DNS Records Explained: A, CNAME, MX, TXT, NS — What They All Mean
The record types you actually encounter, what they do, and how to diagnose the DNS issues that show up in real projects.
7 min read
Developer Tools
Writing Regex That Doesn't Make You Hate Yourself
The patterns that come up in production, how to debug a regex that isn't matching, and the flags that change everything.
7 min read
Developer Tools
Binary, Hex, and Decimal: A Practical Guide for IT Pros
Why computers think in binary, why humans use hex, and where each base system shows up in real IT work.
6 min read
Security
Decoding JWTs: What's Actually Inside That Token
Header, payload, signature — what each part contains, what the common claims mean, and what you should never put in a JWT.
7 min read
Developer Tools
UUIDs vs Sequential IDs: A Practical Comparison
Auto-increment vs UUID v4 vs the newer v7. The tradeoffs around performance, security, and sortability that actually matter.
6 min read
Developer Tools
Cron Syntax Without the Pain: Scheduling Jobs That Run When You Expect
The five fields, the special characters, and the timezone trap that causes jobs to fire at 3 AM when you set them for 3 PM.
6 min read