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January 2026

Articles published in January 2026

44 Total Articles

How Encryption Protects Data

Encryption transforms plaintext into ciphertext using algorithms and keys. Intercepted data is useless without the key. Symmetric and asymmetric types exist.

How DNS Resolution Works

DNS resolution: Browser checks cache, queries recursive resolver like Google DNS, resolver checks cache, then queries root nameservers to find IP addresses.

How APIs Work: Technical Deep Dive

APIs define software communication contracts. REST APIs use endpoints like /users and HTTP methods like GET for read and POST for create operations.

Database Indexing Explained

Database indexes use B-tree structures maintaining sorted pointers to rows. Like book indexes, they enable fast lookups without scanning entire tables.

Container Technology Explained

Containers use Linux namespaces for isolated processes and cgroups for resource limits. Lightweight virtualization with separate filesystems and networks.

First Principles Thinking Explained

Learn first principles thinking—breaking problems down to fundamental truths and reasoning up—with practical examples and when to use it.

Deliberate Practice Explained

Learn what deliberate practice is, how it differs from regular practice, and why it's the key to developing expert-level skills.

Tradeoffs as a Universal Law

Understand why tradeoffs are fundamental to decision making, how to identify and evaluate them, and why 'having it all' is usually impossible.

How Goodhart's Law Breaks Metrics

Explore Goodhart's Law—when a measure becomes a target, it ceases to be a good measure—and how to design metrics that resist gaming.

Feedback Loops Explained

Learn how feedback loops work—reinforcing and balancing—and why they're fundamental to understanding system behavior and change.

Heuristics Explained

Learn what heuristics are, why the mind uses mental shortcuts, when they work well, and when they lead to systematic errors.