Short, clear write-ups on protocols, tools, and concepts — one idea per post.
How peers behind NAT discover each other before a WebRTC call connects.
Why private IPs work on the internet and how routers translate addresses.
A relay that forwards encrypted packets when a direct peer connection isn't possible.
A deep-dive into how IPSec negotiates, wraps, and protects packets at every hop.
How apps push real-time data updates without polling, and best practices for doing it securely.
The lightweight pub/sub protocol behind most IoT communication — architecture and use cases.
Controlling which nodes a pod can and cannot be scheduled onto.
Preventing pods from landing on the wrong nodes — and granting exceptions when needed.
How nodes in a cluster spread information to each other without a central coordinator.
A probabilistic data structure that answers "have we seen this?" using very little memory.
A single hardened entry point that keeps your private infrastructure off the public internet.
Architecture, replication, and consistency models behind scalable distributed storage.
How the two messaging models differ in architecture, and when to reach for each one.
The differences between the main data storage paradigms and how to choose between them.
A data-processing pattern that combines batch and real-time layers to handle large-scale streams.
A decentralised approach to data ownership where domain teams manage their own data as a product.
How Microsoft built native Linux binary support into Windows — without a VM or dual boot.
How Selenium's WebDrivers interact with browsers to automate testing at the protocol level.