Networking

Visa and Mastercard don’t issue cards and aren’t banks: they’re networks that connect issuers, merchants, and acquirers. We explain the four-party model, authorization, clearing, and settlement with code examples for developers.

Cloudflare redesigned the data structures behind the 1.1.1.1 DNS cache and freed nearly 100 terabytes of memory across its entire fleet. The changes in Rust also improved performance, with higher throughput and lower latency.

A developer built an industrial line-scan camera system to capture continuous panoramic photographs from trains and ferries. The project, presented at EMFcamp 2026, produced images over 56,000 pixels wide from a camera originally designed to inspect conveyor belts.

RFC 10023 standardizes _for-sale, a TXT record that lets you announce directly in DNS that a domain is for sale, without touching the website or email that already work. The standard defines a strict version tag format and key-value pairs so brokers and automated services can detect it unambiguously.

The Court of Justice of the European Union ruled that a VPN is a lawful technical tool and that geoblocking is the responsibility of the rights holder, not the VPN provider. The ruling clears up a legal gray area that had gone unresolved for more than a decade.