Networking notes for June 2026

Packet trimming is a technique that allows switches to trim packets when they are congested and only send their headers. This allows receivers to detect congestion faster and request retransmissions faster than with regular packet losses. Costin Raiciu explains that Broadcom’s switches do offer native trimming support, and Thor Ultra implements MRC in hardware. A more detailed description appeared in a technical report.

Safari and Firefox adjust the way they interpret the HTML, CSS and JavaScript of some popular web sites like TikTok or Netflix.

The GEANT network migrated.

The RFC-Editor website which publishes the Request For Comments has been updated. It’s now easier to access the RFC documents.

Metanorma has released a set of software tools that make it easier to write contributions to various standardisation bodies.

While fat-tree topologies are very popular in datacenters, Amazon announced that it has started to use random networks in its recent datacenters.

Cryptool is an online platform that provides many resources of interest to self-educate and to teach about cryptology.

This blog aims at encouraging students who read the open Computer Networking: Principles, Protocols and Practice ebook to explore new networking topics. You can follow this blog by subscribing to its RSS feed or by following @cnp3_ebook on mastodon. Feel free to share the posts that you find interesting on your preferred social network.

Written on June 1, 2026