Networking

Diagram showing QUIC packet flow with ACK frames and congestion window feedback loop.

Inside QUIC's Loss Recovery and Congestion Control Machinery in Production Deployures

A deep dive into the loss detection, ACK handling, and congestion control loops inside QUIC, with a focus on how they behave under real production traffic on HTTP/3 and gRPC.

A datacenter fabric diagram showing GPU racks connected via spine-leaf switches.

AI Networking: How GPUs, Fabrics, and Collective Operations Reshaped the Datacenter

AI workloads pushed the network to its limits. This post walks through the protocols, topologies, and failure modes that define modern AI networking — from RoCE and collective operations to fat-tree fabrics and packet-level telemetry.

Layered diagram of an AI inference request flowing from a user app through gateway, inference, GPU, and network layers.

From Prompt to Packet: Tracing an AI Request Through the Modern Inference Stack

We follow a single agent request from the user prompt down through the AI gateway, inference server, GPU/Kubernetes scheduler, and east-west networking — then turn around and look at how observability, security, and FinOps wrap around the whole thing.

Abstract representation of cryptographic noise packets traveling between two peers.

Inside the Noise Protocol Framework: Building Forward-Secure Handshakes from Scratch

A working engineer’s walkthrough of the Noise Protocol Framework, covering patterns, tokens, and a from-scratch implementation of a forward-secure XX handshake in Python.

Abstract network mesh with kernel-level filter hooks highlighted.

Inside eBPF and Cilium: How Kernel-Level Filtering Rewrites Container Networking

How eBPF and Cilium move packet filtering from user-space daemons into the Linux kernel itself — and why that rewrites the rules for Kubernetes networking performance, observability, and security.