Networking

• Software-Defined Networking: OpenFlow's Match-Action Tables, the P4 Language, and the Programmable Data Plane Vision · 2026-04-15

  How SDN rewired the ossified internet architecture — from OpenFlow's match-action pipeline to P4's protocol-independent packet processing, and the ONOS/ODL control planes that orchestrate programmable forwarding at scale.

• BGP and Internet Routing: The Path-Vector Protocol, AS-Level Topology, Convergence, and the Prefix Hijacking Problem · 2026-04-08

  How BGP glues together 70,000+ autonomous systems into the global internet — the path-vector algorithm, route-flap damping, the convergence time problem, prefix hijacking, and the RPKI/BGPSec defenses that try to fix it.

• QUIC and HTTP/3: The UDP-Based Transport Revolution — 0-RTT, Connection Migration, and Stream Multiplexing Without Head-of-Line Blocking · 2026-03-06

  How QUIC rewrites the transport layer rulebook by moving TCP's reliability into userspace on top of UDP — 0-RTT handshakes, connection migration across IP addresses, and solving head-of-line blocking once and for all.

• Content Delivery Networks: DNS-Based Routing, Anycast, Edge Caching, and the Economics of CDN Peering · 2026-03-04

  How Akamai, Cloudflare, and Fastly keep the web fast — DNS-based request routing, anycast IPs, consistent hashing at the edge, and the business of CDN peering that makes it all economically viable.

• Kernel Bypass Networking: DPDK, io_uring, and the RDMA Revolution · 2025-02-10

  Dive into how modern systems escape the kernel networking stack for microsecond-scale performance: DPDK's poll-mode drivers, io_uring's submission rings, RDMA's one-sided operations, and the trade-offs each approach demands.

• TCP Congestion Control: From Slow Start to BBR · 2023-02-11

  A comprehensive exploration of TCP congestion control algorithms, from classic approaches like Tahoe and Reno to modern innovations like BBR. Learn how these algorithms balance throughput, fairness, and latency across diverse network conditions.

• User-Space Networking: Snabb Switch, FD.io VPP (Vector Packet Processing), AF_XDP, and the Philosophy of Kernel Bypass · 2021-05-14

  A deep exploration of user-space networking — how Snabb, VPP, and AF_XDP achieve line-rate packet processing by bypassing the kernel, and the architectural trade-offs of moving the network data plane into user space.