Radia Perlman Fixed the Internet’s Infinite Loop Problem: Lessons in Building Resilient Systems

Radia Perlman’s 1985 Spanning Tree Protocol addressed the problem of network loops, which could otherwise cause packets to circulate indefinitely and crash connected networks, by enabling systems to detect and manage redundant paths automatically. The piece presents this achievement as a broader engineering principle: systems should anticipate common human errors and provide built-in recovery rather than rely on perfect behavior or restrictive rules. It applies that principle to Git workflows, arguing that features such as branch protections, visual previews, conflict-resolution tools, and simple undo options can make version control less error-prone and improve developer confidence, collaboration, and productivity. Framed during International Women’s Month, it also emphasizes Perlman’s lasting influence on internet reliability and advocates recognition of her technical contribution beyond a single commemorative period.

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