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Guillermo Baltra

Guillermo Baltra is a network researcher dedicated to understanding and improving the Internet's underlying infrastructure. His work combines innovative network measurement techniques to strengthen the security, reliability, and resilience of critical online services.


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Understanding partial reachability in the Internet core

By on 7 Aug 2026

Guest Post: Persistent partial reachability is not noise — it is a fundamental, measurable part of how the Internet behaves today. A small number of long-lived peninsulas cause most of the impact, and recognizing them can dramatically improve both operational clarity and measurement accuracy.


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