# \[Podcast\] Measuring the impact of locally served root zone

DevFeed: [\[Podcast\] Measuring the impact of locally served root zone](<https://devfeed.tech/articles/podcast-measuring-the-impact-of-locally-served-root-zone-10857.md>)

Original publisher: [Read original article](<https://blog.apnic.net/2026/09/03/podcast-measuring-the-impact-of-locally-served-root-zone/>)

Author: George Michaelson

Published: 2026-09-03T01:05:09Z

Content type: article

Language: en

Sources: [APNIC Blog](<https://devfeed.tech/sources/apnic-blog.md>)

Topics: [DNSSEC](<https://devfeed.tech/topics/dnssec.md>), [Network](<https://devfeed.tech/topics/network.md>), [Security](<https://devfeed.tech/topics/security.md>), [Internet Engineering Task Force (IETF)](<https://devfeed.tech/topics/ietf.md>), [bug](<https://devfeed.tech/topics/bug.md>)

Tags: [bug](<https://devfeed.tech/tags/bug.md>), [dns](<https://devfeed.tech/tags/dns.md>), [dnssec](<https://devfeed.tech/tags/dnssec.md>), [ietf](<https://devfeed.tech/tags/ietf.md>), [measurement](<https://devfeed.tech/tags/measurement.md>), [network](<https://devfeed.tech/tags/network.md>), [podcast](<https://devfeed.tech/tags/podcast.md>), [research](<https://devfeed.tech/tags/research.md>), [security](<https://devfeed.tech/tags/security.md>), [standards](<https://devfeed.tech/tags/standards.md>), [tech-matters](<https://devfeed.tech/tags/tech-matters.md>)

## AI overview

This podcast discusses research into locally served root zones, a DNS resolver model that pre-fetches and stores the root zone. The study examined BIND, Unbound, and Knot Resolver across multiple configurations, including in-band retrieval and HTTPS fetching. It identified an Unbound bug and found that root zone updates can generate substantial network traffic, potentially exceeding traffic from more frequent queries for uncached data.

## Source excerpt

An analysis of the traffic impacts of locally served root zones, by Ilyas Rahimi at UvA.