4-5 February 2021
UTC timezone
Webinar doors will open at 15:45 UTC. The first session will start promptly at 16:00 UTC.

Measuring DNS Flag Day 2020

4 Feb 2021, 16:15
Standard Presentation Online Workshop OARC 34 Day 1


Geoff Huston (APNIC)


This presentation measures the change in the behaviour of DNS recursive resolvers in response to DNS Flag Day 2020. The presentation then looks in more detail at the use of the EDNS(0) Buffer Size parameter and the considerations that guide the selection of a threshold for DNS truncation that will shift a DNS transaction to use TCP.

Primary authors

Geoff Huston (APNIC) Joao Luis Silva Damas (Bond Internet Systems)

Presentation Materials