CS615 System Administration, Week 07, Segment 2 - The Domain Name System, Part II
Channel: cs615asa
Date: 2021-03-18

In this video, we dissect DNS lookups performed on our EC2 instance, then discuss just how a caching resolver performs the lookup before we turn our instance into such a resolver.

Slides for this lecture: https://stevens.netmeister.org/615/07-dns-II.pdf
Course Website: https://stevens.netmeister.org/615/

Outline:
00:00 Introduction
00:26 A simple lookup
05:06 Getting an authoritative response
07:49 Resolving a name top-down
11:28 tcpdump on a caching resolver