root Archives - Justin Wilson (j2sw)

How does the Domain Name System (DNS) works?

March 12, 2026April 11, 2023 by j2sw

Over the years, I have written articles on Domain Name System (DNS) and how and why you should do certain things. I came across this DNS graphic this morning. Image Credit: @Rapid_API As you can see, a never-before-seen DNS request is sent to a resolver, then a root server, then a TLD server, then an … Read more

DNS in ISP networks and why you should care

March 14, 2026February 6, 2022 by j2sw

If you are not familiar with how DNS works, please go and read this article and watch the accompanying video. In this article we will talk about the different types of DNS servers an ISP will encounter and the design considerations of implementing them into your network. Let’s jump into the three types. Cache servers … Read more