September 2003
Intermediate to advanced
432 pages
8h 53m
English
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DNS Fundamentals
DNS works in a hierarchical fashion with the root at the top. Queries cascade down through the branches until a server is found that can provide a resolution. The collection of machines that use DNS is called the namespace. The namespace is made up of a number of domains, each consisting of a number of machines that contain information about hosts, or of other servers that might contain the required information. The domains are organized in a similar way to a Unix file system, which is an inverted tree, with a root at the top and numerous branches extending from the root.
Top-Level Domains
If you are connected to the Internet, then the root domain is the highest level of domain, identified by a . (dot). It is often called the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.