July 2010
Beginner to intermediate
1344 pages
40h 20m
English
book
Unix® and Linux® System Administration Handbook, Fourth Edition
by Evi Nemeth, Garth Snyder, Trent R. Hein, Ben Whaley
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17. DNS: The Domain Name System
Zillions of hosts are connected to the Internet. How do we keep track of them all when they belong to so many different countries, networks, and administrative groups? Two key pieces of infrastructure hold everything together: the Domain Name System (DNS), which keeps track of who the hosts are, and the Internet routing system, which keeps track of how they are connected.
Although DNS has come to serve several different purposes, its primary job is to map between hostnames and IP addresses. Users and user-level programs like to refer to machines by name, but low-level network software understands only IP addresses ...
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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.
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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.