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Linux Administration: A Beginner’s Guide (Sixth Edition) by Wale Soyinka

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CHAPTER 16
DNS
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The ability to map an unfriendly numerical IP address into a people-friendly format has been of paramount importance since the inception of the Internet in the 1970s. Although this translation isn’t mandatory, it does make the network much more useful and easy to work with for humans.
Initially, IP address–to–name mapping was done through the maintenance of a hosts.txt file that was distributed via FTP to all the machines on the ...

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