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Reverse-Mapping-Overview

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January 15, 2008, at 11:39 AM by 117.97.51.111 -
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January 15, 2008, at 11:38 AM by 117.97.51.111 -
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(:Googlemm:)
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(:Googlemm:)


http://www.zytrax.com/images/dns_arpa.gif
January 15, 2008, at 11:34 AM by 117.97.51.111 -
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January 15, 2008, at 11:31 AM by 117.97.51.111 -
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*A good info regarding the reverse mapping overview can be found at:

%newwin%[[http://www.zytrax.com/books/dns/ch3/#overview|reverse mapping overview]]
[@
The normal domain name structure as a tree starting from the root. We write a normal domain name LEFT to RIGHT but the hierarchical structure is RIGHT to LEFT.


domain name = www.example.com
highest node in tree is = .com
next (lower) = .example
next (lower) = www

An IPv4 address is written as:

192.168.23.17

This IPv4 address defines a host = 17 in a Class C address range (192.168.23.x). In this case the most important part (the highest node) is on the LEFT (192) not the RIGHT. This is a tad awkward and would make it impossible to construct a sensible tree structure that could be searched in a single lifetime.

(:Google1:)
(:Googlemm:)
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