@MISC{81addressmappings, author = {}, title = {ADDRESS MAPPINGS Internet Addresses}, year = {1981} }
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Abstract
This memo describes the relationship between address fields used in the Internet Protocol (IP) [1] and several specific networks. An internet address is a 32 bit quantity, with several codings as shown below. The first type (or class a) of address has a 7-bit network number and a 24-bit local address.