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It has been over three years since the last revision of the CompTIA Security+ exam back on May 1, 2014. In fall of 2017, the latest version, SY0-501, was released. This revamped exam retains the same six domains as established in SY0-401, which emphasizes security in three main areas: application, data, and host.
The process of learning how to subnet IP addresses begins with understanding binary numbers and decimal conversions along with the basic structure of IPv4 addresses. This paper focuses on the mathematics of binary numbering and IP address structure.