IP Subnetting
Lesson 7: IPv4 Subnetting
Subnetting is one of the most important topics on the exams related to the CCENT and CCNA certifications. You need to know how subnetting works and how to “do the math” to figure out issues when subnetting is in use, both in real life and on the exam. Parts III and V of this book cover the details of subnetting concepts, motivation, and math, but you should have a basic understanding of the concepts before covering the topics between here and Part III.
Subnetting defines methods of further subdividing the IPv4 address space into groups that are smaller than a single IP network. IP subnetting defines a flexible ...
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