This book is the easiest step-by-step guide for subnetting in IPv4 & IPv6 that you will ever need. It will explain IP's in a very simplistic manner that you will understand and will prepare you to tackle any IP question in any test; whether it's to take the CCNA certification exam; answering an IP question for hiring purposes or when taking an exam at your college or university. This is the most comprehensive book ever written on IP's!