(Black/White) This book explains both IPv4 & IPv6. It is a manual for subnetting in these two protocols. This book is a step-by-step guide for those that need to find a faster and simple way of subnetting and will cover everything you need to know about these two Internet Protocols. You will learn to subnett in your head, no calculator needed It will also let you subnet in IPv6 using my same, simple and easy method.