** This book is an update to Subnetting Secrets which was first
written in 2006 *
IP subnetting is a subject you need to master if you want to
enjoy a successful career in IT. Unfortunately, it’s also one of
the hardest to learn: you must understand binary math,
hexadecimal, address classes, private addressing, IPv6, and many
Subnetting questions are sure to feature in any IT networking
exam you will take, and... more...