It must be said that having a network is great and most fulfilling; however, the reasons for using that network must be challenged and understood. No one has a network for the sake of having a network, so we must bring services to our network to give it a purpose, meaning, and reason to exist.

Of course, there are many and varied services that we can add, many of which are covered during the course of this book. To begin with, we will look at the following topics: