According to VMware documentation, vCenter Server setup is an optional step for vSphere deployment. As you will see later in this book, however, vCenter offers a huge amount of features and options for managing the vSphere environment. It also simplifies management and adds flexibility. It's useful for any administrator and/or environment no matter how large or small. It's fair to say that vCenter is an essential component of every professional vSphere deployment and for each more or less critical environment.
vCenter 5.0 deployment consists of the following tasks: