This should be added to the global glossary. Since we don't have it yet, let's at least add some introductory text. Something like:

The following terminology is used in this section:

* Public network, aka external, is a network that provides the access to Internet for all OpenStack nodes.
* Floating IP network is a subnetwork that is a part of public network and that provides the access to Internet for .....
* Private network is a network that manages tenant traffic.
* Administrative network is a network for management traffic, such as PXE booting and communication between Fuel Master node and cluster (compute?) nodes.
* Storage network is a  network manages the traffic between storage nodes, such as ceph, swift, and cinder, and compute nodes.
* Router, as used in this section, means a virtual neutron router.
* NIC stands for network interface card, aka ethernet adapter (do we really need to spell it out? this is a common term)

Would be good to add what network switches does Mirantis recommend to use for these networks (10GbE and so on) if applicable of course. Does a user need to create all of these networks or is there a minimum number of necessary networks and the others are optional?