I recently ran into this great study guide for RHCSA and RHCE entitled Hands-on Guide to the Red Hat Exams: RHCSA and RHCE Cert Guide and Lab Manual and as I was going through the guide I wanted to write down my notes for each chapter. You can actually get a sneak peek into the guide here. Here are the Chapters from the Guide:

Each chapter has hands on examples and they depend on this setup:

rhc lab layout RHCSA and RHCE Study Guide

Here is the disk lay out of the machines:

rhc part layout RHCSA and RHCE Study Guide

And here is a good diagram on how the networking is setup:

rhc net diagram RHCSA and RHCE Study Guide

All of the above were taken from here.