The current RedHat exams cover Versions 6.1/6.2 & 7.0, however this edition does not cover the extra items for version RedHat 7.0. Granted there is not much more to version 7.0 over 6.2, but the additionals such as update agents, some X items, and RedHat Network Daemon, are not in this edition of the book.It will get you prepared to take the exam, however do not use it to become an expert. The book does not cover (for example) some simple & advanced firewalling protocols (tunnelling, icmp, etc) nor go into details about how these work.