Great overview of the CCNA objectives. Use this and a router sim and you are all set for either the 507 or 607 exams. The book is concise and easy to follow rather than Cisco press books that overwhelm you with really obscure details and words. Flipside, if you want a career in Cisco routers than look more into the CCNP exam. CCNA is for people such as admins of Windows boxes or Unix boxes looking to get some working knowledge of Cisco routers and switches.