Welcome to the exciting world of Cisco certification! If you've picked up this book because you
want to improve yourself and your life with a better, more satisfying and secure job, you've
done the right thing. Whether you're striving to enter the thriving, dynamic IT sector or seek-
ing to enhance your skill set and advance your position within it, being Cisco certified can seri-
ously stack the odds in your favor to help you attain your goals!
Cisco certifications are powerful instruments of success that also markedly improve your
grasp of all things internetworking. As you progress through this book, you'll gain a complete
understanding of networking that reaches far beyond Cisco devices. By the end of your stud-
ies, you'll comprehensively know how disparate network topologies and technologies work
together to form the fully operational networks that are vital to today's very way of life in the
developed world. The knowledge and expertise you'll gain here is essential for and relevant to
every networking job and is why Cisco certifications are in such high demand—even at com-
panies with few Cisco devices!
Although it's now common knowledge that Cisco rules routing and switching, the fact
that it also rocks the voice, data center, and service provider world is also well recognized.
And Cisco certifications reach way beyond the popular but less extensive certifications like
those offered by CompTIA and Microsoft to equip you with indispensable insight into today's
vastly complex networking realm. Essentially, by deciding to become Cisco certified, you're
proudly announcing that you want to become an unrivaled networking expert—a goal that
this book will get you well on your way to achieving. Congratulations in advance on the
beginning of your brilliant future!