Attaining the status of a Design Expert is what a lot of people tend to pursue, but not so many meet success in their pursuit of the CCDE. Becoming a Certified Design Expert is not really a matter of how hard you work, but how smart. You don't have all the time in the world to go making "your" mistakes, just so you could learn from them, or walking the well worn-out path and expecting different results.In this book, I have poured out my wealth of experience and expertise in the world of network design, this I have done in an easy to understand, non-textbook practical fashion without encapsulating the real thing in a sea of words. This book is written from the inside - out, for those who would like to pass both CCDE Written and Practical exams, or to gain deeper knowledge in network design.The book contains detailed systematic guide to learning: Many protocols and the technologies which are used in todays Service Provider, Enterprise, Datacenter, and Mobile operator real life network design.There are a lot of people out there who will try to teach Network Design, they do this haphazardly and at the end of the day they mess up the whole thing. This is not to say that there are no good tutors out there, but they are hard to find. And if you are lucky to find one, it is mostly theoretical and hardly any real-life practical stuff.It is all packed in here.The knowledge and insight, which I have carefully laid out in this book, will help you bag the CCDE certification and become the star that you deserve to be. Some of the areas that the book covers include: network design principles and all the best practices, tens of network design case studies, design review questions after each chapter, how real life networks look like and insight into how large companies and corporations design their network, techniques to will improve your strategic design thinking, CCDE Practical Lab design scenario, complementary study resources.Becoming a Design Expert is easy, but you have to work right and most importantly, you have to work smart.