Cisco dominates the internetworking hardware market with a more than 80% share of the routers used on the Internet. The Cisco Certified Network Associate Data Center (CCNA) certification is Cisco's newest certification, covering the Cisco Data Center suite of products, including the Nexus switches. This book will provide in-depth coverage of all exam objectives for exam 640-911, Introducing Cisco Data Center Networking. It addition, it offers expanded coverage on key topics reflected on the exam. The book will cover: Understanding Basic Networking Ethernet Technologies OSI and DoD model   OSI Network Layer and Introduction to IP Addressing TCP/IP Transport Layer Basic IP Routing Technologies Layer 2 Switching Technologies   Routing Principles Introduction to Nexus  Readers will also have access to additional study tools, including the bonus practice exams, electronic flashcards, a searchable PDF of a Glossary of Terms. In addition, they will be able to use the free network simulator to perform all the hands-on labs.