Trust the best-selling Official Cert Guide series from Cisco Press to help you learn, prepare, and practice for exam success. They are built with the objective of providing assessment, review, and practice to help ensure you are fully prepared for your certification exam. CCENT/CCNA ICND1 100-105 Official Cert Guide presents students with an organized test-preparation routine through the use of proven series elements and techniques. "Do I Know This Already?" quizzes open each chapter and enable readers to decide how much time they need to spend on each section. Exam topic lists make referencing easy. Chapter-ending Exam Preparation Tasks help students drill on key concepts they must know thoroughly. The