Cisco Systems Networking Academy: Second-Year Companion Guide is a companion and supplement to the third and fourth semesters of Cisco Systems Networking Academy classes. This book will support and reinforce the online training materials for the Cisco Network Academy Program, along with topics pertaining to CCNA certification. The second year course focuses on the practical applications of the topics covered in the first year course. The instructional materials for the Second-Year Companion follows the instructional style and format that Cisco has created for the Cisco Networking Academy Program. Developed with and approved by Cisco, Cisco Systems Networking Academy Program: Second-Year Companion Guide will provide information and presentation unmatchable by any other publisher.