The Cisco Official Cert Guide: CCNA Routing & Switching ICND2 200-105 by Wendell Odom is a comprehensive textbook designed for adult education and vocational training in the field of networking. Published by Cisco Press in 2016, this official certification guide covers the subject areas of computer networking and hardware, specifically focusing on the CCNA Routing & Switching ICND2 200-105 certification. With 992 pages and illustrations, this hardcover/DVD format book provides in-depth information and guidance for individuals looking to advance their technical skills in networking. Written in English, this textbook is suitable for advanced, intermediate, and technical level learners.