Take the 2020 versions of the Cisco Certified Technician (CCT) and Cisco Certified Network Associate (CCNA) exams with complete confidence using the detailed information contained in this highly effective self-study system. Written by a pair of Cisco networking professionals and training experts, CCT®/CCNA® Routing and Switching All-in-One Exam Guide (Exams 100-490 & 200-301) fully explains all subjects covered on both exams and contains practice questions that mirror those on the live test in tone, format, and content. Beyond fully preparing you for the challenging exam, the book also serves as a valuable on-the-job reference.