AllInOne CCNA 20 Certification Exam Guide Author:Robert E. Larson All-in-One is all you need! This authoritative reference offers complete coverage of all material on the Cisco(r) Certified Network Associate exam (640-507). You'll find exam objectives at the beginning of each chapter, helpful exam tips, end-of-chapter practice questions, and photographs and illustrations. The bonus CD-ROM contains practice tes... more »ts, hundreds of questions, and LearnKey(tm) video clips. This comprehensive guide not only helps you pass the CCNA certification exams, but will also serve as an invaluable on-the-job reference.« less