... 99 Thursday, July 26, 2007 3:10 PM 800 East 96th StreetIndianapolis, Indiana 46240 USA Cisco Press CCENT/CCNA ICND1 Official Exam Certification Guide,Second Edition Wendell Odom,CCIE ... central authority assigned Class A, B, or C networks to companies, governments, school systems, and ISPs based on the size of their IP network (Class A for large networks, Class B for medium networks, ... that you have used the wrong cable before (straight-through or crossover), but the cable worked. Cisco switches have a feature called auto-mdix that notices when the wrong cabling pinouts are...