... PM ii CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition Wendell OdomCopyright© 2008 Cisco Systems, Inc.Published by: Cisco Press800 East 96th StreetIndianapolis, IN ... 2007 3:10 PM xii Improving Performance by Using Switches Instead of Hubs 58 Increasing Available Bandwidth Using Switches 61Doubling Performance by Using Full-Duplex Ethernet 62Ethernet ... StreetIndianapolis, Indiana 46240 USA Cisco Press CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition Wendell Odom,CCIE No. 1624 1828xbook.fm Page i Thursday, July 26, 2007 3:10...