Cisco Internetwork Troubleshooting is an in-depth and direct extension of the CIT course taught in Cisco-approved training centers worldwide. The CIT course is recommended training for CCNP certification candidates. This book serves as a supplement for those who have taken or will take the course, and as a course replacement for networking professionals who choose not to attend the course. Focusing on upgrading and troubleshooting Cisco routers, it teaches readers to perform fundamental hardware maintenance and troubleshooting on many different Cisco routers. Readers will understand basic recovery/upgrade procedures and hardware troubleshooting common to all Cisco routers. Since a certain level of knowledge is assumed, it is recommended that readers have previously read Cisco Press's Introduction to Cisco Router Configuration, ISBN 1-57870-076-0. There are no books available that can compete with the actual Cisco training courseware provided in this book.