Here's the book you need to prepare the latest Cisco Internetwork Troubleshooting Support (CIT) exam, 642-831. This Study Guide provides:* In-depth coverage of key exam topics* Practical information on troubleshooting and optimizing Cisco internetworks* Hundreds of challenging review questions* Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcardsAuthoritative coverage of all exam objectives, including:* Establishing an optimal system baseline* Diagramming and documenting system topology and end system configuration* Verifying connectivity at all layers* Selecting an optimal troubleshooting approach* Planning a network documentation system and baseline monitoring scheme* Using Cisco IOS commands and applications to identify and isolate system problems* Resolving sub-optimal system performance problems* Restoring optimal baseline service* Working with external providers and system users to resolve service provision problems