CCNP 4 : Network Troubleshooting Companion Guide
暫譯: CCNP 4：網路故障排除夥伴指南

Description:

The only authorized textbook for the Cisco Networking Academy Program

CCNP 4: Network Troubleshooting Companion Guide contains all the information from the online curriculum. With this Companion Guide, you have access to the course information anytime, anywhere, plus the following reference, study, and review tools:

• Chapter Objectives indicate key concepts for focused study.
• Highlighted key terms throughout the chapter where they are used in context. A comprehensive glossary provides key term definitions to serve as a study aid.
• "Check Your Understanding" review questions, presented at the end of each chapter, act as a review and study guide. They reinforce the concepts introduced in the chapter and help test your understanding before you move on to a new chapter.
• The answers to the questions are provided in an appendix.
• Lab activities from the CCNP 4: Network Troubleshooting Lab Companion are referenced throughout the book. Completing these labs gives you hands-on experience so that you can apply theory to practice.

This Cisco authorized textbook is a portable desk reference designed to complement the CCNP 4: Network Troubleshooting course in the Cisco Networking Academy Program. The topics covered include documentation, baselining, troubleshooting tools, troubleshooting methodologies, and per-OSI-layer troubleshooting techniques. Use this Companion Guide to help prepare for the Cisco Internetwork Troubleshooting exam (642-831), which is one of the four required exams to obtain the CCNP certification.

Companion Title:
CCNP 4: Network Troubleshooting Lab Companion
ISBN: 1-58713-142-0

Companion CD-ROM
The CD-ROM contains a test bank with 200 practice exam questions exclusive to Cisco Press covering topics for the CCNP CIT 642-831 exam.The test engine is powered by Boson Software, Inc., a Cisco Learning Partner. www.boson.com

This book is part of the Cisco Networking Academy Program Series from Cisco Press. The products in this series support and complement the Cisco Networking Academy Program.

Table of Contents:

Introduction.

1. Documenting and Baselining the Network.

    Network Baselining.

      Network Baselining Overview.

      Planning for the First Baseline.

      Identifying Devices and Ports of Interest.

      Determining the Duration of the Baseline.

      Using the Baseline Data.

      Identifying Undesired Network Behavior.

      Identifying Thresholds.

      Predicting Long-Term Performance and Capacity Trends.

      Verifying Policies.

    Network Configuration Documentation.

      Network Configuration Documentation Overview.

      Identifying the Components of a Network Configuration Table.

      Identifying the Components of a Topology Diagram.

      Discovering Network Configuration Information.

      Describing the Process of Creating Network Documentation.

      Creating Network Documentation.

    End-System Configuration Documentation.

      Identifying the Components of an End-System Network Configuration Table.

      Identifying the Components of an End-System Topology Diagram.

      Identifying Commands and Applications Used to Discover Information about End-System Configurations.

      Discovering End-System Configuration Information.

      Creating End-System Network Configuration Documentation.

    Summary.

    Key Terms.

    Check Your Understanding.

2. Troubleshooting Methodologies and Tools.

      Using a Layered Architectural Model to Describe Data Flow.

      Encapsulating Data.

      Bits on the Physical Medium.

      Network Devices Utilize Control Information.

      Decapsulation. 

      OSI Model Versus TCP/IP Model.

      Position of Network Devices in Layered Model.

     Troubleshooting Approaches      

      General Troubleshooting Process.

      Bottom-Up.

      Top-Down.

      Divide and Conquer.

      Guidelines for Selecting an Approach.

     Gathering Symptoms.

      Gathering Symptoms for a Network Problem.

      Gathering Symptoms from an End User: Hardware.

      Gathering Symptoms from an End User: Software.

      Questions to Ask an End User.

      Flow Charts for Gathering Network and End-System Symptoms.

     Network Management Tools.

      Network Management System Frameworks.

      Knowledge-Base Tools.

      Performance Measurement and Reporting Tools.

      Event and Fault Management Tools.

      Policy Management Tools.

    Summary.

    Key Terms.

    Check Your Understanding.

3. Troubleshooting at the Physical Layer.

     Characteristics of Physical Layer Failure Problems.

      Critical Characteristics–Connectivity.

      Critical Characteristics–Upper L