CNNP：CIT学习指南(英文版)(642-831)

    作为路由和交换领域真正的无冕之王，Cisco公司设立了一系列认证考试，以保证使用、管理或提供Cisco产品服务的技术人员能够具备相应的技术水平，而其考试目标和内容随其产品不断地发生变化。为覆盖其最新的考试目标，我们采用“原版引进，重新排版印刷”的方式以最快的速度出版Cisco认证考试系列相应科目的辅导丛书来满足读者的需求。本书作为系列中的一本，针对CCNP：642-831考试而推出。书中的内容从故障诊断方法论开始，首先介绍了配置表和拓扑图，OSI参考模型及面向连接和无连接的协议，接着介绍了Cisco内置诊断工具的使用，串行连接和帧中继连接，之后是ISDN和相关协议及Catalyst系列交换机，最后以一个综合全书知识的现实世界的例子作为结尾。全书每一章后均有大量复习题和答案，其篇幅得当内容新颖实用，不仅适用于网络管理人员、网络设计和开发人员，更是CCNP应试人员的必备材料。

    这本针对修订后的CCNP考试：642-831的学习指南为读者提供了：对关键考试内容的深入讲解；有关对Cisco网络进行故障诊断和优化的实用信息；成百道富有挑战性的复习题；选配光碟中有最新的考试复习软件，包括测试引敬、示例仿真题和电子闪存卡。

    Arthur Pfund，CCIE#7249，现任一500强企业的首席工程师。在联网方面有8年多的经验，负责多数据中心环境下网络部分的战略和战术革新。

Introduction
Accessment Test
Chpater 1 Troubleshooting Methodology
The Complexity of Internetworks
The Problem-Solving Model
Step 1:Define the Problem
Step 2:Gather Facts
Step 3:Consider Possibilities
Step 4 and 5:Create and Implement the Action Plan
Step 6:Observe Results
Step 7:Iterate as Needed
Document the Changes
Summary
Exam Essenttals
Key Terms
Review Questions
Answers to Review Questions
Chapter 2 Network Documentation
The Network Baseline
Network Configuration Table
Router Network Configuration Table
Switch Network Configuration Table
Network Topology Diagrams
Components of a Network Topology Diagram
Creating a Network Topology Diagram
Summary
Exam Essentials
Commands Used in This Chapter
Key Terms
Review Questions
Answers to Review Questions
Chapter 3 End-System Documentation and Troubleshooting
End-System Network Configuration Table
Creating an End-System Network Configuration Table
End-System Network Topology Diagram
Creating an End-System Network Topology Diagram
Troubleshooting End-System Problems
Troubleshooting by Layer
End-System Troubleshooting Commands
Summary
Exam Essentials
Commands Used in This Chapter
Key Terms
Review Questions
Answers to Reveiw Questions
Chapter 4 Protocol Attributes
The QSI Reference Model
Global Protocol Classifications
Connection-Oriented Protocols
Connectionless Protocols
Layer 2:Data-Link Layer Protocols and Applications
Ethernet/IEEE 802.3
Token Ring/IEEE 802.5
Token Frame Format
Point-to-Point Protocol(PPP)
Synchronous Data Link Control(SDLC)
Frame Structure
Frame Relay
Frame Structure
Integrated Services Digital Network(SDLC)
Frame Structure
Integrated Services Digital Network (ISDN)
Frame Structure
Layer 3 and 4:IP Routed Protocols
Internet Protocol(IP)
Internet Control Message Protocol(ICMP)
Transmission Control Protocol(TCP)
U ser Datagram Protocol(UDP)
Summary
Exam Essentials
Key Terms
Review Questions
Answers to Review Questions
Chapter 5 Cisco Diagnostic Commands and TCP/IP Connectivity Troubleshooting
Chapter 6 TCP/IP Routing Protocol Troubleshooting
Chapter 7 Troubleshooting Serial Line and Frame Relay Connectivity
Chapter 8 Troubleshooting ISDN
Chapter 9 Troubleshooting Switched Ethernet
Chapter 10 Applying Cisco's Diagnostic Tools
Glossary