CCNA学习指南：英文版 640-801

Table of Contents

Introduction

Assessment Test

Chapter 1 Internetworking

Internetworking Basics

Intemetworking Models

The Layered Approach

Advantages of Reference Models

The OSI Reference Model

The Application Layer

The Presentation Layer

The Session Layer

The Transport Layer

The Network Layer

The Data Link Layer

The Physical Layer

Ethernet Networking

Half- and Full-Duplex Ethernet

Ethernet at the Data Link Layer

Ethernet at the Physical Layer

Ethernet Cabling

Straight-Through Cable

Crossover Cable

Rolled Cable

Wireless Networking

Data Encapsulation

The Cisco Three-Layer Hierarchical Model

The Core Layer

The Distribution Layer

The Access Layer

Summary

Exam Essentials

Written Lab 1

Written Lab 1.1: OSI Questions

Written Lab 1.2: Defining the OSI Layers and Devices

Written Lab 1.3: Identifying Collision and Broadcast Domains

Review Questions

Answers to Review Questions

Answers to Written Lab 1

Answers to Written Lab 1.1

Answer to Written Lab 1.2

Answers to Written Lab 1.3

Chapter 2 Internet Protocols

TCP/IP and the DoD Model

The Process/Application Layer Protocols

The Host-to-Host Layer Protocols

The Internet Layer Protocols

Binary to Decimal and Hexadecimal Conversion

IP Addressing

IP Terminology

The Hierarchical IP Addressing Scheme

Private IP Addresses

Broadcast Addresses

Introduction to Network Address Translation (NAT)

Summary

Exam Essentials

Written Lab 2

Review Questions

Answers to Review Questions

Answers to Written Lab 2

Chapter 3 IP Subnetting and Variable Length Subnet Masks (VLSMs)

Subnetting Basics

IP Subnet-Zero

How to Create Subnets

Subnet Masks

Classless Inter-Domain Routing (CIDR)

Subnetting Class C Addresses

The Binary Method: Subnetting a Class C Address

The Fast Way: Subnetting a Class C Address

Subnetting Class B Addresses

Subnetting Class A Addresses

Variable Length Subnet Masks (VLSMs)

VLSM Design

Implementing VLSM Networks

Summarization

Troubleshooting IP Addressing

Determining IP Address Problems

Summary

Exam Essentials

Written Lab 3

Review Questions

Answers to Review Questions

Answers to Written Lab 3

Chapter 4 Introduction to the Cisco 1OS

The Cisco Router User Interface

Cisco Router lOS

Connecting to a Cisco Router

Bringing Up a Router

Setup Mode

Command-Line Interface

Logging into the Router

Overview of Router Modes

CLI Prompts

Editing and Help Features

Gathering Basic Routing Information

Router and Switch Administrative Functions

Hostnames

Banners

Setting Passwords

Encrypting Your Passwords

Descriptions

Router Interfaces

Bringing Up an Interface

Configuring an IP Address on an Interface

Serial Interface Commands

Viewing, Saving, and Erasing Configurations

Verifying Your Configuration

Summary

Exam Essentials

Written Lab 4

Hands-on Labs

Hands-on Lab 4.1: Logging into a Router

Hands-on Lab 4.2: Using the Help and Editing Features

Hands-on Lab 4.3: Saving a Router Configuration

Hands-on Lab 4.4: Setting Your Passwords

Hands-on Lab 4.5: Setting the Hostname, Descriptions, IP

Address, and Clock Rate

Review Questions

Answers to Review Questions

Answers to Written Lab 4

Chapter 5 IP Routing

Routing Basics

The IP Routing Process

Testing Your IP Routing Understanding

IP Routing in a Larger Network

Configuring IP Routing in Our Network

Static Routing

Default Routing

Dynamic Routing

Routing Protocol Basics

Administrative Distances

Routing Protocols

Distance-Vector Routing Protocols

Routing Loops

Maximum Hop Count

Split Horizon

Route Poisoning

Holddowns

Routing Information Protocol (RIP)

RIP Timers

Configuring RIP Routing

Verifying the RIP Routing Tables

Holding Down RIP Propagations

RIP Version 2 (RIPv2)

Interior Gateway Routing Protocol {IGRP)

IGRP Timers

Configuring IGRP Routing

Verifying the IGRP Routing Tables

Troubleshooting IGRP

Using Both RIP and IGRP

Verifying Your Configurations

The show protocols Command

The show ip protocols Command

The debug ip rip Command

The debug ip igrp Command

Summary

Exam Essentials

Written Lab 5

Hands-on Labs

Hands-on Lab 5.1: Creating Static Routes

Hands-on Lab 5.2: Dynamic Routing with RIP

Hands-on Lab 5.3: Dynamic Routing with IGRP

Review Questions

Answers to Review Questions

Answers to Written Lab 5

Chapter 6 Enhanced IGRP (EIGRP) and Open Shortest Path

First (OSPF)

EIGRP Features and Operation

Protocol-Dependent Modules

Neighbor Discovery

Reliable Transport Protocol (RTP)

Diffusing Update Algorithm (DUAL)

Using EIGRP to Support Large Networks

Multiple AS

VLSM Support and Summarization

Route Discovery and Maintenance

Configuring EIGRP

Lab_A

Lab_B

Lab_C

Configuring Discontiguous Networks

Verifying EIGRP

Open Shortest Path First (OSPF) Basics

OSPF Terminology

SPF Tree Calculation

Configuring OSPF

Enabling OSPF

Configuring OSPF Areas

Verifying OSPF Configuration

The show ip ospf Command

The show ip ospf database Command

The show ip ospf interface Command

The show ip ospf neighbor Command

The show ip protocols Command

OSPF and Loopback Interfaces

Configuring Loopback Interfaces

Verifying Loopbacks and RIDs

Troubleshooting OSPF

Configuring EIGRP and OSPF Summary Routes

Summary

Exam Essentials

Written Lab 6

Hands-On Labs

Hands-on Lab 6.1: Configuring and Verifying EIGRP

Hands-on Lab 6.2: Enabling the OSPF Process

Hands-on Lab 6.3: Configuring OSPF Neighbors

Hands-on Lab 6.4: Verifying OSPF Operation

Review Questions

Answers to Review Questions

Answers to Written Lab 6

Chapter 7 Layer 2 Switching

Before Layer 2 Switching

Switching Services

Limitations of Layer 2 Switching

Bridging vs. LAN Switching

Three Switch Functions at Layer 2

Spanning Tree Protocol (STP)

Spanning Tree Terms

Spanning Tree Operations

Spanning Tree Example

LAN Switch Types

Cut-Through (Real Time)

FragmentFree (Modified Cut-Through)

Store-and-Forward

Configuring the Catalyst 1900 and 2950 Switches

1900 and 2950 Switch Startup

Setting the Passwords

Setting the Hostname

Setting IP Information

Configuring Interface Descriptions

Setting Port Security on a Catalyst Switch

Erasing the Switch Configuration

Summary

Exam Essentials

Written Lab 7

Hands-on Labs

Hands-on Lab 7.1: Switch Basic Administrative Configurations

Hands-on Lab 7.2: Verifying the Switch Configurations

Review Questions

Answers to Review Questions

Answers to Written Lab 7

Chapter 8 Virtual LANs (VLANs)

VLAN Basics

Broadcast Control

Security

Flexibility and Scalability

VLAN Memberships

Static VLANs

Dynamic VLANs

Identifying VLANs

Frame Tagging

VLAN Identification Methods

Inter-Switch Link (ISL) Protocol

VLAN Trunking Protocol (VTP)

VTP Modes of Operation

VTP Pruning

Routing between VLANs

Configuring VLANs

Assigning Switch Ports to VLANs

Configuring Trunk Ports

Configuring Inter-VLAN Routing

Configuring VTP

Troubleshooting VTP

Configuring Switching in Our Sample Internetwork

Summary

Exam Essentials

Written Lab

Review Questions

Answers to Review Questions

Answers to Written Lab 8

Chapter 9 Managing a Cisco Internetwork

The Internal Components of a Cisco Router

The Router Boot Sequence

Managing Configuration Registers

Understanding the Configuration Register Bits

Checking the Current Configuration Register Value

Changing the Configuration Register

Recovering Passwords

Backing Up and Restoring the Cisco lOS

Verifying Flash Memory

Backing Up the Cisco lOS

Restoring or Upgrading the Cisco Router lOS

Backing Up and Restoring the Cisco Configuration

Backing Up the Cisco Router Configuration

Restoring the Cisco Router Configuration

Erasing the Configuration

Using Cisco Discovery Protocol (CDP)

Getting CDP Timers and Holdtime Information

Gathering Neighbor Information

Gathering Interface Traffic Information

Gathering Port and Interface Information

Using Telnet

Telnetting into Multiple Devices Simultaneously

Checking Telnet Connections

Checking Telnet Users

Closing Telnet Sessions

Resolving Hostnames

Building a Host Table

Using DNS to Resolve Names

Checking Network Connectivity

Using the ping Command

Using the traceroute Command

Summary

Exam Essentials

Written Lab 9

Hands-on Labs

Hands-on Lab 9.1: Backing Up Your Router lOS

Hands-on Lab 9.2: Upgrading or Restoring Your Router lOS

Hands-on Lab 9.3: Backing Up the Router Configuration

Hands-on Lab 9.4: Using the Cisco Discovery Protocol (CDP)

Hands-on Lab 9.5: Using Telnet

Hands-on Lab 9.6: Resolving Hostnames

Review Questions

Answers to Review Questions

Answers to Written Lab 9

Chapter 10 Managing Traffic with Access Lists

Introduction to Access Lists

Standard Access Lists

Wildcard Masking

Standard Access List Example

Controlling VTY (Telnet) Access

Extended Access Lists

Extended Access List Example I

Extended Access List Example 2

Named Access Lists

Monitoring Access Lists

Summary

Exam Essentials

Written Lab 10

Hands-on Labs

Hands-on Lab 10.1: Standard IP Access Lists

Hands-on Lab 10.2: Extended IP Access Lists

Review Questions

Answers to Review Questions

Answers to Written Lab 10

Chapter 11 Wide Area Networking Protocols

Introduction to Wide Area Networks

Defining WAN Terms

WAN Connection Types

WAN Support

Cabling the Wide Area Network

Serial Transmission

Data Terminal Equipment and Data Communication

Equipment

Fixed and Modular Interfaces

High-Level Data-Link Control (HDLC) Protocol

Point-to-Point Protocol (PPP)

Link Control Protocol (LCP) Configuration Options

PPP Session Establishment

PPP Authentication Methods

Configuring PPP on Cisco Routers

Configuring PPP Authentication

Verifying PPP Encapsulation

Frame Relay

Introduction to Frame Relay Technology

Frame Relay Implementation and Monitoring

Integrated Services Digital Network (ISDN)

ISDN Connections

ISDN Components

Basic Rate Interface (BRI)

Primary Rate Interface (PRI)

ISDN with Cisco Routers

Dial-on-Demand Routing (DDR)

Configuring DDR

Optional Commands

DDR with Access Lists

Verifying the ISDN Operation

Summary

Exam Essentials

Written Lab 1 1

Hands-on Labs

Hands-on Lab 1 1.1: Configuring PPP Encapsulation and

Authentication

Hands-on Lab 1 1.2: Configuring and Monitoring HDLC

Hands-on Lab 1 1.3: Configuring Frame Relay and Sub-

interfaces

Hands-on Lab 1 1.4: Configuring ISDN and BRI Interfaces

Review Questions

Answers to Review Questions

Answers to Written Lab 1 1

Appendix A Commands in This Study Guide

Glossary