Routers and Routing Basics CCNA 2 Companion Guide (路由器與路由基礎 CCNA 2 伴隨指南)

Description

The completely revised and only authorized textbook for the Cisco Networking Academy Program CCNA 2 curriculum

• A portable reference that supports the topics in the Cisco Networking Academy CCNA 2 curriculum aligning 1:1 with course modules
• Features improved readability, enhanced topic explanations, real-world examples, and all-new graphical presentations
• Written by leading CCNA author Wendell Odom and Academy instructor Rick McDonald, who bring a fresh voice to the course material

Routers and Routing Basics CCNA 2 Companion Guide is the official supplemental textbook for the CCNA 2 course of the Cisco Networking Academy Program. Completely revised from the previous edition with new examples and explanations, this textbook includes original material developed by the authors, yet it fully aligns with the CCNA 2 curriculum. Written by experienced authors who present material in a comprehensive manner--using their own voices and their own examples--this new edition augments student understanding of course material. The new edition incorporates improved features to aid instructors and enhance student comprehension. For example, chapters align with course modules in both name and number, and chapter objectives are stated as questions to encourage students to think about and find answers as they read chapters. End of- chapter questions and summaries align with chapter objectives to emphasize key topics, while key terms are listed in each chapter opener in the order of occurrence to alert students to upcoming vocabulary words. In addition, new features include "How To" quick references for step-by-step tasks; real-world examples and all-new illustrations; concise explanations with a focus on word usage and sentence structure for improved readability; and correlations to the CCNA exam in Chapter Objectives, Check Your Understanding questions, and new Challenge Activities.

 

 

Table of Contents

Contents

Introduction  

Chapter 1  WANs and Routers  

Objectives

Key Terms 

Introduction to Routing Over WANs 

Connecting Routers to WAN Links  

Creating Inexpensive Leased Lines in a Lab   

Overview of Routing Over WANs  

Router Hardware and Software Components  

Router Components and Cabling  

Internal Router Components  

External Router Interfaces  

Router Management Ports  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 2  Introduction to Routers  

Objectives  

Key Terms  

Operating the Cisco IOS CLI   

The Cisco IOS CLI  

Router EXEC Modes  

Router Configuration Modes  

Cisco IOS Fundamentals  

Starting, Configuring, Accessing, and Using a Router  

Initial Booting of a Router  

Creating an Initial Configuration Using Setup Mode  

Accessing a Router  

Using a Router CLI  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 3  Configuring a Router  

Objectives  

Key Terms  

Configuring a Router for Basic Routing  

Reviewing the Configuration Modes  

Configuring Ethernet and Serial Interfaces   

Configuring Hostnames and Passwords  

Examining Operational Status Using show Commands  

Changing the Configuration  

Documenting the Router Configuration  

Configuring Interface Descriptions  

Configuring Login Banners  

Configuring Local Host Tables  

Backing Up the Configuration  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 4  Learning About Other Devices  

Objectives  

Key Terms  

Discovering Neighbors Using CDP  

CDP Protocol Operations  

Information Learned by CDP  

Configuring and Verifying CDP Operations  

Creating a Network Map Using CDP Information  

Additional CDP Verification and Troubleshooting Commands  

Getting Information and Troubleshooting Remote Devices  

Verifying Which Networking Layers Are Working  

Telnet Basics  

Advanced Telnet: Suspending and Switching Between Telnet Connections  

Cisco IOS ping and traceroute Commands  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 5  Managing Cisco IOS Software  

Objectives  

Key Terms  

Router Boot Sequence and Loading Cisco IOS Images  

Choosing the Cisco IOS Image During the Router Boot Sequence  

Troubleshooting and Verifying the Choice of Cisco IOS  

Managing Cisco Router IOS and Configuration Files  

Cisco IOS File System  

Cisco IOS Filenames  

Copying and Managing Cisco IOS Images  

Copying and Managing Cisco IOS Configuration Files  

Recovering from Lost Passwords  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 6  Routing and Routing Protocols  

Objectives  

Key Terms  

Introduction to Static and Connected IP Routes  

Learning Connected Routes  

Static Routes  

Dynamic Routing Overview  

Terminology Related to Routing Protocols  

Routing Protocol Functions  

Interior and Exterior Routing Protocols  

How Routing Protocols Work: Routing Protocol Algorithms  

Routing Protocols Overview  

A Brief Review of IP Routing  

Routing Protocol Features: RIP, OSPF, EIGRP, and BGP   

RIP Configuration  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 7  Distance Vector Routing Protocols  

Objectives  

Additional Topics of Interest  

Key Terms  

Avoiding Loops When Converging Using Distance Vector Routing Protocols  

Review of Distance Vector Operation in a Stable Network   

Route Poisoning  

Problem: Counting to Infinity  

Loop-Prevention Features  

Summarizing Loop Avoidance   

Routing Information Protocol  

Configuring RIP Versions 1 and 2  

Other RIP Configuration Options  

RIP Verification and Troubleshooting  

Choosing the Best Route Among the Possible Routes  

Integrating Static Routes with RIP  

Classful and Classless Routing Protocols, Routing, and Addressing  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 8  TCP/IP Suite Error and Control Messages  

Objectives  

Additional Topics of Interest  

Key Terms  

ICMP Echo Messages and the ping Command  

ICMP Unreachable: Notifying Hosts When the Packet Cannot Be Delivered  

A Review of IP Routing  

Type Codes for ICMP Unreachable Messages  

ICMP Unreachable Message Formats and Codes  

ICMP Unreachable Messages When a Router Cannot Fragment a Packet

ICMP TTL Exceeded and Long Routes  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 9  Basic Router Troubleshooting  

Objectives  

Key Terms  

Examining the Routing Table  

IP Routing (Forwarding)  

Filling the IP Routing Table with Routes  

Network Testing Methods and Tips   

Troubleshooting Methods  

Troubleshooting Tips  

Router and Routing Troubleshooting Tips  

Troubleshooting Using the show interfaces Command  

Troubleshooting Layer 1 Using the show controllers Command  

Troubleshooting Using the show cdp Command  

Troubleshooting Using the traceroute Command  

Troubleshooting Using the show ip route and show ip protocols Commands   

Troubleshooting Using the debug Command  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 10  Intermediate TCP/IP  

Objectives  

Key Terms  

TCP and UDP Operation  

Flow Control and Windowing  

Establishing and Terminating TCP Connections  

Denial-of-Service Attacks and SYN Floods  

TCP Error Recovery (Reliability)  

Segmentation, Reassembly, and In-Order Delivery  

Comparing TCP and UDP   

Operation of Transport Layer Ports  

Connecting to Servers: Well-Known Ports  

Comparing Well-Known, Dynamic, and Registered Ports  

Comparing MAC Addresses, IP Addresses, and Port Numbers  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Chapter 11  Access Control Lists  

Objectives  

Additional Topics of Interest  

Key Terms  

Access Control List Fundamentals  

ACL Concepts  

ACL Configuration Basics  

Configuration Considerations  

Matching a Range of IP Addresses Using a Wildcard Mask  

Verifying ACLs  

Access Control List Configuration  

Configuring Numbered Standard ACLs  

Configuring Numbered Extended ACLs  

Named IP ACLs  

Locating ACLs  

Summary  

Check Your Understanding  

Challenge Questions and Activities  

 

Appendix A  

Appendix B  

Glossary  

Index