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
