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Here are all the CCNA-level Routing and Switching commands you need in one condensed, portable resource. The CCNA Routing and Switching Portable Command Guide, Third Edition, is filled with valuable, easy-to-access information and is portable enough for use whether you’re in the server room or the equipment closet.
The guide summarizes all CCNA certification-level Cisco IOS® Software commands, keywords, command arguments, and associated prompts, providing you with tips and examples of how to apply the commands to real-world scenarios. Configuration examples throughout the book provide you with a better understanding of how these commands are used in simple network designs.
This book has been completely updated to cover topics in the ICND1 100-101, ICND2 200-101, and CCNA 200-120 exams. Use this quick reference resource to help you memorize commands and concepts as you work to pass the CCNA Routing and Switching certification exam.
The book is organized into these parts:
• Part I TCP/IP v4
• Part II Introduction to Cisco Devices
• Part III Configuring a Router
• Part IV Routing
• Part V Switching
• Part VI Layer 3 Redundancy
• Part VII IPv6
• Part VIII Network Administration and Troubleshooting
• Part IX Managing IP Services
• Part X WANs
• Part XI Network Security
Download the sample pages (includes Chapter 3)
Introduction xx
Part I TCP/IP v4
CHAPTER 1 How to Subnet 1
Class A–E Addresses 1
Converting Between Decimal Numbers and Binary 2
Subnetting a Class C Network Using Binary 2
Subnetting a Class B Network Using Binary 5
Binary ANDing 9
So Why AND? 10
Shortcuts in Binary ANDing 11
The Enhanced Bob Maneuver for Subnetting (or How to Subnet Anything in Under a Minute) 12
CHAPTER 2 VLSM 15
IP Subnet Zero 15
VLSM Example 16
Step 1 Determine How Many H Bits Will Be Needed to Satisfy the Largest Network 16
Step 2 Pick a Subnet for the Largest Network to Use 17
Step 3 Pick the Next Largest Network to Work With 18
Step 4 Pick the Third Largest Network to Work With 20
Step 5 Determine Network Numbers for Serial Links 21
CHAPTER 3 Route Summarization 25
Example for Understanding Route Summarization 25
Step 1: Summarize Winnipeg’s Routes 26
Step 2: Summarize Calgary’s Routes 27
Step 3: Summarize Edmonton’s Routes 27
Step 4: Summarize Vancouver’s Routes 28
Route Summarization and Route Flapping 30
Requirements for Route Summarization 30
Part II Introduction to Cisco Devices
CHAPTER 4 Cables and Connections 31
Connecting a Rollover Cable to Your Router or Switch 31
Using a USB Cable to Connect to Your Router or Switch 31
Terminal Settings 32
LAN Connections 33
Serial Cable Types 33
Which Cable to Use? 35
568A Versus 568B Cables 35
CHAPTER 5 The Command Line Interface 37
Shortcuts for Entering Commands 37
Using the † Key to Complete Commands 37
Console Error Messages 38
Using the Question Mark for Help 38
enable Command 39
exit Command 39
disable Command 39
logout Command 39
Setup Mode 39
Keyboard Help 40