CCNA 200-301 Portable Command Guide is filled with valuable, easy-to-access information-and it's portable enough to 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. Throughout, configuration examples give you a better understanding of how these commands are used in simple network designs.

This book has been completely updated to cover topics in the new 200-301 exam. Use this quick reference resource to help you memorize commands and concepts as you work to pass the CCNA certification exam. Coverage includes

· Network Fundamentals: IPv4 addressing, subnetting, VLSM, route summarization, IPv6 addressing, cables/connections, CLI

· LAN Switching Technologies: Switch configuration, VLANs, VLAN trunking protocol, inter-VLAN communication, STP, EtherChannel, CDP, LLDP

· Routing Technologies: Router configuration, static routing, OSPF

· IP Services: DHCP, NAT, NTP

· Security Fundamentals: Layer 2 security, ACL traffic management, device monitoring and hardening

· Wireless Technologies: Configuring and securing a WLAN AP

· Quick, offline access to all CCNA commands for research and solutions

· Logical how-to topic groupings for a one-stop resource

· Great for review before CCNA certification exams

· Compact size makes it easy to carry with you wherever you go

· "Create Your Own Journal" section with blank, lined pages enables you to personalize the book for your needs

This book is part of the Cisco Press Certification Self-Study Product Family, which offers readers a self-paced study routine for Cisco certification exams. Titles in the Cisco Press Certification Self-Study Product Family are part of a recommended learning program from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press.

Scott Empson is an instructor in the Department of Information Systems Technology at the Northern Alberta Institute of Technology in Edmonton, Alberta, Canada, where he has taught for more than 20 years. He teaches technical courses in Cisco routing and switching, along with courses in professional development and leadership. He has a Master of Education degree along with three undergraduate degrees: a Bachelor of Arts, with a major in English; a Bachelor of Education, again with a major in English/language arts; and a Bachelor of Applied Information Systems Technology, with a major in network management. Scott lives in Edmonton, Alberta, with his wife, Trina, and two university-attending-but-still-haven't-moved-out-yet-but-hope-to-move-out-as-soon-aspossible-after-graduation-so-Dad-can-have-the-TV-room-back children, Zachariah and Shaelyn.

Introduction xix

Part I: Network Fundamentals

CHAPTER 1 IPv4 Addressing-How It Works 1

What Are IPv4 Addresses Used For? 1

What Does an IPv4 Address Look Like? 2

Network and Subnetwork Masks 2

Ways to Write a Network or Subnet Mask 3

Network, Node, and Broadcast Addresses 3

Classes of IPv4 Addresses 4

Network vs. Node (Host) Bits 5

RFC (Private) 1918 Addresses 6

Local vs. Remote Addresses 7

Classless Addressing 7

Lessons Learned 9

CHAPTER 2 How to Subnet IPv4 Addresses 11

Subnetting a Class C Network Using Binary 12

Subnetting a Class B Network Using Binary 15

Binary ANDing 17

So Why AND? 19

Shortcuts in Binary ANDing 20

CHAPTER 3 Variable Length Subnet Masking (VLSM) 23

IP Subnet Zero 23

VLSM Example 24

Step 1: Determine How Many H Bits Will Be Needed to Satisfy the Largest Network 25

Step 2: Pick a Subnet for the Largest Network to Use 25

Step 3: Pick the Next Largest Network to Work With 26

Step 4: Pick the Third Largest Network to Work With 28

Step 5: Determine Network Numbers for Serial Links 30

CHAPTER 4 Route Summarization 33

Example for Understanding Route Summarization 33

Step 1: Summarize Winnipeg's Routes 34

Step 2: Summarize Calgary's Routes 35

Step 3: Summarize Edmonton's Routes 35

Step 4: Summarize Vancouver's Routes 36

Route Summarization and Route Flapping 38

Requirements for Route Summarization 38

CHAPTER 5 IPv6 Addressing-How It Works 39

IPv6: A Very Brief Introduction 39

What Does an IPv6 Address Look Like? 40

Reducing the Notation of an IPv6 Address 41

Rule 1: Omit Leading 0s 41

Rule 2: Omit All-0s Hextet 42

Combining Rule 1 and Rule 2 42

Prefix Length Notation 43

IPv6 Address Types 44

Unicast Addresses 45

Multicast Addresses 48

Anycast Addresses 50

CHAPTER 6 Cables and Connections 51

Connecting a Rollover Cable to Your Router or Switch 51

Using a USB Cable to Connect to Your Router or Switch 51

Terminal Settings 52

LAN Connections 53

Serial Cable Types 53

Which Cable to Use? 55

ANSI/TIA Cabling Standards 56

T568A Versus T568B Cables 57

CHAPTER 7 The Command-Line Interface 59

Shortcuts for Entering Commands 59

Using the Tab Key to Complete Commands 60

Console Error Messages 60

Using the Question Mark for Help 60

enable Command 61

exit Command 61

end Command 61

disable Command 61

logout Command 62

Setup Mode 62

Keyboard Help 62

History Commands 63

terminal Commands 64

show Commands 64

Using the Pipe Parameter ( | ) with the show or more Commands 64

Using the no and default Forms of Commands 66

Part II: LAN Switching Technologies

CHAPTER 8 Configuring a Switch 67

Help Commands 68

Command Modes 68

Verifying Commands 68

Resetting Switch Configuration 69

Setting Host Names 69

Setting Passwords 69

Setting IP Addresses and Default Gateways 70

Setting Interface Descriptions 70

The mdix auto Command 70

Setting Duplex Operation 71

Setting Operation Speed 71

Managing the MAC Address Table 72

Configuration Example 72

CHAPTER 9 VLANs 75

Creating Static VLANs 75

Creating Static VLANs Using VLAN Configuration Mode 75

Assigning Ports to VLANs 76

Using the range Command 76

Configuring a Voice VLAN 76

Configuring Voice and Data with Trust 77

Configuring Voice and Data Without Trust 78

Verifying VLAN Information 78

Saving VLAN Configurations 79

Erasing VLAN Configurations 79

Configuration Example: VLANs 80

2960 Switch 80

CHAPTER 10 VLAN Trunking Protocol and Inter-VLAN Communication 83

Dynamic Trunking Protocol (DTP) 83

Setting the VLAN Encapsulation Type 84

VLAN Trunking Protocol (VTP) 84

Verifying VTP 86

Inter-VLAN Communication Using an External Router: Router-on-a-Stick 87

Inter-VLAN Communication on a Multilayer Switch Through a Switch Virtual Interface 88

Removing L2 Switchport Capability of an Interface on an L3 Switch 88

Configuring Inter-VLAN Communication on an L3 Switch 88

Inter-VLAN Communication Tips 88

Configuration Example: Inter-VLAN Communication 89

ISP Router 89

CORP Router 90

L2Switch2 (Catalyst 2960) 92

L3Switch1 (Catalyst 3560/3650/3750) 94

L2Switch1 (Catalyst 2960) 95