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CCENT Exam Cram (exam 640-822)

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CCENT Exam Cram (exam 640-822)

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Description

  • Copyright 2008
  • Edition: 1st
  • Premium Website
  • ISBN-10: 0-7897-3715-9
  • ISBN-13: 978-0-7897-3715-1

In this book, you learn how to:

  • Develop perfect fluency in subnetting
  • Understand the OSI model and the Cisco three-layer hierarchical model
  • Connect Cisco equipment, make initial configurations, and connect to other devices to build a network
  • Configure Cisco routers and back up and restore your Cisco IOS Software configurations
  • Implement, verify, and troubleshoot a small, switched network
  • Configure and verify a basic WAN serial connection
  • Understand and apply wireless LAN (WLAN) concepts
  • Mitigate network security threats and secure network devices
  • Configure static routes and RIPv2
  • Connect a small office to the Internet

WRITTEN BY CCNA/CCENT Experts!

Michael Valentine has been in the IT field for 12 years, focusing on network design and implementation. He is currently a Cisco trainer with Skyline Advanced Technology Services and specializes in Cisco Unified Communications instruction as well as CCNA and CCNP courses.

Andrew Whitaker is the director of enterprise InfoSec and networking and senior training instructor for Training Camp. He has achieved several Cisco certifications and has written on several Cisco topics.

This book includes a CD-ROM that features:

  • Complete coverage of CCENT exam objectives
  • Realistic exam questions for effective practice
  • Detailed explanations of correct and incorrect answers
  • Multiple exam modes
  • Flash Card format
  • An electronic copy of the book

Sample Content

Online Sample Chapter

CCENT Exam Cram: Concepts in IP Addressing

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Table of Contents

Introduction ...................................................................................1

Self-Assessment..............................................................................9

Chapter 1:

Networking Fundamentals.................................................................17

Introduction ..............................................................................................18

Components and Terms ...........................................................................18

Topologies.................................................................................................18

LAN Technologies....................................................................................19

    Ethernet ...........................................................................................19

WAN Technologies ..................................................................................21

    Dedicated Leased Line Connections..............................................22

    Circuit-Switched Connections........................................................22

    Packet-Switched Connections ........................................................22

    Cell-Switched Connections ............................................................23

Wireless Networks....................................................................................23

Other Network Technologies ..................................................................23

Exam Prep Questions ...............................................................................25

Answers to Exam Prep Questions............................................................27

Chapter 2:

Network Models.............................................................................29

Introduction ..............................................................................................30

Cisco Hierarchical Model ........................................................................30

    Access Layer ....................................................................................31

    Distribution Layer...........................................................................31

    Core Layer.......................................................................................31

    Advantages of the Three-Layer Model ..........................................32

OSI Model ................................................................................................32

    Layer 7: The Application Layer .....................................................33

    Layer 6: The Presentation Layer....................................................34

    Layer 5: The Session Layer ............................................................34

    Layer 4: The Transport Layer ........................................................35

    Layer 3: The Network Layer..........................................................41

    Layer 2: The Data Link Layer .......................................................43

    Layer 1: The Physical Layer...........................................................44

TCP/IP Model ................................................................................46

Exam Prep Questions ...............................................................................48

Answers to Exam Prep Questions............................................................50

Chapter 3:

Concepts in IP Addressing ................................................................53

Introduction ..............................................................................................54

Binary ........................................................................................................54

Hexadecimal..............................................................................................56

    Conversion Between Binary, Hex, and Decimal .....................................57

    Decimal to Hexadecimal Conversions............................................58

Hexadecimal to Decimal Conversions............................................58

IP Address Components...........................................................................59

    Address Class ...................................................................................59

    Default Subnet Mask.......................................................................59

    The Network Field .........................................................................60

    The Host Field................................................................................61

    Non-Default Masks.........................................................................61

    The Subnet Field.............................................................................61

Subnetting.................................................................................................62

Address Class and Default Mask.....................................................62

The Increment.................................................................................63

Number of Hosts.............................................................................66

The Broadcast ID............................................................................67

Number of Subnets .........................................................................69

Working with Subnetting Questions..............................................71

The Subnetting Chart.....................................................................72

Exam Prep Questions ...............................................................................75

Answers to Exam Prep Questions............................................................80

Chapter 4:

Working with Cisco Equipment ...........................................................83

Introduction ..............................................................................................84

Products ....................................................................................................84

External Connections ...............................................................................84

    Console ............................................................................................84

    Aux Port...........................................................................................86

    Ethernet Port...................................................................................86

    Serial Port ........................................................................................87

    Other Connections..........................................................................88

Connecting and Configuring Cisco Devices ...........................................88

    Device Memory Locations..............................................................89

    IOS Startup Process ........................................................................89

    Setup Mode .....................................................................................91

    Configuration Register....................................................................91

    Password Recovery..........................................................................91

    Command Line Modes ...................................................................93

    Command Shortcuts .......................................................................94

Context-Sensitive Help ............................................................................95

    Basic Switch Configuration.............................................................96

    Basic Router Configuration ............................................................97

Securing Routers and Switches ................................................................98

    Configuring SSH Access to Your Router .....................................100

Exam Prep Questions .............................................................................102

Answers to Exam Prep Questions..........................................................104

Chapter 5:

Managing Your Router....................................................................107

Introduction ............................................................................................108

IOS Naming Conventions .....................................................................108

Back Up and Restore IOS ......................................................................110

Backup and Restore Configurations ......................................................111

Troubleshooting and Remote Management..........................................112

    Telnet .............................................................................................112

    Secure Shell (SSH) ........................................................................114

    CDP...............................................................................................115

    ICMP.............................................................................................116

Exam Prep Questions .............................................................................118

Answers to Exam Prep Questions..........................................................120

Chapter 6:

Basic Catalyst Switch Operations and Configuration ...............................123

Introduction ............................................................................................124

Bridging and Switching ..........................................................................124

    Functions of Bridges and Switches ...............................................124

    The Differences Between Switches and Bridges..........................128

    Switching Modes ...........................................................................130

    STP................................................................................................133

Exam Prep Questions .............................................................................135

Answers to Exam Prep Questions..........................................................137

Chapter 7:

Introduction to Wide-Area Networks ...................................................139

Introduction ............................................................................................140

Encapsulation Types ...............................................................................140

Cisco HDLC ..........................................................................................141

PPP..........................................................................................................142

    Components ..................................................................................142

    Configuration ................................................................................144

    Verification and Troubleshooting .................................................146

Frame Relay ............................................................................................146

    Concepts and Terminology...........................................................146

    The Split Horizon Problem..........................................................150

    Configuration ................................................................................151

    Verification and Troubleshooting .................................................154

Network Address Translation.................................................................155

    NAT Terminology.........................................................................156

    Applications, Advantages, and Disadvantages of NAT................157

    Static NAT.....................................................................................159

    Dynamic NAT...............................................................................161

    PAT ................................................................................................162

Exam Prep Questions .............................................................................166

Answers to Exam Prep Questions..........................................................167

Chapter 8:

Wireless LANs .............................................................................169

Introduction ............................................................................................170

WLAN Standards...................................................................................170

    Unlicensed Radio Bands ...............................................................170

    802.11.............................................................................................171

    802.11a...........................................................................................172

    802.11b...........................................................................................173

    802.11g...........................................................................................174

    802.11n ..........................................................................................174

WLAN Operational Modes ...................................................................175

    Ad Hoc Mode................................................................................175

    Infrastructure Mode ......................................................................175

Basic Service Set and Extended Service Set ..........................................176

    BSS.................................................................................................176

    ESS.................................................................................................176

WLAN Security......................................................................................177

    WLAN Security Threats ..............................................................177

    WLAN Security Methods.............................................................178

    WLAN Security Standards ...........................................................179

Basic WLAN Configuration Steps ........................................................181

Exam Prep Questions .............................................................................183

Answers to Exam Prep Questions..........................................................185

Chapter 9:

Basic Network Security...................................................................187

Introduction ............................................................................................188

The Need for Security ...........................................................................188

Mitigation Steps......................................................................................189

    Reconnaissance Attacks .................................................................190

    Access Attacks................................................................................191

    Denial of Service Attacks ..............................................................192

Common Security Appliances................................................................193

Best Practices ..........................................................................................195

Exam Prep Questions .............................................................................196

Answers to Exam Prep Questions..........................................................198

Chapter 10:

Basic Routing ..............................................................................201

Introduction ............................................................................................202

    Static Routes..................................................................................202

    Default Routes...............................................................................203

    Dynamic Routes ............................................................................204

RIP ..........................................................................................................211

    Characteristics of RIP ...................................................................211

    Implementing RIP.........................................................................212

    Verifying and Troubleshooting RIP .............................................214

Exam Prep Questions .............................................................................218

Answers to Exam Prep Questions..........................................................223

Chapter 11:

Small-Office Internet Connection .......................................................225

Introduction ............................................................................................226

Basic Configuration Using the Cisco Router and Security Device

Manager (SDM) ...................................................................................226

    Setting Hostname, Domain, and Login Credentials ...................230

    Configuring IP Addressing Using SDM Express ........................230

    Configuring the DHCP Server Using SDM Express..................232

    Setting Up the Wan Interface in SDM Express ..........................233

    Configuring NAT Using SDM Express.......................................234

    Firewall Option .............................................................................235

    Security Configuration Checklist .................................................236

    SDM Express Configuration Summary........................................237

    Configuring a Default Route in SDM..........................................242

    Testing Connectivity Using the SDM Interface ..........................243

Basic Switch Configuration Using the CLI ..........................................246

    Securing the Switch.......................................................................246

    Configuring a Management IP and Default Gateway .................247

Exam Prep Questions .............................................................................250

Answers to Exam Prep Questions..........................................................252

Practice Exam #1..........................................................................255

Practice Exam #1 Answer Key...........................................................275

Practice Exam #2..........................................................................289

Practice Exam #2 Answer Key...........................................................307

Appendix A:

What’s on the CD-ROM ...................................................................319

Appendix B:

Need to Know More? .....................................................................323

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

Index

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Introduction

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