CCENT Exam Cram (exam 640-822)

CCENT Exam Cram (exam 640-822)

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Description

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
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Product details

  • Mixed media product | 384 pages
  • 152.4 x 226.06 x 27.94mm | 544.31g
  • Pearson It Certification
  • Upper Saddle River, United States
  • English
  • 3rd ed.
  • 0789737159
  • 9780789737151
  • 1,309,432

Back cover copy

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
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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
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About Michael H. Valentine

Mike 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. His accessible, humorous, and effective teaching style has demystified Cisco for hundreds of students since he began teaching in 2002. Mike has a bachelor of arts degree from the University of British Columbia, and he currently holds the MCSE:Security, CCDA, CCNP, CCVP, CTP, Convergence+ and CEH certifications. In addition to the popular Exam Cram 2: CCNA book, Mike has contributed to and served as technical editor for the Cisco Press titles CCNP ONT Official Exam Certification Guide and CCNA Flashcards and is currently on the courseware development team for the new Cisco UCAD (Unified Communications Architecture and Design) course.



Andrew Whitaker (M.Sc., CISSP, CCVP, CCNP, CCSP, CCNA, CCDA, MCSE, MCTS, CNE, CEI, CEH, ECSA, Security+, A+, Network+, Convergence+, CTP) is the Director of Enterprise InfoSec and Networking for Training Camp, an international training company that helps certify thousands of IT professionals each year through its unique accelerated learning model. His expert teaching for Training Camp has garnered coverage by The Wall Street Journal, The Philadelphia Inquirer, Certification Magazine, and Business Week magazine. In

addition to coauthoring Exam Cram 2: CCNA, Andrew coauthored the Cisco Press title Penetration Testing and Network Defense and has contributed articles on Cisco certification for CertificationZone. Andrew is currently working on authoring and technical editing other book projects.
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