CCNP ONT Official Exam Certification Guide
Published on 31. May 2007
Book
Mixed media product
408 pages
978-1-58720-176-9 (ISBN)
Description
Master all 642-845 exam topics with the official study guide
Assess your knowledge with chapter-opening quizzes
Review key concepts with foundation summaries
Practice with hundreds of exam questions on the CD-ROM
Amir Ranjbar, CCIE (R) No. 8669
CCNP ONT Official Exam Certification Guide is a best of breed Cisco (R) exam study guide that focuses specifically on the objectives for the Optimizing Converged Cisco Networks exam (642-845 ONT). Successfully passing the ONT 642-845 exam certifies that you have the knowledge and skills necessary to optimize and apply effective QoS techniques for converged networks.
CCNP ONT Official Exam Certification Guide follows a logical organization of the CCNP (R) ONT exam objectives. Material is presented in a concise manner, focusing on increasing your retention and recall of exam topics. You can organize your exam preparation through the use of the consistent features in these chapters. "Do I Know This Already?" quizzes open each chapter and allow you to decide how much time you need to spend on each section. Exam topic lists and concise Foundation Summary information make referencing easy and give you a quick refresher whenever you need it. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts.
The companion CD-ROM contains a powerful testing engine that allows you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback on a topic-by-topic basis, presenting question-by-question remediation to the text. Well regarded for its level of detail, assessment features, and challenging review questions and exercises, this book helps you master the concepts and techniques that can enable you to succeed on the exam the first time.
Amir Ranjbar, CCIE (R) No. 8669, is a certified Cisco instructor and an internetworking consultant. He conducts Cisco official courses such as BCMSN, BSCI, ONT, CVOICE, BGP, and MPLS for Global Knowledge, the largest Cisco training partner. Amir has a bachelor's degree in computing and information science and a master's degree in knowledge-based systems from the University of Guelph in Ontario, Canada.
The official study guide helps you master all the topics on the CCNP ONT exam, including
Implementing a voice-over-IP (VoIP) network
Implementing QoS on converged networks
Specific IP QoS mechanisms for implementing the DiffServ QoS model
AutoQoS
Wireless security
Basic wireless management
Companion CD-ROM
The CD-ROM contains an electronic copy of the book and more than 200 practice questions for the ONT exam, which are all available in study mode, test mode, and flash card format.
This volume is part of the Exam Certification Guide Series from Cisco Press (R). Books in this series provide officially developed exam preparation materials that offer assessment, review, and practice to help Cisco Career Certification candidates identify weaknesses, concentrate their study efforts, and enhance their confidence as exam day nears.
Category: Cisco Certification
Covers: ONT Exam 642-845
Assess your knowledge with chapter-opening quizzes
Review key concepts with foundation summaries
Practice with hundreds of exam questions on the CD-ROM
Amir Ranjbar, CCIE (R) No. 8669
CCNP ONT Official Exam Certification Guide is a best of breed Cisco (R) exam study guide that focuses specifically on the objectives for the Optimizing Converged Cisco Networks exam (642-845 ONT). Successfully passing the ONT 642-845 exam certifies that you have the knowledge and skills necessary to optimize and apply effective QoS techniques for converged networks.
CCNP ONT Official Exam Certification Guide follows a logical organization of the CCNP (R) ONT exam objectives. Material is presented in a concise manner, focusing on increasing your retention and recall of exam topics. You can organize your exam preparation through the use of the consistent features in these chapters. "Do I Know This Already?" quizzes open each chapter and allow you to decide how much time you need to spend on each section. Exam topic lists and concise Foundation Summary information make referencing easy and give you a quick refresher whenever you need it. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts.
The companion CD-ROM contains a powerful testing engine that allows you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback on a topic-by-topic basis, presenting question-by-question remediation to the text. Well regarded for its level of detail, assessment features, and challenging review questions and exercises, this book helps you master the concepts and techniques that can enable you to succeed on the exam the first time.
Amir Ranjbar, CCIE (R) No. 8669, is a certified Cisco instructor and an internetworking consultant. He conducts Cisco official courses such as BCMSN, BSCI, ONT, CVOICE, BGP, and MPLS for Global Knowledge, the largest Cisco training partner. Amir has a bachelor's degree in computing and information science and a master's degree in knowledge-based systems from the University of Guelph in Ontario, Canada.
The official study guide helps you master all the topics on the CCNP ONT exam, including
Implementing a voice-over-IP (VoIP) network
Implementing QoS on converged networks
Specific IP QoS mechanisms for implementing the DiffServ QoS model
AutoQoS
Wireless security
Basic wireless management
Companion CD-ROM
The CD-ROM contains an electronic copy of the book and more than 200 practice questions for the ONT exam, which are all available in study mode, test mode, and flash card format.
This volume is part of the Exam Certification Guide Series from Cisco Press (R). Books in this series provide officially developed exam preparation materials that offer assessment, review, and practice to help Cisco Career Certification candidates identify weaknesses, concentrate their study efforts, and enhance their confidence as exam day nears.
Category: Cisco Certification
Covers: ONT Exam 642-845
More details
Language
English
Place of publication
Indianapolis
United States
Publishing group
Pearson Education (US)
Target group
College/higher education
Dimensions
Height: 234 mm
Width: 194 mm
Thickness: 34 mm
Weight
862 gr
ISBN-13
978-1-58720-176-9 (9781587201769)
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.
Schweitzer Classification
Other editions
Previous edition
Book
12/2003
2nd Edition
Cisco Press
€68.48
Article exhausted; check for reprint
Person
Amir S. Ranjbar
, CCIE No. 8669, is an internetworking trainer and consultant. Born in Tehran,
Iran, he moved to Canada in 1983. He received his bachelor's degree in computer science (1989)
and master of science degree in knowledge-based systems (1991) from the University of Guelph
in Guelph, Ontario, Canada. After graduation, Amir worked as a programmer/analyst for Statistics
Canada until 1995 when he was hired by Digital Equipment Corporation as a certified Microsoft
trainer. After performing training on Microsoft Backoffice products such as Windows NT,
Exchange Server, and Systems Management Server for three years, he shifted his focus to Cisco
Systems. In 1998, he joined GEOTRAIN Corporation, which was later acquired by Global
Knowledge Network, and worked for them as a full-time Certified Cisco Systems Instructor until
2005. In October 2005, Amir started his own business (AMIRACAN Inc.) in the field of
internetwork consulting, but his major activity is still conducting training for Global Knowledge
Network on a contractual basis. His areas of specialty are MPLS, BGP, QoS, VoIP, and advanced
routing and switching.
, CCIE No. 8669, is an internetworking trainer and consultant. Born in Tehran,
Iran, he moved to Canada in 1983. He received his bachelor's degree in computer science (1989)
and master of science degree in knowledge-based systems (1991) from the University of Guelph
in Guelph, Ontario, Canada. After graduation, Amir worked as a programmer/analyst for Statistics
Canada until 1995 when he was hired by Digital Equipment Corporation as a certified Microsoft
trainer. After performing training on Microsoft Backoffice products such as Windows NT,
Exchange Server, and Systems Management Server for three years, he shifted his focus to Cisco
Systems. In 1998, he joined GEOTRAIN Corporation, which was later acquired by Global
Knowledge Network, and worked for them as a full-time Certified Cisco Systems Instructor until
2005. In October 2005, Amir started his own business (AMIRACAN Inc.) in the field of
internetwork consulting, but his major activity is still conducting training for Global Knowledge
Network on a contractual basis. His areas of specialty are MPLS, BGP, QoS, VoIP, and advanced
routing and switching.
Content
Part I Voice over IP 3
Chapter 1 Cisco VoIP Implementations 5
"Do I Know This Already?" Quiz 5
Foundation Topics 10
Introduction to VoIP Networks 10
Benefits of Packet Telephony Networks 10
Packet Telephony Components 11
Analog Interfaces 13
Digital Interfaces 14
Stages of a Phone Call 15
Distributed Versus Centralized Call Control 16
Digitizing and Packetizing Voice 19
Basic Voice Encoding: Converting Analog to Digital 19
Basic Voice Encoding: Converting Digital to Analog 20
The Nyquist Theorem 21
Quantization 22
Compression Bandwidth Requirements and Their Comparative Qualities 24
Digital Signal Processors 25
Encapsulating Voice Packets 27
End-to-End Delivery of Voice 27
Protocols Used in Voice Encapsulation 30
Reducing Header Overhead 32
Bandwidth Calculation 34
Impact of Voice Samples and Packet Size on Bandwidth 34
Data Link Overhead 37
Security and Tunneling Overhead 37
Calculating the Total Bandwidth for a VoIP Call 39
Effects of VAD on Bandwidth 41
Implementing VoIP Support in an Enterprise Network 42
Enterprise Voice Implementations 42
Voice Gateway Functions on a Cisco Router 44
Cisco Unified CallManager Functions 45
Enterprise IP Telephony Deployment Models 46
Single-Site Model 46
Multisite with Centralized Call Processing Model 46
Multisite with Distributed Call Processing Model 47
Clustering over WAN Model 48
Identifying Voice Commands in IOS Configurations 48
Call Admission Control (CAC) 49
Part II Quality of Service 55
Chapter 2 IP Quality of Service 57
"Do I Know This Already?" Quiz 57
Foundation Topics 62
Introduction to QoS 62
Converged Network Issues Related to QoS 62
Available Bandwidth 63
End-to-End Delay 64
Delay Variation 65
Packet Loss 66
Definition of QoS and the Three Steps to Implementing It 68
Implementing QoS 69
Identifying and Comparing QoS Models 72
Best-Effort Model 72
Integrated Services Model 73
Differentiated Services Model 74
QoS Implementation Methods 76
Legacy Command-Line Interface (CLI) 76
Modular QoS Command-Line Interface (MQC) 76
AutoQoS 79
Router and Security Device Manager (SDM) QoS Wizard 81
Foundation Summary 89
Q&A 91
Chapter 3 Classification, Marking, and NBAR 93
"Do I Know This Already?" Quiz 93
Foundation Topics 97
Classification and Marking 97
Layer 2 QoS: CoS on 802.1Q/P Ethernet Frame 98
Layer 2 QoS: DE and CLP on Frame Relay and ATM (Cells) 99
Layer 2 1/2 QoS: MPLS EXP Field 100
The DiffServ Model, Differentiated Services Code Point (DSCP), and Per-Hop Behavior
(PHB) 100
IP Precedence and DSCP 102
QoS Service Class 106
Trust Boundaries 108
Network Based Application Recognition (NBAR) 110
Cisco IOS Commands to Configure NBAR 112
Foundation Summary 118
Q&A 119
Chapter 4 Congestion Management and Queuing 123
"Do I Know This Already?" Quiz 123
Foundation Topics 127
Introduction to Congestion Management and Queuing 127
First-In-First-Out, Priority Queuing, Round-Robin, and Weighted Round-Robin Queuing 130
Weighted Fair Queuing 132
WFQ Classification and Scheduling 133
WFQ Insertion and Drop Policy 135
Benefits and Drawbacks of WFQ 135
Configuring and Monitoring WFQ 135
Class-Based Weighted Fair Queuing 138
Classification, Scheduling, and Bandwidth Guarantee 139
Benefits and Drawbacks of CBWFQ 140
Configuring and Monitoring CBWFQ 141
Low-Latency Queuing 142
Benefits of LLQ 144
Configuring and Monitoring LLQ 144
Foundation Summary 146
Q&A 147
Chapter 5 Congestion Avoidance, Policing, Shaping, and Link
Efficiency Mechanisms 149
"Do I Know This Already?" Quiz 149
Foundation Topics 153
Congestion Avoidance 153
Tail Drop and Its Limitations 153
Random Early Detection 154
Weighted Random Early Detection 156
Class-Based Weighted Random Early Detection 158
Configuring CBWRED 158
Traffic Shaping and Policing 163
Measuring Traffic Rates 165
Cisco IOS Policing and Shaping Mechanisms 167
Link Efficiency Mechanisms 167
Layer 2 Payload Compression 168
Header Compression 169
Link Fragmentation and Interleaving 171
Applying Link Efficiency Mechanisms 171
Foundation Summary 172
Q&A 175
Chapter 6 Implementing QoS Pre-Classify and Deploying End-to-End QoS 177
"Do I Know This Already?" Quiz 177
Foundation Topics 180
Implementing QoS Pre-Classify 180
Virtual Private Networks (VPN) 180
QoS Pre-Classify Applications 181
QoS Pre-Classification Deployment Options 183
Deploying End-to-End QoS 185
QoS Service Level Agreements (SLAs) 186
Enterprise Campus QoS Implementations 188
WAN Edge QoS Implementations 190
Control Plane Policing (CoPP) 192
Foundation Summary 194
Q&A 198
Chapter 7 Implementing AutoQoS 201
"Do I Know This Already?" Quiz 201
Foundation Topics 205
Introducing AutoQoS 205
Implementing and Verifying AutoQoS 207
Two-Step Deployment of AutoQoS Enterprise on Routers 209
Deploying AutoQoS VoIP on IOS-Based Catalyst Switches 210
Verifying AutoQoS on Cisco Routers and IOS-Based Catalyst Switches 212
AutoQoS Shortcomings and Remedies 215
Automation with Cisco AutoQoS 215
Common AutoQoS Problems 218
Interpreting and Modifying AutoQoS Configurations 219
Foundation Summary 222
Q&A 227
Part III Wireless LAN 229
Chapter 8 Wireless LAN QoS Implementation 231
"Do I Know This Already?" Quiz 231
Foundation Topics 235
The Need for Wireless LAN QoS 235
WLAN QoS Description 237
Split MAC Architecture and Light Weight Access Point 238
Current Wireless LAN QoS Implementation 239
Configuring Wireless LAN QoS 243
Foundation Summary 247
Q&A 252
Chapter 9 Introducing 802.1x and Configuring Encryption and Authentication
on Lightweight Access Points 255
"Do I Know This Already?" Quiz 255
Foundation Topics 258
Overview of WLAN Security 258
WLAN Security Issues 258
Evolution of WLAN Security Solutions 259
802.1x and EAP Authentication Protocols 260
EAP Authentication Protocols 262
Cisco LEAP 262
EAP-FAST 264
EAP-TLS 266
PEAP 267
WPA, 802.11i, and WPA2 269
Configuring Encryption and Authentication on Lightweight Access Points 272
Open Authentication 272
Static WEP Authentication 273
WPA Preshared Key 274
Web Authentication 276
802.1x Authentication 278
Foundation Summary 281
Q&A 285
Chapter 10 WLAN Management 287
"Do I Know This Already?" Quiz 287
Foundation Topics 291
The Need for WLAN Management 291
Cisco Unified Wireless Networks 291
Cisco WLAN Implementation 292
WLAN Components 294
CiscoWorks Wireless LAN Solution Engine 295
WLSE Software Features 295
WLSE Key Benefits 296
CiscoWorks WLSE and WLSE Express 296
Simplified WLSE Express Setup 297
WLSE Configuration Templates 298
WLSE IDS Features 298
WLSE Summary 298
Cisco Wireless Control System 299
WCS Location Tracking Options 300
WCS Base Software Features 300
WCS Location Software Features 301
WCS Location + 2700 Series Wireless Location Appliance Features 301
WCS System Features 301
Cisco WCS User Interface 302
Cisco WCS System Requirements 302
WCS Summary Pages 303
Wireless Location Appliance 304
Wireless Location Appliance Architecture 305
Wireless Location Appliance Applications 305
WCS Configuration Examples 306
WCS Login Steps 306
Changing the Root Password 306
Adding a Wireless LAN Controller 307
Configuring Access Points 308
WCS Map 309
Adding a Campus Map 309
Adding a New Building 310
Rogue Access Point Detection 312
Rogue Access Point Alarms 312
Rogue Access Point Location 313
Foundation Summary 314
Q&A 317
Part IV Appendix 319
Appendix A Answers to the "Do I Know This Already?" Quizzes and Q&A Sections 321
Chapter 1 Cisco VoIP Implementations 5
"Do I Know This Already?" Quiz 5
Foundation Topics 10
Introduction to VoIP Networks 10
Benefits of Packet Telephony Networks 10
Packet Telephony Components 11
Analog Interfaces 13
Digital Interfaces 14
Stages of a Phone Call 15
Distributed Versus Centralized Call Control 16
Digitizing and Packetizing Voice 19
Basic Voice Encoding: Converting Analog to Digital 19
Basic Voice Encoding: Converting Digital to Analog 20
The Nyquist Theorem 21
Quantization 22
Compression Bandwidth Requirements and Their Comparative Qualities 24
Digital Signal Processors 25
Encapsulating Voice Packets 27
End-to-End Delivery of Voice 27
Protocols Used in Voice Encapsulation 30
Reducing Header Overhead 32
Bandwidth Calculation 34
Impact of Voice Samples and Packet Size on Bandwidth 34
Data Link Overhead 37
Security and Tunneling Overhead 37
Calculating the Total Bandwidth for a VoIP Call 39
Effects of VAD on Bandwidth 41
Implementing VoIP Support in an Enterprise Network 42
Enterprise Voice Implementations 42
Voice Gateway Functions on a Cisco Router 44
Cisco Unified CallManager Functions 45
Enterprise IP Telephony Deployment Models 46
Single-Site Model 46
Multisite with Centralized Call Processing Model 46
Multisite with Distributed Call Processing Model 47
Clustering over WAN Model 48
Identifying Voice Commands in IOS Configurations 48
Call Admission Control (CAC) 49
Part II Quality of Service 55
Chapter 2 IP Quality of Service 57
"Do I Know This Already?" Quiz 57
Foundation Topics 62
Introduction to QoS 62
Converged Network Issues Related to QoS 62
Available Bandwidth 63
End-to-End Delay 64
Delay Variation 65
Packet Loss 66
Definition of QoS and the Three Steps to Implementing It 68
Implementing QoS 69
Identifying and Comparing QoS Models 72
Best-Effort Model 72
Integrated Services Model 73
Differentiated Services Model 74
QoS Implementation Methods 76
Legacy Command-Line Interface (CLI) 76
Modular QoS Command-Line Interface (MQC) 76
AutoQoS 79
Router and Security Device Manager (SDM) QoS Wizard 81
Foundation Summary 89
Q&A 91
Chapter 3 Classification, Marking, and NBAR 93
"Do I Know This Already?" Quiz 93
Foundation Topics 97
Classification and Marking 97
Layer 2 QoS: CoS on 802.1Q/P Ethernet Frame 98
Layer 2 QoS: DE and CLP on Frame Relay and ATM (Cells) 99
Layer 2 1/2 QoS: MPLS EXP Field 100
The DiffServ Model, Differentiated Services Code Point (DSCP), and Per-Hop Behavior
(PHB) 100
IP Precedence and DSCP 102
QoS Service Class 106
Trust Boundaries 108
Network Based Application Recognition (NBAR) 110
Cisco IOS Commands to Configure NBAR 112
Foundation Summary 118
Q&A 119
Chapter 4 Congestion Management and Queuing 123
"Do I Know This Already?" Quiz 123
Foundation Topics 127
Introduction to Congestion Management and Queuing 127
First-In-First-Out, Priority Queuing, Round-Robin, and Weighted Round-Robin Queuing 130
Weighted Fair Queuing 132
WFQ Classification and Scheduling 133
WFQ Insertion and Drop Policy 135
Benefits and Drawbacks of WFQ 135
Configuring and Monitoring WFQ 135
Class-Based Weighted Fair Queuing 138
Classification, Scheduling, and Bandwidth Guarantee 139
Benefits and Drawbacks of CBWFQ 140
Configuring and Monitoring CBWFQ 141
Low-Latency Queuing 142
Benefits of LLQ 144
Configuring and Monitoring LLQ 144
Foundation Summary 146
Q&A 147
Chapter 5 Congestion Avoidance, Policing, Shaping, and Link
Efficiency Mechanisms 149
"Do I Know This Already?" Quiz 149
Foundation Topics 153
Congestion Avoidance 153
Tail Drop and Its Limitations 153
Random Early Detection 154
Weighted Random Early Detection 156
Class-Based Weighted Random Early Detection 158
Configuring CBWRED 158
Traffic Shaping and Policing 163
Measuring Traffic Rates 165
Cisco IOS Policing and Shaping Mechanisms 167
Link Efficiency Mechanisms 167
Layer 2 Payload Compression 168
Header Compression 169
Link Fragmentation and Interleaving 171
Applying Link Efficiency Mechanisms 171
Foundation Summary 172
Q&A 175
Chapter 6 Implementing QoS Pre-Classify and Deploying End-to-End QoS 177
"Do I Know This Already?" Quiz 177
Foundation Topics 180
Implementing QoS Pre-Classify 180
Virtual Private Networks (VPN) 180
QoS Pre-Classify Applications 181
QoS Pre-Classification Deployment Options 183
Deploying End-to-End QoS 185
QoS Service Level Agreements (SLAs) 186
Enterprise Campus QoS Implementations 188
WAN Edge QoS Implementations 190
Control Plane Policing (CoPP) 192
Foundation Summary 194
Q&A 198
Chapter 7 Implementing AutoQoS 201
"Do I Know This Already?" Quiz 201
Foundation Topics 205
Introducing AutoQoS 205
Implementing and Verifying AutoQoS 207
Two-Step Deployment of AutoQoS Enterprise on Routers 209
Deploying AutoQoS VoIP on IOS-Based Catalyst Switches 210
Verifying AutoQoS on Cisco Routers and IOS-Based Catalyst Switches 212
AutoQoS Shortcomings and Remedies 215
Automation with Cisco AutoQoS 215
Common AutoQoS Problems 218
Interpreting and Modifying AutoQoS Configurations 219
Foundation Summary 222
Q&A 227
Part III Wireless LAN 229
Chapter 8 Wireless LAN QoS Implementation 231
"Do I Know This Already?" Quiz 231
Foundation Topics 235
The Need for Wireless LAN QoS 235
WLAN QoS Description 237
Split MAC Architecture and Light Weight Access Point 238
Current Wireless LAN QoS Implementation 239
Configuring Wireless LAN QoS 243
Foundation Summary 247
Q&A 252
Chapter 9 Introducing 802.1x and Configuring Encryption and Authentication
on Lightweight Access Points 255
"Do I Know This Already?" Quiz 255
Foundation Topics 258
Overview of WLAN Security 258
WLAN Security Issues 258
Evolution of WLAN Security Solutions 259
802.1x and EAP Authentication Protocols 260
EAP Authentication Protocols 262
Cisco LEAP 262
EAP-FAST 264
EAP-TLS 266
PEAP 267
WPA, 802.11i, and WPA2 269
Configuring Encryption and Authentication on Lightweight Access Points 272
Open Authentication 272
Static WEP Authentication 273
WPA Preshared Key 274
Web Authentication 276
802.1x Authentication 278
Foundation Summary 281
Q&A 285
Chapter 10 WLAN Management 287
"Do I Know This Already?" Quiz 287
Foundation Topics 291
The Need for WLAN Management 291
Cisco Unified Wireless Networks 291
Cisco WLAN Implementation 292
WLAN Components 294
CiscoWorks Wireless LAN Solution Engine 295
WLSE Software Features 295
WLSE Key Benefits 296
CiscoWorks WLSE and WLSE Express 296
Simplified WLSE Express Setup 297
WLSE Configuration Templates 298
WLSE IDS Features 298
WLSE Summary 298
Cisco Wireless Control System 299
WCS Location Tracking Options 300
WCS Base Software Features 300
WCS Location Software Features 301
WCS Location + 2700 Series Wireless Location Appliance Features 301
WCS System Features 301
Cisco WCS User Interface 302
Cisco WCS System Requirements 302
WCS Summary Pages 303
Wireless Location Appliance 304
Wireless Location Appliance Architecture 305
Wireless Location Appliance Applications 305
WCS Configuration Examples 306
WCS Login Steps 306
Changing the Root Password 306
Adding a Wireless LAN Controller 307
Configuring Access Points 308
WCS Map 309
Adding a Campus Map 309
Adding a New Building 310
Rogue Access Point Detection 312
Rogue Access Point Alarms 312
Rogue Access Point Location 313
Foundation Summary 314
Q&A 317
Part IV Appendix 319
Appendix A Answers to the "Do I Know This Already?" Quizzes and Q&A Sections 321