CCNP ONT Official Exam Certification Guide (Exam 642-845) View Larger Image | Amir Ranjbar
Cisco Press, Hardcover, Bk&CD edition, Published May 2007, 500 pages, ISBN 1587201763 | List Price: $59.99
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CCNP ONT Official Exam Certification Guide is a best
of breed Cisco 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 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 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. 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.
Table of Contents
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
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