CCNP ONT Official Exam Certification Guide
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® No. 8669\ 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...
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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-ROMAmir Ranjbar, CCIE® No. 8669CCNP 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 managementCompanion CD-ROMThe 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.Category: Cisco CertificationCovers: ONT Exam 642-845
Part I Voice over IP 3Chapter 1 Cisco VoIP Implementations 5“Do I Know This Already?” Quiz 5Foundation Topics 10Introduction to VoIP Networks 10Benefits of Packet Telephony Networks 10Packet Telephony Components 11Analog Interfaces 13Digital Interfaces 14Stages of a Phone Call 15Distributed Versus Centralized Call Control 16Digitizing and Packetizing Voice 19Basic Voice Encoding: Converting Analog to Digital 19Basic Voice Encoding: Converting Digital to Analog 20The Nyquist Theorem 21Quantization 22Compression Bandwidth Requirements and Their Comparative Qualities 24Digital Signal Processors 25Encapsulating Voice Packets 27End-to-End Delivery of Voice 27Protocols Used in Voice Encapsulation 30Reducing Header Overhead 32Bandwidth Calculation 34Impact of Voice Samples and Packet Size on Bandwidth 34Data Link Overhead 37Security and Tunneling Overhead 37Calculating the Total Bandwidth for a VoIP Call 39Effects of VAD on Bandwidth 41Implementing VoIP Support in an Enterprise Network 42Enterprise Voice Implementations 42Voice Gateway Functions on a Cisco Router 44Cisco Unified CallManager Functions 45Enterprise IP Telephony Deployment Models 46Single-Site Model 46Multisite with Centralized Call Processing Model 46Multisite with Distributed Call Processing Model 47Clustering over WAN Model 48Identifying Voice Commands in IOS Configurations 48Call Admission Control (CAC) 49Part II Quality of Service 55Chapter 2 IP Quality of Service 57“Do I Know This Already?” Quiz 57Foundation Topics 62Introduction to QoS 62Converged Network Issues Related to QoS 62Available Bandwidth 63End-to-End Delay 64Delay Variation 65Packet Loss 66Definition of QoS and the Three Steps to Implementing It 68Implementing QoS 69Identifying and Comparing QoS Models 72Best-Effort Model 72Integrated Services Model 73Differentiated Services Model 74QoS Implementation Methods 76Legacy Command-Line Interface (CLI) 76Modular QoS Command-Line Interface (MQC) 76AutoQoS 79Router and Security Device Manager (SDM) QoS Wizard 81Foundation Summary 89Q&A 91Chapter 3 Classification, Marking, and NBAR 93“Do I Know This Already?” Quiz 93Foundation Topics 97Classification and Marking 97Layer 2 QoS: CoS on 802.1Q/P Ethernet Frame 98Layer 2 QoS: DE and CLP on Frame Relay and ATM (Cells) 99Layer 2 1/2 QoS: MPLS EXP Field 100The DiffServ Model, Differentiated Services Code Point (DSCP), and Per-Hop Behavior(PHB) 100IP Precedence and DSCP 102QoS Service Class 106Trust Boundaries 108Network Based Application Recognition (NBAR) 110Cisco IOS Commands to Configure NBAR 112Foundation Summary 118Q&A 119Chapter 4 Congestion Management and Queuing 123“Do I Know This Already?” Quiz 123Foundation Topics 127Introduction to Congestion Management and Queuing 127First-In-First-Out, Priority Queuing, Round-Robin, and Weighted Round-Robin Queuing 130Weighted Fair Queuing 132WFQ Classification and Scheduling 133WFQ Insertion and Drop Policy 135Benefits and Drawbacks of WFQ 135Configuring and Monitoring WFQ 135Class-Based Weighted Fair Queuing 138Classification, Scheduling, and Bandwidth Guarantee 139Benefits and Drawbacks of CBWFQ 140Configuring and Monitoring CBWFQ 141Low-Latency Queuing 142Benefits of LLQ 144Configuring and Monitoring LLQ 144Foundation Summary 146Q&A 147Chapter 5 Congestion Avoidance, Policing, Shaping, and LinkEfficiency Mechanisms 149“Do I Know This Already?” Quiz 149Foundation Topics 153Congestion Avoidance 153Tail Drop and Its Limitations 153Random Early Detection 154Weighted Random Early Detection 156Class-Based Weighted Random Early Detection 158Configuring CBWRED 158Traffic Shaping and Policing 163Measuring Traffic Rates 165Cisco IOS Policing and Shaping Mechanisms 167Link Efficiency Mechanisms 167Layer 2 Payload Compression 168Header Compression 169Link Fragmentation and Interleaving 171Applying Link Efficiency Mechanisms 171Foundation Summary 172Q&A 175Chapter 6 Implementing QoS Pre-Classify and Deploying End-to-End QoS 177“Do I Know This Already?” Quiz 177Foundation Topics 180Implementing QoS Pre-Classify 180Virtual Private Networks (VPN) 180QoS Pre-Classify Applications 181QoS Pre-Classification Deployment Options 183Deploying End-to-End QoS 185QoS Service Level Agreements (SLAs) 186Enterprise Campus QoS Implementations 188WAN Edge QoS Implementations 190Control Plane Policing (CoPP) 192Foundation Summary 194Q&A 198Chapter 7 Implementing AutoQoS 201“Do I Know This Already?” Quiz 201Foundation Topics 205Introducing AutoQoS 205Implementing and Verifying AutoQoS 207Two-Step Deployment of AutoQoS Enterprise on Routers 209Deploying AutoQoS VoIP on IOS-Based Catalyst Switches 210Verifying AutoQoS on Cisco Routers and IOS-Based Catalyst Switches 212AutoQoS Shortcomings and Remedies 215Automation with Cisco AutoQoS 215Common AutoQoS Problems 218Interpreting and Modifying AutoQoS Configurations 219Foundation Summary 222Q&A 227Part III Wireless LAN 229Chapter 8 Wireless LAN QoS Implementation 231“Do I Know This Already?” Quiz 231Foundation Topics 235The Need for Wireless LAN QoS 235WLAN QoS Description 237Split MAC Architecture and Light Weight Access Point 238Current Wireless LAN QoS Implementation 239Configuring Wireless LAN QoS 243Foundation Summary 247Q&A 252Chapter 9 Introducing 802.1x and Configuring Encryption and Authenticationon Lightweight Access Points 255“Do I Know This Already?” Quiz 255Foundation Topics 258Overview of WLAN Security 258WLAN Security Issues 258Evolution of WLAN Security Solutions 259802.1x and EAP Authentication Protocols 260EAP Authentication Protocols 262Cisco LEAP 262EAP-FAST 264EAP-TLS 266PEAP 267WPA, 802.11i, and WPA2 269Configuring Encryption and Authentication on Lightweight Access Points 272Open Authentication 272Static WEP Authentication 273WPA Preshared Key 274Web Authentication 276802.1x Authentication 278Foundation Summary 281Q&A 285Chapter 10 WLAN Management 287“Do I Know This Already?” Quiz 287Foundation Topics 291The Need for WLAN Management 291Cisco Unified Wireless Networks 291Cisco WLAN Implementation 292WLAN Components 294CiscoWorks Wireless LAN Solution Engine 295WLSE Software Features 295WLSE Key Benefits 296CiscoWorks WLSE and WLSE Express 296Simplified WLSE Express Setup 297WLSE Configuration Templates 298WLSE IDS Features 298WLSE Summary 298Cisco Wireless Control System 299WCS Location Tracking Options 300WCS Base Software Features 300WCS Location Software Features 301WCS Location + 2700 Series Wireless Location Appliance Features 301WCS System Features 301Cisco WCS User Interface 302Cisco WCS System Requirements 302WCS Summary Pages 303Wireless Location Appliance 304Wireless Location Appliance Architecture 305Wireless Location Appliance Applications 305WCS Configuration Examples 306WCS Login Steps 306Changing the Root Password 306Adding a Wireless LAN Controller 307Configuring Access Points 308WCS Map 309Adding a Campus Map 309Adding a New Building 310Rogue Access Point Detection 312Rogue Access Point Alarms 312Rogue Access Point Location 313Foundation Summary 314Q&A 317Part IV Appendix 319Appendix A Answers to the “Do I Know This Already?” Quizzes and Q&A Sections 321
