Top-Down Network Design

en Limba Engleză Hardback – 25 aug 2010

Network usage is continuing to accelerate as enterprise network users communicate via video-conferencing, develop products more collaboratively, and rely more heavily on networked tools. Top-Down Network Design, Third Edition presents a systematic, fully practical approach to designing networks that will keep pace with these changes. Thoroughly updated for today's newest technical and business trends, it covers all facets of enterprise network design and all elements of modern enterprise networks. The authors' innovative top-down approach starts by focusing on applications and user requirements, and only then turns to technology selection. Readers will discover how to systematically analyze business and technical requirements, and then select topologies and technologies that reflect this analysis. The authors walk through designing campus networks, data centers, remote access, and wide-area connectivity, and designing for security in an era of wireless networks and mobile users. They also present detailed coverage of performance, reliability, and scalability. Graphics are used extensively throughout to clarify concepts and present examples This Third Edition includes new coverage of designing networks that comply with IT Service Management processes, as well as an updated glossary. It also adds chapter-ending essay questions and design scenarios for readers who want to test their understanding of key concepts.

Citește tot Restrânge

Preț: 412^.18 lei

Preț vechi: 515^.22 lei
-20% Nou

Puncte Express: 618

:
72^.94€ • 85^.53$ • 64^.05£

Carte tipărită la comandă

Livrare economică 06-20 februarie 26

Adaugă în coș

Wish list
Gift list
Am citit!

Adaugă în listă

Preluare comenzi: 021 569.72.76

Specificații

ISBN-13: 9781587202834
ISBN-10: 1587202832
Pagini: 480
Ilustrații: Illustrations
Dimensiuni: 192 x 238 x 32 mm
Greutate: 0.96 kg
Ediția:Nouă
Editura: Pearson Education
Locul publicării:Indianapolis, United States

Descriere

Top-Down Network Design
Third Edition

Priscilla Oppenheimer

A systems analysis approach to enterprise network design

The authoritative book on designing networks that align with business goals

Top-Down Network Design, Third Edition, is a practical and comprehensive guide to designing enterprise networks that are reliable, secure, and scalable. The book uses a top-down approach to help you focus first on applications and user requirements before selecting devices, cabling, and other technologies to implement the network. The book takes you through an explanation of how to design networks that align with business goals so that the network can keep pace with changing user requirements.

This new edition provides a comprehensive look at enterprise network design and the different modules of an enterprise network. Using illustrations and real-world examples, the book covers campus network design, wireless networks, remote access, and wide-area connectivity. You learn how to analyze business and technical requirements and select topologies and technologies that are based on that analysis. A major focus is on security as network users become more mobile. You also develop an understanding of network performance factors and methods for building reliable networks that can scale as traffic loads increase.

This Third Edition includes updated and expanded material on wireless networks, virtual private networks (VPN), network security, network redundancy, modularity in network designs, dynamic addressing for IPv4 and IPv6, Ethernet scalability options (including 10-Gbps Ethernet, Metro Ethernet, and Long-Reach Ethernet), and networks that carry voice and data traffic. In addition you will learn how to build networks that can support real-time video, collaborative computing, and social networking tools and that adhere to the Cisco SAFE Security Reference Architecture.

Every chapter now includes a set of essay questions and design scenarios to give you a chance to practice what you have learned. The book also has a companion website at www.topdownbook.com, which includes updates to the book, links to white papers, and supplemental information about design resources.

Learn a network design process that results in networks that perform well, provide security, and scale to meet growing demands for bandwidth
Develop network designs that provide the high bandwidth and low delay required for real-time applications such as multimedia, distance learning, videoconferencing, teleprescene, virtual communities, and IP telephony
Master techniques for checking the health of an existing network to develop a baseline for measuring performance of a new network design
Explore solutions for meeting QoS requirements, including IETF controlled-load and guaranteed services, IP multicast, and advanced switching, queuing, and routing algorithms
Identify the advantages and disadvantages of various switching and routing protocols, including Rapid Spanning Tree Protocol (RSTP), IEEE 802.1Q, EIGRP, OSPF, and BGP4

This book is part of the Networking Technology Series from Cisco Press‚ which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Category: Networking
Covers: Network Design

Cuprins

Introduction
Part I Identifying Your Customer’s Needs and Goals
Chapter 1 Analyzing Business Goals and Constraints 3
Using a Top-Down Network Design Methodology 3
    Using a Structured Network Design Process 5
    Systems Development Life Cycles 6
    Plan Design Implement Operate Optimize (PDIOO) Network Life Cycle 7
Analyzing Business Goals 8
    Working with Your Client 8
    Changes in Enterprise Networks 10
        Networks Must Make Business Sense 10
        Networks Offer a Service 11
        The Need to Support Mobile Users 12
        The Importance of Network Security and Resiliency 12
    Typical Network Design Business Goals 13
    Identifying the Scope of a Network Design Project 14
    Identifying a Customer’s Network Applications 16
Analyzing Business Constraints 19
    Politics and Policies 19
    Budgetary and Staffing Constraints 20
    Project Scheduling 21
Business Goals Checklist 22
Summary 23
Review Questions 23
Design Scenario 24
Chapter 2 Analyzing Technical Goals and Tradeoffs 25
Scalability 25
    Planning for Expansion 26
    Expanding Access to Data 26
    Constraints on Scalability 27
Availability 27
    Disaster Recovery 28
    Specifying Availability Requirements 29
        Five Nines Availability 30
        The Cost of Downtime 31
        Mean Time Between Failure and Mean Time to Repair 31
Network Performance 32
    Network Performance Definitions 33
    Optimum Network Utilization 34
    Throughput 35
        Throughput of Internetworking Devices 36
        Application Layer Throughput 37
    Accuracy 38
    Efficiency 39
    Delay and Delay Variation 40
        Causes of Delay 41
        Delay Variation 43
    Response Time 44
Security 44
    Identifying Network Assets 45
    Analyzing Security Risks 46
        Reconnaissance Attacks 47
        Denial-of-Service Attacks 48
    Developing Security Requirements 48
Manageability 49
Usability 50
Adaptability 50
Affordability 51
Making Network Design Tradeoffs 52
Technical Goals Checklist 54
Summary 55
Review Questions 56
Design Scenario 56
Chapter 3 Characterizing the Existing Internetwork 59
Characterizing the Network Infrastructure 59
    Developing a Network Map 60
        Characterizing Large Internetworks 60
        Characterizing the Logical Architecture 62
        Developing a Modular Block Diagram 64
    Characterizing Network Addressing and Naming 64
    Characterizing Wiring and Media 65
    Checking Architectural and Environmental Constraints 68
        Checking a Site for a Wireless Installation 69
        Performing a Wireless Site Survey 70
Checking the Health of the Existing Internetwork 71
    Developing a Baseline of Network Performance 72
    Analyzing Network Availability 73
    Analyzing Network Utilization 73
        Measuring Bandwidth Utilization by Protocol 75
    Analyzing Network Accuracy 76
        Analyzing Errors on Switched Ethernet Networks 77
    Analyzing Network Efficiency 79
    Analyzing Delay and Response Time 80
    Checking the Status of Major Routers, Switches, and Firewalls 82
Network Health Checklist 83
Summary 84
Review Questions 84
Hands-On Project 85
Design Scenario 85
Chapter 4 Characterizing Network Traffic 87
Characterizing Traffic Flow 87
    Identifying Major Traffic Sources and Stores 87
    Documenting Traffic Flow on the Existing Network 89
    Characterizing Types of Traffic Flow for New Network Applications 90
        Terminal/Host Traffic Flow 91
        Client/Server Traffic Flow 91
        Peer-to-Peer Traffic Flow 93
        Server/Server Traffic Flow 94
        Distributed Computing Traffic Flow 94
        Traffic Flow in Voice over IP Networks 94
    Documenting Traffic Flow for New and Existing Network Applications 95
Characterizing Traffic Load 96
    Calculating Theoretical Traffic Load 97
    Documenting Application-Usage Patterns 99
    Refining Estimates of Traffic Load Caused by Applications 99
    Estimating Traffic Load Caused by Routing Protocols 101
Characterizing Traffic Behavior 101
    Broadcast/Multicast Behavior 101
    Network Efficiency 102
        Frame Size 103
        Windowing and Flow Control 103
        Error-Recovery Mechanisms 104
Characterizing Quality of Service Requirements 105
    ATM QoS Specifications 106
        Constant Bit Rate Service Category 107
        Real-time Variable Bit Rate Service Category 107
        Non-real-time Variable Bit Rate Service Category 107
        Unspecified Bit Rate Service Category 108
        Available Bit Rate Service Category 108
        Guaranteed Frame Rate Service Category 108
    IETF Integrated Services Working Group QoS Specifications 109
        Controlled-Load Service 110
        Guaranteed Service 110
    IETF Differentiated Services Working Group QoS Specifications 111
    Grade of Service Requirements for Voice Applications 112
    Documenting QoS Requirements 113
Network Traffic Checklist 114
Summary 114
Review Questions 114
Design Scenario 115
Summary for Part I 115
Part II Logical Network Design
Chapter 5 Designing a Network Topology 119
Hierarchical Network Design 120
    Why Use a Hierarchical Network Design Model? 121
    Flat Versus Hierarchical Topologies 122
        Flat WAN Topologies 122
        Flat LAN Topologies 123
    Mesh Versus Hierarchical-Mesh Topologies 124
    Classic Three-Layer Hierarchical Model 125
        Core Layer 127
        Distribution Layer 127
        Access Layer 128
    Guidelines for Hierarchical Network Design 128
Redundant Network Design Topologies 130
    Backup Paths 131
    Load Sharing 132
Modular Network Design 133
    Cisco SAFE Security Reference Architecture 133
Designing a Campus Network Design Topology 135
    Spanning Tree Protocol 135
        Spanning Tree Cost Values 136
        Rapid Spanning Tree Protocol 137
        RSTP Convergence and Reconvergence 138
        Selecting the Root Bridge 139
        Scaling the Spanning Tree Protocol 140
    Virtual LANs 141
        Fundamental VLAN Designs 142
    Wireless LANs 144
        Positioning an Access Point for Maximum Coverage 145
        WLANs and VLANs 146
        Redundant Wireless Access Points 146
    Redundancy and Load Sharing in Wired LANs 147
    Server Redundancy 148
    Workstation-to-Router Redundancy 150
        Hot Standby Router Protocol 152
        Gateway Load Balancing Protocol 153
Designing the Enterprise Edge Topology 153
    Redundant WAN Segments 153
        Circuit Diversity 154
    Multihoming the Internet Connection 154
    Virtual Private Networking 157
        Site-to-Site VPNs 158
        Remote-Access VPNs 159
    Service Provider Edge 160
Secure Network Design Topologies 162
    Planning for Physical Security 162
    Meeting Security Goals with Firewall Topologies 162
Summary 163
Review Questions 165
Design Scenario 165
Chapter 6 Designing Models for Addressing and Numbering 167
Guidelines for Assigning Network Layer Addresses 168
    Using a Structured Model for Network Layer Addressing 168
    Administering Addresses by a Central Authority 169
    Distributing Authority for Addressing 170
    Using Dynamic Addressing for End Systems 170
        IP Dynamic Addressing 171
        IP Version 6 Dynamic Addressing 174
        Zero Configuration Networking 175
    Using Private Addresses in an IP Environment 175
        Caveats with Private Addressing 177
        Network Address Translation 177
Using a Hierarchical Model for Assigning Addresses 178
    Why Use a Hierarchical Model for Addressing and Routing? 178
    Hierarchical Routing 179
    Classless Interdomain Routing 179
    Classless Routing Versus Classful Routing 180
    Route Summarization (Aggregation) 181
        Route Summarization Example 182
        Route Summarization Tips 183
    Discontiguous Subnets 183
    Mobile Hosts 184
    Variable-Length Subnet Masking 185
    Hierarchy in IP Version 6 Addresses 186
        Link-Local Addresses 187
        Global Unicast Addresses 188
        IPv6 Addresses with Embedded IPv4 Addresses 189
Designing a Model for Naming 189
    Distributing Authority for Naming 190
    Guidelines for Assigning Names 191
    Assigning Names in a NetBIOS Environment 192
    Assigning Names in an IP Environment 193
        The Domain Name System 193
        Dynamic DNS Names 194
        IPv6 Name Resolution 195
Summary 195
Review Questions 196
Design Scenario 197
Chapter 7 Selecting Switching and Routing Protocols 199
Making Decisions as Part of the Top-Down Network Design Process 200
Selecting Switching Protocols 201
    Switching and the OSI Layers 202
    Transparent Bridging 202
    Selecting Spanning Tree Protocol Enhancements 203
        PortFast 204
        UplinkFast and BackboneFast 204
        Unidirectional Link Detection 205
    LoopGuard 206
    Protocols for Transporting VLAN Information 207
        IEEE 802.1Q 207
        Dynamic Trunk Protocol 208
        VLAN Trunking Protocol 208
Selecting Routing Protocols 209
    Characterizing Routing Protocols 209
        Distance-Vector Routing Protocols 210
        Link-State Routing Protocols 212
        Routing Protocol Metrics 214
        Hierarchical Versus Nonhierarchical Routing Protocols 214
        Interior Versus Exterior Routing Protocols 214
        Classful Versus Classless Routing Protocols 214
        Dynamic Versus Static and Default Routing 215
        On-Demand Routing 216
        Scalability Constraints for Routing Protocols 216
        Routing Protocol Convergence 217
    IP Routing 218
        Routing Information Protocol 218
        Enhanced Interior Gateway Routing Protocol 219
        Open Shortest Path First 221
        Intermediate System-to-Intermediate System 224
        Border Gateway Protocol 225
    Using Multiple Routing Protocols in an Internetwork 225
        Routing Protocols and the Hierarchical Design Model 226
        Redistribution Between Routing Protocols 227
        Integrated Routing and Bridging 229
A Summary of Routing Protocols 230
Summary 231
Review Questions 231
Design Scenario 232
Chapter 8 Developing Network Security Strategies 233
Network Security Design 233
    Identifying Network Assets 234
    Analyzing Security Risks 234
    Analyzing Security Requirements and Tradeoffs 235
    Developing a Security Plan 235
    Developing a Security Policy 236
        Components of a Security Policy 237
    Developing Security Procedures 237
    Maintaining Security 237
Security Mechanisms 238
    Physical Security 238
    Authentication 239
    Authorization 239
    Accounting (Auditing) 240
    Data Encryption 240
        Public/Private Key Encryption 241
    Packet Filters 243
    Firewalls 244
    Intrusion Detection and Prevention Systems 244
Modularizing Security Design 245
    Securing Internet Connections 245
        Securing Public Servers 246
        Securing E-Commerce Servers 247
    Securing Remote-Access and VPNs 248
        Securing Remote-Access Technologies 248
        Securing VPNs 249
    Securing Network Services and Network Management 250
    Securing Server Farms 251
    Securing User Services 252
    Securing Wireless Networks 253
        Authentication in Wireless Networks 254
        Data Privacy in Wireless Networks 258
Summary 261
Review Questions 261
Design Scenario 262
Chapter 9 Developing Network Management Strategies 263
Network Management Design 263
    Proactive Network Management 264
    Network Management Processes 264
        Fault Management 265
        Configuration Management 266
        Accounting Management 266
        Performance Management 266
        Security Management 268
Network Management Architectures 269
    In-Band Versus Out-of-Band Monitoring 270
    Centralized Versus Distributed Monitoring 270
Selecting Network Management Tools and Protocols 271
    Selecting Tools for Network Management 271
    Simple Network Management Protocol 271
        Management Information Bases (MIB) 272
        Remote Monitoring (RMON) 273
    Cisco Discovery Protocol 274
    Cisco NetFlow Accounting 276
    Estimating Network Traffic Caused by Network Management 276
Summary 277
Review Questions 278
Design Scenario 278
Summary for Part II 279
Part III Physical Network Design
Chapter 10 Selecting Technologies and Devices for Campus Networks 283
LAN Cabling Plant Design 284
    Cabling Topologies 284
        Building-Cabling Topologies 285
        Campus-Cabling Topologies 285
    Types of Cables 285
LAN Technologies 289
    Ethernet Basics 290
        Ethernet and IEEE 802.3 290
    Ethernet Technology Choices 291
        Half-Duplex and Full-Duplex Ethernet 292
        100-Mbps Ethernet 292
        Gigabit Ethernet 293
        10-Gbps Ethernet 295
Selecting Internetworking Devices for a Campus Network Design 299
    Criteria for Selecting Campus Internetworking Devices 300
    Optimization Features on Campus Internetworking Devices 302
Example of a Campus Network Design 303
    Background Information for the Campus Network Design Project 303
    Business Goals 304
    Technical Goals 304
    Network Applications 305
    User Communities 306
    Data Stores (Servers) 307
    Current Network at WVCC 307
        Traffic Characteristics of Network Applications 310
        Summary of Traffic Flows 311
        Performance Characteristics of the Current Network 312
    Network Redesign for WVCC 313
        Optimized IP Addressing and Routing for the Campus Backbone 313
        Wireless Network 314
        Improved Performance and Security for the Edge of the Network 315
Summary 316
Review Questions 317
Design Scenario 317
Chapter 11 Selecting Technologies and Devices for Enterprise Networks 319
Remote-Access Technologies 320
    PPP 321
        Multilink PPP and Multichassis Multilink PPP 321
        Password Authentication Protocol and Challenge Handshake
        Authentication Protocol 322
    Cable Modem Remote Access 323
        Challenges Associated with Cable Modem Systems 324
    Digital Subscriber Line Remote Access 325
        Other DSL Implementations 326
        PPP and ADSL 326
Selecting Remote-Access Devices for an Enterprise
    Network Design 327
    Selecting Devices for Remote Users 327
    Selecting Devices for the Central Site 328
WAN Technologies 328
    Systems for Provisioning WAN Bandwidth 329
    Leased Lines 330
    Synchronous Optical Network 331
    Frame Relay 332
        Frame Relay Hub-and-Spoke Topologies and Subinterfaces 333
        Frame Relay Congestion Control Mechanisms 335
        Frame Relay Traffic Control 335
        Frame Relay/ATM Interworking 336
    ATM 337
        Ethernet over ATM 337
    Metro Ethernet 338
    Selecting Routers for an Enterprise WAN Design 339
    Selecting a WAN Service Provider 340
Example of a WAN Design 341
    Background Information for the WAN Design Project 341
    Business and Technical Goals 342
    Network Applications 343
    User Communities 343
    Data Stores (Servers) 344
    Current Network 344
    Traffic Characteristics of the Existing WAN 345
    WAN Design for Klamath Paper Products 346
Summary 348
Review Questions 349
Design Scenario 349
Summary for Part III 350
Part IV Testing, Optimizing, and Documenting Your Network Design
Chapter 12 Testing Your Network Design 353
Using Industry Tests 354
Building and Testing a Prototype Network System 355
    Determining the Scope of a Prototype System 355
    Testing a Prototype on a Production Network 356
Writing and Implementing a Test Plan for Your Network Design 357
    Developing Test Objectives and Acceptance Criteria 357
    Determining the Types of Tests to Run 358
    Documenting Network Equipment and Other Resources 359
    Writing Test Scripts 360
    Documenting the Project Timeline 361
    Implementing the Test Plan 361
Tools for Testing a Network Design 362
    Types of Tools 362
    Examples of Network Testing Tools 363
        CiscoWorks Internetwork Performance Monitor 364
        WANDL Network Planning and Analysis Tools 364
        OPNET Technologies 364
        Ixia Tools 365
        NetIQ Voice and Video Management Solution 365
        NetPredict’s NetPredictor 365
Summary 366
Review Questions 366
Design Scenario 366
Chapter 13 Optimizing Your Network Design 367
Optimizing Bandwidth Usage with IP Multicast Technologies 368
    IP Multicast Addressing 369
    Internet Group Management Protocol 370
    Multicast Routing Protocols 370
        Distance Vector Multicast Routing Protocol 371
        Protocol Independent Multicast 371
Reducing Serialization Delay 372
    Link-Layer Fragmentation and Interleaving 373
    Compressed Real-Time Transport Protocol 374
Optimizing Network Performance to Meet Quality of Service Requirements 374
    IP Precedence and Type of Service 375
        IP Differentiated Services Field 376
    Resource Reservation Protocol 377
    Common Open Policy Service Protocol 379
    Classifying LAN Traffic 379
Cisco IOS Features for Optimizing Network Performance 380
    Switching Techniques 380
        Classic Methods for Layer 3 Packet Switching 381
        NetFlow Switching 382
        Cisco Express Forwarding 382
    Queuing Services 383
        First-In, First-Out Queuing 383
        Priority Queuing 384
        Custom Queuing 384
        Weighted Fair Queuing 385
        Class-Based Weighted Fair Queuing 386
        Low-Latency Queuing 387
    Random Early Detection 388
        Weighted Random Early Detection 388
    Traffic Shaping 389
    Committed Access Rate 389
Summary 389
Review Questions 390
Design Scenario 391
Chapter 14 Documenting Your Network Design 393
Responding to a Customer’s Request for Proposal 394
Contents of a Network Design Document 395
    Executive Summary 396
    Project Goal 396
    Project Scope 396
    Design Requirements 397
        Business Goals 397
        Technical Goals 398
        User Communities and Data Stores 399
        Network Applications 399
    Current State of the Network 399
    Logical Design 400
    Physical Design 400
    Results of Network Design Testing 401
    Implementation Plan 401
        Project Schedule 402
    Project Budget 403
        Return on Investment 403
    Design Document Appendix 404
Summary 404
Review Questions 405
Design Scenario 405
Glossary 407

9781587202834    TOC    8/2/2010

Notă biografică

Priscilla Oppenheimer has been developing data communications and networking systems since 1980 when she earned her master’s degree in information science from the University of Michigan. After many years as a software developer, she became a technical instructor and training developer and has taught more than 3000 network engineers from most of the Fortune 500 companies. Her employment at such companies as Apple Computer, Network General, and Cisco gave her a chance to troubleshoot real-world network design problems and the opportunity to develop a practical methodology for enterprise network design. Priscilla was one of the developers of the Cisco Internetwork Design course and the creator of the Designing Cisco Networks course. Priscilla teaches network design, configuration, and troubleshooting around the world and practices what she preaches in her network consulting business.

Textul de pe ultima copertă

Top-Down Network DesignThird Edition Priscilla Oppenheimer A systems analysis approach to enterprise network design The authoritative book on designing networks that align with business goals" ""Top-Down Network Design," Third Edition, is a practical and comprehensive guide to designing enterprise networks that are reliable, secure, and scalable. The book uses a top-down approach to help you focus first on applications and user requirements before selecting devices, cabling, and other technologies to implement the network. The book takes you through an explanation of how to design networks that align with business goals so that the network can keep pace with changing user requirements. This new edition provides a comprehensive look at enterprise network design and the different modules of an enterprise network. Using illustrations and real-world examples, the book covers campus network design, wireless networks, remote access, and wide-area connectivity. You learn how to analyze business and technical requirements and select topologies and technologies that are based on that analysis. A major focus is on security as network users become more mobile. You also develop an understanding of network performance factors and methods for building reliable networks that can scale as traffic loads increase. This Third Edition includes updated and expanded material on wireless networks, virtual private networks (VPN), network security, network redundancy, modularity in network designs, dynamic addressing for IPv4 and IPv6, Ethernet scalability options (including 10-Gbps Ethernet, Metro Ethernet, and Long-Reach Ethernet), and networks that carry voice and data traffic. In addition you will learn how to build networks that can support real-time video, collaborative computing, and social networking tools and that adhere to the Cisco SAFE Security Reference Architecture. Every chapter now includes a set of essay questions and design scenarios to give you a chance to practice what you have learned. The book also has a companion website at www.topdownbook.com, which includes updates to the book, links to white papers, and supplemental information about design resources.

Learn a network design process that results in networks that perform well, provide security, and scale to meet growing demands for bandwidth
Develop network designs that provide the high bandwidth and low delay required for real-time applications such as multimedia, distance learning, videoconferencing, teleprescene, virtual communities, and IP telephony
Master techniques for checking the health of an existing network to develop a baseline for measuring performance of a new network design
Explore solutions for meeting QoS requirements, including IETF controlled-load and guaranteed services, IP multicast, and advanced switching, queuing, and routing algorithms
Identify the advantages and disadvantages of various switching and routing protocols, including Rapid Spanning Tree Protocol (RSTP), IEEE 802.1Q, EIGRP, OSPF, and BGP4

"This book is part of the Networking Technology Series from Cisco Press' which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers." Category: NetworkingCovers: Network Design

Papetărie, jocuri, reviste