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BUILDING SCALABLE CISCO INTERN


en Paperback – mar 2010
Learn intermediate and advanced routing techniques with the only Cisco-authorized self-study book for CCNP routing foundation learning
  • Learn intermediate and advance routing techniques from the newest edition of the best-selling CCNP BSCI foundational learning book
  •  Rely on learning from the only Cisco-authorized book publisher
  •  Master your learning with tools like self-assessment review questions, configuration exercises, chapter objectives and summaries, key term definitions, job aids and command summaries
CCNP Self-Study: Building Scalable Cisco Internetworks (BSCI) , Third Edition is a Cisco authorized, self-paced learning tool for CCNP preparation. This book teaches readers to design, configure, maintain, and scale routed networks that are growing in size and complexity. The book covers routing principles of both distance vector and link-state routing protocols; IP addressing techniques; the theory behind the IGP and EGP routing protocols; and configuration and troubleshooting information for each protocol. Upon completion readers will be able to select and implement the appropriate Cisco IOS Software services required to build scalable, routed networks.

The book provides early and comprehensive foundation learning for the CCNP BSCI exam. This revision to the popular second edition is updated to include complete coverage of all important routing topics, including advanced IP addressing, routing principles, manipulating routing updates, and EIGRP, OSPF, IS-IS, and BGP configuration. Chapters open with a list of objectives to focus the reader's study. Configuration exercises at the end of each chapter and a master lab exercise that ties all the topics together in the last chapter help illuminate theoretical concepts. Key terms are highlighted and defined, and each chapter concludes with a summary to help review key concepts.
 
What's new in the book? The book matches changes to the CCNP course and exam as per Cisco Systems.
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Specificații

ISBN-13: 9781587142420
ISBN-10: 1587142422
Pagini: 864
Dimensiuni: 187 x 233 x 52 mm
Greutate: 1.36 kg
Ediția:Nouă
Editura: Cisco Systems
Locul publicării:Indianapolis, United States

Cuprins

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Part I: Network Architecture and Design
 
Chapter 1: Network Architecture Framework and Design Models
Converged Networks
Cisco Intelligent Information Network
Cisco Service-Oriented Network Architecture Framework
Cisco Enterprise Architecture
Cisco Hierarchical Network Model
Cisco Enterprise Composite Network Model
Routing and Routing Protocols Within the Enterprise Composite Network Model
Summary
Review Questions
 
Part II: IP Routing Protocols
 
Chapter 2: Routing Principles
IP Routing Overview
    Principles of Static Routing
    Configuring a Static Route
    Configuring a Static Default Route
    Principles of Dynamic Routing
    Principles of On-Demand Routing
    Configuring ODR
Characteristics of Routing Protocols
    Distance Vector, Link-State, and Hybrid Routing Protocols
    Classful Routing Protocol Concepts
    Classful Routing Protocol Behavior
    Summarizing Routes in a Discontiguous Network
    The ip classless Command
    Classless Routing Protocol Concepts
    RIPv2 and EIGRP Automatic Network-Boundary Summarization
RIP
    Characteristics of RIPv
    Characteristics of RIPv
    RIP Configuration Commands
IP Routing Protocol Comparisons
    Administrative Distance
    Floating Static Routes
    Criteria for Inserting Routes in the IP Routing Table
    Comparing Routing Protocols
Summary
Configuration Exercise: Basic Configuration and Migrating to a Classless Routing Protocol
    Objectives
    Visual Objective
    Command List
    Task 1: Setting Up the Edge Routers
    Task 2: Setting Up the Internal Routers
    Task 3: Exploring Classful Routing
    Task 4: Exploring Classless Forwarding
    Task 5: Optimizing Classless Routes for Scalability
    Exercise Verification
Review Questions
 
Chapter 3: Configuring the Enhanced Interior Gateway Routing Protocol
EIGRP Overview
    EIGRP Capabilities and Attributes
    Underlying Processes and Technologies
EIGRP Terminology and Operation
    EIGRP Terminology
    Populating EIGRP Tables
    EIGRP Packets
    EIGRP Hello Packets
    EIGRP Neighbors
    Neighbor Table
    EIGRP Reliability
    Initial Route Discovery
    Route Selection
    EIGRP Metric Calculation
    EIGRP Metric Calculation Example
    Routing Table and EIGRP DUAL
    Advertised Distance and Feasible Distance
    Successor and Feasible Successor
    DUAL Example
Configuring and Verifying EIGRP
    Basic EIGRP Configuration
    Basic EIGRP Configuration Example
    EIGRP Configuration Example Using the Wildcard Mask
    Configuring the ip default-network Command for EIGRP
    Route Summarization
    Configuring Manual Route Summarization
    EIGRP Load Balancing
    EIGRP and WAN Links
    EIGRP Link Utilization
    Examples of EIGRP on WANs
Configuring EIGRP Authentication
    Router Authentication
    EIGRP MD5 Authentication
    Configuring MD5 Authentication
    MD5 Authentication Configuration Example
    Verifying MD5 Authentication
    Troubleshooting MD5 Authentication
Using EIGRP in an Enterprise Network
    EIGRP Scalability
    EIGRP Route Summarization
    EIGRP Queries and Stuck-in-Active
    Preventing SIA Connections
    EIGRP Query Range
    Limiting the EIGRP Query Range
    Limiting Query Range with Summarization
    Limiting Query Range Using a Stub
    Graceful Shutdown
Verifying EIGRP Operation
    show ip route and show ip route eigrp for EIGRP Examples
    show ip protocols Example
    show ip eigrp interfaces Example
    show ip eigrp topology Example
    show ip eigrp traffic Example
    debug eigrp packets Examples
    debug ip eigrp Examples
Summary
References
Configuration Exercise: Configuring and Tuning EIGRP
    Exercise Objectives
    Visual Objective
    Command List
    Task 1: Configuring Basic EIGRP
    Task 2: Configuring EIGRP Summarization
    Task 3: Configuring the EIGRP Stub
    Task 4: Configuring an EIGRP Default Route
    Exercise Verification
Review Questions
 
Chapter 4: Configuring the Open Shortest Path First Protocol
OSPF Protocol Overview
    Link-State Routing Protocols
    OSPF Area Structure
    OSPF Areas
    Area Terminology
    OSPF Adjacencies
    OSPF Metric Calculation
    Link-State Data Structures
OSPF Packets
    Establishing OSPF Neighbor Adjacencies: Hello
    Exchange Process and OSPF Neighbor Adjacency States
    Maintaining Routing Information
    OSPF Link-State Sequence Numbers
Configuring Basic OSPF Routing
    Single-Area OSPF Configuration Example
    Multiarea OSPF Configuration Example
    Verifying OSPF Operations
    The show ip route ospf Command
    The show ip ospf interface Command
    The show ip ospf neighbor Command
    The debug ip ospf events Command
    OSPF Router ID
    Loopback Interfaces
    OSPF router-id Command
    Verifying the OSPF Router ID
OSPF Network Types
    Types of OSPF Networks
    Adjacency Behavior for a Point-to-Point Link
    Adjacency Behavior for a Broadcast Network
    Electing a DR and BDR
    Setting Priority for the DR Election
    Adjacency Behavior for a Nonbroadcast Multiaccess Network
    DR Election in an NBMA Topology
    OSPF over Frame Relay Configuration Options
    OSPF over NBMA Topology Modes of Operation
    Selecting the OSPF Network Type for NBMA Networks
    OSPF Broadcast Mode Configuration
    OSPF Nonbroadcast Mode Configuration
    OSPF Configuration in Point-to-Multipoint Mode
    Cisco Point-to-Multipoint Nonbroadcast Mode
    Using Subinterfaces in OSPF over Frame Relay Configuration
    Point-to-Point Subinterfaces
    Multipoint Subinterfaces
    OSPF Mode Summary
    Displaying OSPF Adjacency Activity
Summary
References
Configuration Exercise: Configuring and Examining OSPF in a Single Area
    Exercise Objective
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Configuring Single-Area OSPF Within Your Pod
    Task 3: Configuring a Stable OSPF Router ID
    Task 4: Observing the OSPF Process
    Task 5: Observing OSPF DR and BDR Elections
    Exercise Verification
Review Questions
 
Chapter 5: Advanced Open Shortest Path First Protocol Configuration
Types of OSPF Routers and LSAs
    Types of OSPF Routers
    OSPF LSA Types
    LSA Type 1: Router LSA
    LSA Type 2: Network LSA
    LSA Type 3: Summary LSA
    LSA Type 4: Summary LSA
    LSA Type 5: External LSA
Interpreting the OSPF LSDB and Routing Table
    OSPF LSDB
    OSPF Routing Table and Types of Routes
    Calculating the Costs of E1 and E2 Routes
    Configuring OSPF LSDB Overload Protection
    Changing the Cost Metric
OSPF Route Summarization
    Configuring OSPF Route Summarization on an ABR
    Configuring OSPF Route Summarization on an ASBR
    Route Summarization Configuration Example at an ABR
    Route Summarization Configuration Example at an ASBR
Creating a Default Route in OSPF
    The default-information originate Command
OSPF Special Area Types
    Configuring Stub Areas
    Configuring Totally Stubby Areas
    Interpreting Routing Tables in Different Types of OSPF Areas
    Configuring NSSAs
    Verifying All Area Types
OSPF Virtual Links
    Configuring OSPF Virtual Links
    Verifying OSPF Virtual Link Operation
Configuring OSPF Authentication
    Types of Authentication
    Configuring Simple Password Authentication
    Simple Password Authentication Example
    Verifying Simple Password Authentication
    Troubleshooting Simple Password Authentication
    Successful Simple Password Authentication Example
    Example: Troubleshooting Simple Password Authentication Problems
    Configuring MD5 Authentication
    MD5 Authentication Example
    Verifying MD5 Authentication
    Troubleshooting MD5 Authentication
    Successful MD5 Authentication Example
    Example: Troubleshooting MD5 Authentication Problems
Summary
References
Configuration Exercise 5-1: Configuring OSPF for Multiple Areas and Frame Relay Nonbroadcast
    Objectives
    Visual Objective
    Command List
    Task: Using the Nonbroadcast Network Type over Frame Relay
    Exercise Verification
Configuration Exercise 5-2: Configuring OSPF for Multiple Areas and Frame Relay Point to Multipoint and Point to Point
    Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Configuring OSPF over Frame Relay Using the Point-to-Multipoint OSPF Network Type
    Task 3: Configuring OSPF over Frame Relay Using the Point-to-Point OSPF Network Type
    Exercise Verification
Configuration Exercise 5-3: Tuning OSPF
    Objectives
    Visual Objective
    Command List
    Task 1: Examining the OSPF Database
    Task 2: Configure OSPF Route Summarization
    Task 3: Configure an OSPF Stub Area
    Exercise Verification
Review Questions
 
Chapter 6: Configuring the Integrated Intermediate System-to-Intermediate System Protocol
Introducing IS-IS and Integrated IS-IS Routing
    IS-IS Routing
    IS-IS Routing Levels
    IS-IS Routers
    Integrated IS-IS Routing
    Integrated IS-IS Design Principles
    Issues with Integrated IS-IS
    The ES-IS Protocol
    OSI Routing Levels
    Level 0 (L0) Routing
    IS-IS L1 Routing
    IS-IS L2 Routing
    Level 3 (L3) Routing
    Comparing IS-IS to OSPF
    IS-IS History
    Similarities Between IS-IS and OSPF
    Differences Between Integrated IS-IS and OSPF
IS-IS Routing Operation
    NSAP Addresses
    Integrated IS-IS NSAP Address Structure
    IS-IS Area Addresses
    IS-IS System ID
    NET Addresses
    IS-IS Router Operation
    Intra-Area and Interarea Addressing and Routing
    IS-IS Routing Examples
    Route Leaking
    OSI and IS-IS PDUs
    OSI PDUs
    IS-IS PDUs
    IS-IS LSPs
    Implementing IS-IS in Different Network Types
    Implementing IS-IS in Nonbroadcast Multiaccess (NBMA) Networks
    Implementing IS-IS in Broadcast Networks
    LSPs and IIHs
    Summary of Differences Between Broadcast and Point-to-Point Modes
    Link-State Database Synchronization
    LSP Flooding
    LSDB Synchronization
    LAN Adjacencies
    WAN Adjacencies
Configuring Integrated IS-IS
    Integrated IS-IS in a CLNS Environment
    Building an OSI Routing Table
    Building an IP Routing Table
    Integrated IS-IS Configuration
    Step 1: Define the Area and Addressing
    Step 2: Enable IS-IS on the Router
    Step 3: Configure the NET
    Step 4: Enable Integrated IS-IS on Interfaces
    Simple Integrated IS-IS Example
    Optimizing IS-IS
    Changing the IS-IS Router Level
    Changing the IS-IS Interface Level
    Changing the IS-IS Metric
    Tuning IS-IS Example
    Configuring IP Route Summarization in IS-IS
Verifying IS-IS Configuration and Structures
    Verifying IS-IS Configuration
    Verifying CLNS IS-IS Structures
    Troubleshooting Commands: CLNS
    Troubleshooting Commands: CLNS and IS-IS
    OSI Intra-Area and Interarea Routing Example
Summary
Configuration Exercise: Configuring Integrated IS-IS in Multiple Areas
    Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up and Preparing
    Task 2: Configuring Integrated IS-IS in Multiple Areas
    Exercise Verification
Review Questions
 
Chapter 7: Manipulating Routing Updates
Using Multiple IP Routing Protocols
    Considerations When Migrating to Another Routing Protocol
    Planning and Implementing a New IP Address Allocation
    Configuring a Secondary IP Address
    Migrating to a New Routing Protocol
    Redistribution Overview
    Redistribution Implementation Considerations
    Selecting the Best Route
    Administrative Distance
    Seed Metrics
    Default Seed Metrics
    Redistribution Techniques
    Configuring Redistribution
    The redistribute Command for RIP
    The redistribute Command for OSPF
    The redistribute Command for EIGRP
    The redistribute Command for IS-IS
    The default-metric Command
    The passive-interface Command
    Route Redistribution Example
Controlling Routing Update Traffic
    Static and Default Routes
    Using Distribute Lists to Control Routing Updates
    Distribute List Processing
    Configuring Distribute Lists
    IP Route Filtering with Distribution List Configuration Example
    Controlling Redistribution with Distribute Lists
    Using Route Maps to Control Routing Updates
    Route Map Applications
    Understanding Route Maps
    Configuring Route Maps
    Using Route Maps with Redistribution
    Route Maps to Avoid Route Feedback
    Using Administrative Distance to Influence the Route-Selection Process
    Selecting Routes with Administrative Distance
    Modifying Administrative Distance
    An Example of Redistribution Using Administrative Distance
    Verifying Redistribution Operation
Configuring DHCP
    DHCP Overview
    DHCP Operation
    DHCP Bindings
    Attribute Inheritance
    DHCP Options and Suboptions
    Configuring a DHCP Server
    Preparing for DHCP Configuration
    DHCP Server Configuration Tasks
    DHCP Server Configuration Commands
    DHCP Server Example
    DHCP Server Options Import Example
    Configuring a DHCP Relay Agent
    IP Helper Addresses
    DHCP Relay Agent Configuration Tasks
    DHCP Relay Agent Configuration Commands
    Configuring a DHCP Client
    Verifying DHCP
Summary
Configuration Exercise 7-1: Configuring Basic Redistribution
    Exercise Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Setting Up the Routing Protocols
    Task 3: Configuring Basic Redistribution
    Task 4: Filtering Routing Updates
    Exercise Verification
Configuration Exercise 7-2: Tuning Basic Redistribution
    Objectives
    Visual Objective
    Command List
    Task 1: Tuning Basic Redistribution with Route Maps
    Task 2: Filtering Routing Updates
    Exercise Verification
Review Questions
 
Chapter 8: Configuring the Border Gateway Protocol
BGP Terminology, Concepts, and Operation
    Autonomous Systems
    BGP Use Between Autonomous Systems
    Comparison with Other Scalable Routing Protocols
    Using BGP in an Enterprise Network
    BGP Multihoming Options
    Multihoming with Default Routes from All Providers
    Multihoming with Default Routes and Partial Table from All Providers
    Multihoming with Full Routes from All Providers
    BGP Path Vector Characteristics
    When to Use BGP
    When Not to Use BGP
    BGP Characteristics
    BGP Neighbor Relationships
    External BGP Neighbors
    Internal BGP Neighbors
    IBGP on All Routers in a Transit Path
    IBGP in a Transit AS
    IBGP in a Nontransit AS
    BGP Partial-Mesh and Full-Mesh Examples
    TCP and Full Mesh
    Routing Issues if BGP Not on in All Routers in a Transit Path
    BGP Synchronization
    BGP Tables
    BGP Message Types
    BGP Attributes
    Well-Known Attributes
    Optional Attributes
    Defined BGP Attributes
    The AS-Path Attribute
    The Next-Hop Attribute
    The Origin Attribute
    The Local Preference Attribute
    The Community Attribute
    The MED Attribute
    The Weight Attribute (Cisco Only)
    The Route Selection Decision Process
Configuring BGP
    Peer Groups
    Entering BGP Configuration Mode
    Defining BGP Neighbors and Activating BGP Sessions
    Shutting Down a BGP Neighbor
    Defining the Source IP Address
    EBGP Multihop
    Changing the Next-Hop Attribute
    Defining the Networks That BGP Advertises
    BGP Neighbor Authentication
    Configuring BGP Synchronization
    Resetting BGP Sessions
    Hard Reset of BGP Sessions
    Soft Reset of BGP Sessions Outbound
    Soft Reset of BGP Sessions Inbound
    BGP Configuration Examples
    Basic BGP Example
    Peer Group Example
    IBGP and EBGP Example
Verifying and Troubleshooting BGP
    show ip bgp Command Output Example
    show ip bgp rib-failure Command Output Example
    show ip bgp summary Command Output Example
    debug ip bgp updates Command Output Example
    Understanding and Troubleshooting BGP Neighbor States
    Idle State Troubleshooting
    Active State Troubleshooting
    Established State
Basic BGP Path Manipulation Using Route Maps
    BGP Path Manipulation
    The Path-Selection Decision Process with a Multihomed Connection
    Setting Local Preference
    Changing Local Preference for All Routes
    Local Preference Example
    Changing Local Preference Using Route Maps
    Setting the MED with Route Maps
    Changing the MED for All Routes
    Changing the MED Using Route Maps
    Configuring Weight
    Implementing BGP in an Enterprise Network
Summary
References
Configuration Exercise 8-1: Configuring Multihome BGP
    Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Configuring BGP
    Exercise Verification
Configuration Exercise 8-2: Configuring Full-Mesh IBGP
    Objectives
    Visual Objective
    Command List
    Task: Configuring Full-Mesh IBGP
    Exercise Verification
Configuration Exercise 8-3: BGP Path Manipulation Using MED and Local Preference with Route Maps
    Objectives
    Visual Objective
    Command List
    Task: Using MED and Local Preference with Route Maps for BGP Path Manipulation
    Exercise Verification
Review Questions
 
Part III: IP Multicast
 
Chapter 9: Implementing IP Multicast
Introduction to Multicast
    Multicast Versus Unicast
    Multicast Applications
    Advantages of Multicast
    Disadvantages of Multicast
    Multicast IP Addresses
    Layer 2 Multicast Addresses
    Learning About Multicast Sessions
IGMP and CGMP
    IGMP Version 1 (IGMPv1)
    IGMP Version 2 (IGMPv2)
    IGMPv2: Joining a Group
    IGMPv2: Leaving a Group
    IGMP Version 3 (IGMPv3)
    IGMPv3: Joining a Group
    IGMPv3: Operation
    Determining Which IGMP Version Is Running
    Multicast with Layer 2 Switches
    CGMP
    IGMP Snooping
PIM Routing Protocol
    PIM Terminology
    Distribution Trees
    Reverse Path Forwarding
    PIM Modes
    Multicast Distribution Trees
    Source Distribution Trees
    Shared Distribution Trees
    Multicast Distribution Tree Notation
    PIM-DM
    PIM-SM
    PIM Sparse-Dense Mode
IP Multicast Configuration and Verification
    Configuring PIM-SM and PIM Sparse-Dense Mode
    Configuring a Router to Be a Member of a Group or a Statically Connected Member
    Verifying IP Multicast
    Inspecting the IP Multicast Routing Table
    PIM Interfaces and Neighbors
    Checking RP Information
    Verifying IGMP Groups
    Verifying IGMP Snooping
Summary
References
Configuration Exercise: Configuring Multicast Routing
    Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Enable IP Multicast Routing
    Task 3: Configure PIM Sparse-Dense Mode on All Interfaces
    Exercise Verification
Review Questions
 
Part IV: IP Version 6
 
Chapter 10: Implementing IPv6
Introducing IPv6
    Features of IPv6
    IPv6 Address Space
    The Need for Larger Address Space
IPv6 Addressing
    IPv6 Packet Header
    Extension Headers
    MTU Discovery
    IPv6 Address Representation
    IPv6 Address Types
    Interface Identifiers in IPv6 Addresses
    IPv6 Global Unicast Addresses
    IPv6 Link-Local Unicast Addresses
    IPv6 Anycast Addresses
    IPv6 Multicast Addresses
    Stateless Autoconfiguration
    IPv6 Mobility
IPv6 Configuration and Using OSPF and Other Routing Protocols for IPv9
    IPv6 Routing Protocols
    Static Routing
    RIPng
    OSPFv1
    IS-IS for IPv1
    EIGRP for IPv2
    MP-BGP2
    OSPFv3 Compared to OSPFv2
    Similarities Between OSPFv2 and OSPFv3
    Differences Between OSPFv2 and OSPFv3
    OSPF LSA Types for IPv5
    IPv6 Configuration
    OSPFv3 Configuration
    Verifying IPv6 and OSPFv0
    clear ipv6 ospf Command
    show ipv6 route Command
    show ipv6 interface Command
    show ipv6 ospf interface Command
    show ipv6 ospf Command
    show ipv6 ospf neighbor Command
    show ipv6 ospf database Command
Transitioning IPv4 to IPv6
Dual Stack
    Tunneling
    Manually Configured Tunnels
    Other Tunneling Mechanisms
    6-to-4 Tunneling
    Translation Mechanisms
Summary
References
Configuration Exercise 10-1: Configuring IPv6 Addresses and OSPF for IPv6 Routing
    Objectives
    Visual Objective
    Command List
    Task 1: Cleaning Up
    Task 2: Configuring IPv6
    Task 3: Enable IPv6 OSPF
    Exercise Verification
Configuration Exercise 10-2: Configuring an IPv6 Tunnel
    Objectives
    Visual Objective
    Command List
    Task: Configuring the Tunnel Interface
    Exercise Verification
Review Questions
 
Part V: Appendixes
 
Acronyms and Abbreviations
 
Appendix A: Answers to Review Questions
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
 
Appendix B: Configuration Exercise Equipment Requirements and Backbone Configurations
Configuration Exercise Equipment Requirements
TFTP Server Setup
Multicast Traffic Generator
Configuration Exercise Setup Diagram
Configuration Exercise Equipment Wiring
Backbone Router Configurations
    BBR1 Configuration
    BBR2 Configuration
    Frame_Switch Configuration
 
Index

Notă biografică

Diane Teare
is a professional in the networking, training, and e-learning fields. She has more than 20 years of experience in designing, implementing, and troubleshooting network hardware and software and has also been involved in teaching, course design, and project management. She has extensive knowledge of network design and routing technologies and is an instructor with one of the largest authorized Cisco Learning Partners. She was recently the director of e-learning for the same company, where she was responsible for planning and supporting all the company’s e-learning offerings in Canada, including Cisco courses. Diane was part of the team that developed the latest version of the BSCI course. She has a bachelor’s degree in applied science in electrical engineering (BASc) and a master’s degree in applied science in management science (MASc). She is a certified Cisco Systems instructor and currently holds her CCNP and CCDP certifications. She coauthored the Cisco Press titlesCampus Network Design Fundamentals and the first two editions of this book; and edited CCDA Self-Study: Designing for Cisco Internetwork Solutions (DESGN) and Designing Cisco Networks.
 
Catherine Paquet has in-depth knowledge of security systems, remote access, and routing technology. She is a CCSP, a CCNP, and a CCSI with one of the largest Cisco Learning Partners. She started her internetworking career as a LAN manager, moved to MAN manager, and eventually became the nationwide WAN manager with a federal agency. Prior to starting Netrisec Inc., a network security consultancy, Catherine was the director of technical resources for a Cisco Learning Partner. Catherine currently works on network design and implementation projects and lectures on topics related to security frameworks, regulations, and return on security investments. In 2002 and 2003, she volunteered with the U.N. mission in Kabul, Afghanistan, to train Afghan public servants in the area of networking. Catherine has a master’s degree in business administration with a major in management information systems (MBA [MIS]). She coauthored the Cisco Press titles Campus Network Design Fundamentals, The Business Case for Network Security: Advocacy, Governance, and ROI, and the first two editions of this book, and edited Building Cisco Remote Access Networks.