9781587132124

Designing and Supporting Computer Networks CCNA Discovery Learning Guide Kenneth D. Stewart III bull; Aubrey Adams Designing and Supporting Computer Networks, CCNA Discovery Learning Guideis the official supplemental textbook for the Designing and Supporting Computer Networks course in the Ciscoreg; Networking Academyreg; CCNAreg; Discovery curriculum version 4. In this course, the last of four in the new curriculum, you progress through a variety of case studies and role-playing exercises, which include gathering requirements, designing basic networks, establishing proof-of-concept, and performing project management tasks. In addition, within the context of a pre-sales support position, you learn lifecycle services, including upgrades, competitive analyses, and system integration. TheLearning Guide, written and edited by instructors, is designed as a portable desk reference to use anytime, anywhere to reinforce the material from the course and organize your time. TheLearning Guiders"sfeatures help you focus on important concepts to succeed in this course: Chapter ObjectivesReview core concepts by answering the focus questions listed at the beginning of each chapter. Key TermsRefer to the lists of networking vocabulary introduced and highlighted in context in each chapter. The Glossary defines each key term. Summary of Activities and LabsMaximize your study time with this complete list of all associated exercises at the end of each chapter. Check Your UnderstandingEvaluate your readiness with the end-of-chapter questions that match the style of questions you see in the online course quizzes. The answer key explains each answer. Challenge Questions and ActivitiesApply a deeper understanding of the concepts with these challenging end-of-chapter questions and activities. The answer key explains each answer. Hands-on LabsMaster the practical, hands-on skills of the course by performing all the tasks in the course labs included in Part II of the Learning Guide. Portfolio DocumentsDevelop a professional network design portfolio as you work through real-life case studies. All the course portfolio documents and support materials are provided for you in this Learning Guide and on the CD-ROM. Kenneth D. Stewart III teaches computer science and computer networking courses at Flour Bluff High School and Delmar College in Corpus Christi, Texas. Aubrey Adams is an electronic and computer system engineering lecturer and Cisco Networking Academy CCNA/IP Telephony instructor at Central College of Technical and Further Education (TAFE) in Perth, Western Australia. How ToLook for this icon to study the steps you need to learn to perform certain tasks. Interactive ActivitiesReinforce your understanding of topics with exercises from the online course identified throughout the book with this icon. The files for these activities are on the accompanying CD-ROM. Packet Tracer ActivitiesExplore and visualize networking concepts using Packet Tracer exercises interspersed throughout some chapters. The files for these activities are on the accompanying CD-ROM. Packet Tracer v4.1 software developed by Cisco is available separately. Hands-on LabsMaster

Kenneth D. Stewart III teaches computer science and computer networking courses at Flour Bluff High School and Delmar College in Corpus Christi, Texas. Kenneth has worked in the field for more than 17 years and has taught for the past 10 years. Before teaching, Kenneth was a nuclear, biological, and chemical warfare specialist in the 82nd Airborne Division at Ft. Bragg, North Carolina. He holds two degrees in computer science and is earning another in occupational career and technology development from Texas A&M, Corpus Christi.

Aubrey Adams is an electronic and computer system engineering lecturer and Cisco Networking Academy CCNA/IP Telephony instructor at Central College of Technical and Further Education (TAFE) in Perth, Western Australia. Coming from a background in telecommunications design, with qualifications in electronic engineering and management, and graduate diplomas in computing and education, he teaches across a broad range of related vocational education and training areas. In 2007, Aubrey took leave from Central TAFE to work as a member of the Networking Academy CCNA Exploration and Discovery course development teams. Since returning to teaching, he continues to contribute to Academy curriculum maintenance and development.

Jim Lorenz is an instructor, and senior training developer for the Cisco Networking Academy Program. He holds a Bachelor’s degree in Computer Information Systems and has over 20 years of experience in networking and IT. Jim has developed course materials, including content, labs and textbooks for the CCNA and CCNP curricula. Most recently he coordinated lab development for the CCNA Security course.

Concepts
Introduction	p. xlii
Introducing Network Design Concepts	p. 1
Objectives	p. 1
Key Terms	p. 1
Discovering Network Design Basics	p. 2
Network Design Overview	p. 2
Network Requirements	p. 2
Building a Good Network	p. 2
Network Requirements	p. 3
Fundamental Design Goals	p. 3
The Benefits of a Hierarchical Network Design	p. 3
Hierarchical Network Design	p. 3
Modular Design of Cisco Enterprise Architectures	p. 5
Network Design Methodologies	p. 6
Identifying Network Requirements	p. 7
Characterizing the Existing Network	p. 7
Designing the Network Topology	p. 7
Investigating Core Layer Design Considerations	p. 9
What Happens at the Core Layer?	p. 9
Goals of the Core Layer	p. 10
Core Layer Technologies	p. 11
Redundant Links	p. 11
Mesh Topology	p. 11
Network Traffic Prioritization	p. 12
Preventing Failures	p. 12
Reducing Human Error	p. 13
Network Convergence	p. 13
Convergence Definition and Factors	p. 14
Selecting a Routing Protocol for Acceptable Convergence Time	p. 14
Design Considerations with Convergence in Mind	p. 14
Investigating Distribution Layer Design Considerations	p. 14
What Happens at the Distribution Layer?	p. 14
Distribution Layer Routing	p. 14
Trunks	p. 15
Redundant Links	p. 15
Distribution Layer Topology	p. 16
Limiting the Scope of Network Failure	p. 16
Limiting the Size of Failure Domains	p. 17
Switch Block Deployment	p. 17
Building a Redundant Network at the Distribution Layer	p. 18
Traffic Filtering at the Distribution Layer	p. 19
Filtering Network Traffic	p. 19
Complex ACLs	p. 20
Placing ACLs	p. 20
Routing Protocols at the Distribution Layer (1.3.5)	p. 21
Route Summarization	p. 21
Investigating Access Layer Design Considerations	p. 22
What Happens at the Access Layer?	p. 22
Access Layer Physical Considerations	p. 23
Wiring Closets	p. 23
The Impact of Converged Networking at the Access Layer	p. 24
The Need for Availability at the Access Layer	p. 24
Access Layer Management	p. 25
Designing for Manageability	p. 25
Network Topologies at the Access Layer	p. 26
How VLANs Segregate and Control Network Traffic	p. 26
VLANs in the Past	p. 26
VLANs Now	p. 27
Services at the Network Edge	p. 27
Providing QoS to Network Applications	p. 27
Classification	p. 28
Security at the Network Edge	p. 28
Security Measures	p. 29
Providing Physical Security	p. 29
Securing Access Layer Networking Devices	p. 30
Recommended Practice on Security	p. 30
Investigating Server Farms and Security	p. 30
What Is a Server Farm?	p. 30
Security, Firewalls, and Demilitarized Zones	p. 32
Protecting Server Farms Against Attack	p. 32
Demilitarized Zones	p. 33
Protecting Against Internal Attacks	p. 33
High Availability	p. 33
Building In Redundancy	p. 33
Virtualization	p. 34
Investigating Wireless Network Considerations	p. 34
Network Design Considerations Unique to WLANs	p. 34
Physical Network Design	p. 35
Logical Network Design	p. 36
Network Access Considerations Unique to WLANs	p. 37
Open Guest Access	p. 37
Secured Employee Access	p. 37
Best Practice Guidelines for WLAN Access	p. 37
Supporting WANs and Remote Workers	p. 39
Design Considerations at the Enterprise Edge	p. 39
Cost of Bandwidth	p. 39
QoS	p. 40
Security	p. 40
Remote Access	p. 40
Integrating Remote Sites into the Network Design	p. 40
MPLS	p. 41
VPNs	p. 42
Redundancy and Backup Links	p. 42
Summary	p. 44
Activities and Labs	p. 45
Check Your Understanding	p. 46
Challenge Questions and Activities	p. 48
Table of Contents provided by Publisher. All Rights Reserved.

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The New copy of this book will include any supplemental materials advertised. Please check the title of the book to determine if it should include any access cards, study guides, lab manuals, CDs, etc.

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Introduction IntroductionThe following Introduction pertains to the Learning Guide as a whole.Cisco Networking Academy is a comprehensive e-learning program that delivers information technology skills to students around the world. The CCNA Discovery curriculum consists of four courses that provide a comprehensive overview of networking, from fundamentals to advanced applications and services. The goal of the Designing and Supporting Computer Networks course is to assist you in developing the skills necessary to design small enterprise LANs and WANs. The course provides an introduction to collecting customer requirements, translating those requirements into equipment and protocol needs, and creating a network topology that addresses the needs of the customer. It will also familiarize you with how to create and implement a design proposal for a customer. This course prepares you with the skills required for entry-level presales support and entry-level network design jobs.Designing and Supporting Computer Networks, CCNA Discovery Learning Guideis the official supplemental textbook for the fourth course in v4.xof the Cisco Networking Academy CCNA Discovery online curriculum. As a textbook, this book provides a ready reference to explain the same networking concepts, technologies, protocols, and devices as the online curriculum. In addition, it contains all the interactive activities, Packet Tracer activities, and hands-on labs from the online curriculum.This book emphasizes key topics, terms, and activities and provides many alternative explanations and examples as compared with the course. You can use the online curriculum as directed by your instructor and then also use thisLearning Guide'sstudy tools to help solidify your understanding of all the topics. In addition, the book includes the following:Additional key Glossary termsAdditional Check Your Understanding and Challenge questionsInteractive activities and Packet Tracer activities (and all supplemental documents associated with them) on the CD-ROM Goal of This BookFirst and foremost, by providing a fresh, complementary perspective of the online content, this book helps you learn all the required materials of the fourth course in the Networking Academy CCNA Discovery curriculum. As a secondary goal, individuals who do not always have Internet access can use this text as a mobile replacement for the online curriculum. In those cases, you can read the appropriate sections of this book, as directed by your instructor, and learn the topics that appear in the online curriculum. Audience for This BookThis book's main audience is anyone taking the fourth CCNA Discovery course of the Networking Academy curriculum. Many Networking Academies use this textbook as a required tool in the course, and other Networking Academies recommend theLearning Guidesas an additional source of study and practice material. Book FeaturesThe educational features of this book focus on supporting topic coverage, readability, and practice of the course material to facilitate your full understanding of the course material. Topic CoverageThe following features give you a thorough overview of the topics covered in each chapter so that you can make constructive use of your study time:Objectives: Listed at the beginning of each chapter, the objectives reference the core concepts covered in the chapter. The objectives match the objectives stated in the corresponding chapters of the online curriculum; however, the question format in theLearning Guideencourages you to think about finding the answers as you read the chapter."How-to" feature: When this book covers a set of steps that you need to perform for certain ta

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Designing and Supporting Computer Networks, CCNA Discovery Learning Guide

Designing and Supporting Computer Networks, CCNA Discovery Learning Guide

1587132125

Summary

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