CompTIA Network+ Review Guide
Description
Prep for success on the Network+ N10-008 exam and for your new career in network administration with this must-have resource
In the newly updated Fifth Edition of the CompTIA Network+ Review Guide: Exam: N10-008, a leading expert in Network Operations, Jon Buhagiar, delivers a focused and concise handbook for anyone preparing for the new Network+ N10-008 exam or for a career in network administration.
This guide is organized into five parts, with each part corresponding to one of the 5 objective domain areas of the Network+ exam: Fundamentals, Implementations, Operations, Security, and Troubleshooting.
You'll handily learn crucial IT skills like designing and implementing functional networks, configuring and managing essential network devices, using switches and routers to segment network traffic, and securing existing networks. This book also allows you to:
- Quickly and comprehensively prepare for the Network+ N10-008 exam with intuitively organized info and efficient learning strategies
- Discover the skills and techniques required in an entry-level network administration interview and job
- Access the Sybex online learning center, with chapter review questions, full-length practice exams, hundreds of electronic flashcards, and a glossary of key terms
Perfect as a standalone resource for those seeking to succeed on the CompTIA Network+ N10-008 exam or as a companion to the CompTIA Network+ Study Guide and CompTIA Network+ Deluxe Study Guide, this book is an indispensable reference for anyone preparing for a career in network administration, network analysis, or systems engineering.
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ABOUT THE AUTHOR
Jon Buhagiar, Network+, A+, CCNA, MCSA, MCSE, BS/ITM, is Supervisor of Network Operations at Pittsburgh Technical College. In addition to teaching, he has been creating course content for the past 20 years. Some of his more recent work can be found on YouTube http://www.youtube.com/networkedminds.
Content
Introduction xvii
Chapter 1 Domain 1.0: Networking Fundamentals 1
1.1 Compare and contrast the Open Systems Interconnection (OSI) model layers and encapsulation concepts 11
OSI Model 12
Protocol Data Units 21
Data Encapsulation and Decapsulation 22
Exam Essentials 26
1.2 Explain the characteristics of network topologies and network types 28
Wired Topologies 28
Types 33
Service- Related Entry Point 39
Virtualization 40
Virtual Networking Components 40
Service Type 43
Service Delivery 48
Exam Essentials 50
1.3 Summarize the types of cables and connectors and explain which is the appropriate type for a solution 51
Media Types 51
Connector Types 55
Transceivers 60
Media Converters 62
Characteristics of Fiber Transceivers 63
Termination Points 65
Copper Cabling Standards 70
Copper Termination Standards 73
Ethernet Deployment Standards 76
Exam Essentials 78
1.4 Given a scenario, configure a subnet and use appropriate IP addressing schemes 80
Private vs. Public 80
Nat/pat 81
IPv4 Concepts 84
IPv6 Concepts 88
Address Assignments 93
Subnetting 99
Virtual IP (VIP) 107
Exam Essentials 108
1.5 Explain common ports and protocols, their application, and encrypted alternatives 110
Protocols and Ports 110
IP Protocol Types 117
Connection- Oriented vs. Connectionless 121
Exam Essentials 122
1.6 Explain the use and purpose of network services 123
Dns 123
DHCP Service 132
Ntp 137
Exam Essentials 137
1.7 Explain basic corporate and datacenter network architecture 139
Three- Tiered Model 139
Software- Defined Networking 140
Spine and Leaf 142
Traffic Flows 143
Host Locations 144
Network Storage Types 145
Connection Type 147
Exam Essentials 150
1.8 Summarize cloud concepts and connectivity options 151
Characteristics of a Cloud 151
Cloud Delivery Models 152
Types of Services 155
Infrastructure as Code 157
Connectivity Methods 160
Multitenancy 161
Elasticity 161
Scalability 162
Security Implications/Considerations 162
Relationship Between Local and Cloud Resources 163
Exam Essentials 163
Review Questions 165
Chapter 2 Domain 2.0: Network Implementations 169
2.1 Compare and contrast various devices, their features, and their appropriate placement on the network 173
Network Devices 173
Exam Essentials 203
2.2 Compare and contrast routing technologies and bandwidth management concepts 204
Routing 204
Bandwidth Management 212
Exam Essentials 215
2.3 Given a scenario, configure and deploy common Ethernet switching features 216
Characteristics of Ethernet and IP Communications 216
Basic Switch Functions 220
Segmentation and Interface Properties 227
Switching Features 231
Exam Essentials 234
2.4 Given a scenario, install and configure the appropriate wireless standards and technologies 235
802.11 Standards 235
Frequencies 238
Wireless Considerations 239
Wireless Modes of Operation 245
Wireless Security 248
Cellular 252
Exam Essentials 254
Review Questions 256
Chapter 3 Domain 3.0: Network Operations 261
3.1 Given a scenario, use the appropriate statistics and sensors to ensure network availability 265
Performance Metrics 265
Snmp 270
Network Device Logs 274
Interface Statistics/Status 279
Interface Errors or Alerts 286
Environmental Factors and Sensors 289
Performance Baselines 291
NetFlow Data 292
Uptime/Downtime 293
Exam Essentials 294
3.2 Explain the purpose of organizational documents and policies 296
Plans and Procedures 296
Hardening and Security Policies 303
Common Documentation 307
Common Agreements 315
Exam Essentials 316
3.3 Explain high availability and disaster recovery concepts and summarize which is the best solution 318
Load Balancing 318
Multipathing 318
Network Interface Card (NIC) Teaming 320
Redundant Hardware/Clusters 320
Facilities and Infrastructure Support 326
Redundancy and High Availability (HA) Concepts 330
Backups 334
Exam Essentials 336
Review Questions 338
Chapter 4 Domain 4.0: Network Security 343
4.1 Explain common security concepts 348
Confidentiality, Integrity, Availability (CIA) 348
Threats 349
Vulnerabilities 350
Exploits 351
Least Privilege 351
Role- Based Access 352
Zero Trust 352
Defense in Depth 353
Authentication Methods 357
Security Assessments 364
Security Information and Event Management (SIEM) 366
Exam Essentials 366
4.2 Compare and contrast common types of attacks 368
Technology- Based 368
Human and Environmental 378
Exam Essentials 379
4.3 Given a scenario, apply network hardening techniques 381
Best Practices 381
Wireless Security 390
IOT Considerations 395
Exam Essentials 396
4.4 Compare and contrast remote access methods and security implications 397
Vpn 397
Remote Desktop Connection 400
Remote Desktop Gateway 401
Ssh 401
Virtual Network Computing (VNC) 402
Virtual Desktop 402
Authentication and Authorization Considerations 403
In- Band vs. Out- of- Band Management 403
Exam Essentials 405
4.5 Explain the importance of physical security 406
Detection Methods 407
Prevention Methods 410
Asset Disposal 413
Exam Essentials 415
Review Questions 416
Chapter 5 Domain 5.0: Network Troubleshooting 421
5.1 Explain the network troubleshooting methodology 427
Identify the Problem 428
Establish a Theory of Probable Cause 430
Test the Theory to Determine the Cause 431
Establish a Plan of Action to Resolve the Problem and Identify Potential Effects 432
Implement the Solution or Escalate as Necessary 432
Verify Full System Functionality and, If Applicable, Implement Preventive Measures 433
Document Findings, Actions, Outcomes, and Lessons Learned 433
Exam Essentials 433
5.2 Given a scenario, troubleshoot common cable connectivity issues and select the appropriate tools 434
Specifications and Limitations 434
Cable Considerations 435
Cable Application 437
Common Issues 439
Common Tools 445
Exam Essentials 456
5.3 Given a scenario, use the appropriate network software tools and commands 458
Software Tools 458
Command- Line Tools 466
Basic Network Platform Commands 481
Exam Essentials 485
5.4 Given a scenario, troubleshoot common wireless connectivity issues 486
Specifications and Limitations 486
Considerations 489
Common Issues 493
Exam Essentials 498
5.5 Given a scenario, troubleshoot general networking issues 499
Considerations 499
Common Issues 501
Exam Essentials 530
Review Questions 532
Appendix Answers to Review Questions 537
Chapter 1: Domain 1.0: Networking Fundamentals 538
Chapter 2: Domain 2.0: Network Implementations 541
Chapter 3: Domain 3.0: Network Operations 544
Chapter 4: Domain 4.0: Network Security 547
Chapter 5: Domain 5.0: Network Troubleshooting 550
Index 553
Introduction
You may be new to the field of computer networking, or perhaps you are in pursuit of proving your knowledge and understanding of computer networking. In either case, the CompTIA Network+ certification exam is a great start to your professional development. The Network+ certification is considered by employers industry-wide to be proof of the knowledge of networking theory, skill, and systems. The Network+ certification is granted to those individuals who have attained this information and show a basic competency for meeting the needs of both personal and organizational computing environments.
The CompTIA Network+ objectives have changed with the introduction of the CompTIA Network+ N10-008 certification exam. This change in objectives and topics from the prior exam was necessary to keep up with the latest technologies used in networks today. The foundation of networking concepts has remained relatively similar, despite the introduction of more advanced technologies. This is one of the reasons the CompTIA Network+ exam is so widely valued by employers. As of this writing, the objectives are current for the Network+ N10-008 certification exam as stated by CompTIA (www.comptia.org).
What Is Network+ Certification?
The Computing Technology Industry Association (CompTIA) developed the Network+ certification to be vendor-neutral and recognized industry-wide. The Network+ certification is considered the benchmark of networking theory. Candidates who earn the Network+ certification have knowledge of the design, operation, maintenance, security, and troubleshooting of networks. Employers worldwide recognize Network+ certified individuals as having a basic vendor-agnostic networking theory that can be applied to any specific system.
The Network+ certification was originally sponsored by IT industry leaders like IBM, Microsoft, and Compaq, among others. The goal was to create a certification that would give recognition of individuals with a basic theory of networking. Today, more complex networking theory is required by employers, and Network+ has evolved into a comprehensive exam. The CompTIA Network+ Exam N10-008 tests five domains of network theory:
- Networking Fundamentals
- Network Implementations
- Network Operations
- Network Security
- Network Troubleshooting
For the latest pricing on the exam and updates to the registration procedures, go to www.vue.com. You can register online for the exam. If you have further questions about the scope of the exam or related CompTIA programs, refer to the CompTIA website at www.comptia.org.
Is This Book for You?
The CompTIA Network+ Review Guide: Exam N10-008, Fifth Edition is designed to be a complete, portable exam review guide that can be used either in conjunction with a more complete study program (such as Sybex's CompTIA Network+ Study Guide: Exam N10-008, Fifth Edition, computer-based training courseware, or a classroom/lab environment), or as an exam review for those who don't need more extensive test preparation. The goal of this book is to thoroughly cover those topics you can expect to be tested on.
Perhaps you've been working with information technologies for many years. The thought of paying lots of money for a specialized IT exam preparation course probably doesn't sound too appealing. What can they teach you that you don't already know, right? Be careful, though-many experienced network administrators have walked confidently into the test center only to walk sheepishly out of it after failing an IT exam. I've run across many of these network administrators throughout my 24 years of teaching networking. After you've finished reading this book, you should have a clear idea of how your understanding of networking technologies matches up with the expectations of the Network+ test writers.
The goal of the Review Guide series is to help Network+ candidates brush up on the subjects that they can expect to be on the Network+ exam. For complete in-depth coverage of the technologies and topics involved, I recommend CompTIA Network+ Study Guide from Sybex.
How Is This Book Organized?
This book is organized according to the official objectives' list prepared by CompTIA for the Network+ exam N10-008. The chapters correspond to the five major domains of objective and topic groupings. The exam is weighted across these five domains:
- Domain 1.0 Networking Fundamentals (24 percent)
- Domain 2.0 Network Implementations (19 percent)
- Domain 3.0 Network Operations (16 percent)
- Domain 4.0 Network Security (19 percent)
- Domain 5.0 Network Troubleshooting (22 percent)
In each chapter, the top-level exam objective from each domain is addressed in turn. This discussion also contains an Exam Essentials section. Here you are given a short list of topics that you should explore fully before taking the test. Included in the Exam Essentials are notations on key pieces of information you should have gleaned from CompTIA Network+ Review Guide: Exam N10-008, Fifth Edition. At the end of each chapter you'll find the "Review Questions" section. These questions are designed to help you gauge your mastery of the content in the chapter.
Interactive Online Learning Environment and Test Bank
The interactive online learning environment that accompanies CompTIA Network+ Review Guide: Exam N10-008, Fifth Edition provides a test bank with study tools to help you prepare for the certification exam, and it increases your chances of passing it the first time. The test bank includes the following:
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Sample Tests All of the questions in this book are provided, including the chapter review tests at the end of each chapter. In addition, there are two practice exams. Use these questions to test your knowledge of the review guide material. The online test bank runs on multiple devices.
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Flashcards Flashcard questions are provided in digital flashcard format (a question followed by a single correct answer). You can use the flashcards to reinforce your learning and prepare last minute before the exam.
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Other Study Tools A glossary of key terms from this book and their definitions is available as a fully searchable PDF.
Go to http://www.wiley.com/go/netplustestprep to register and gain access to this interactive online learning environment and test bank with study tools.
Tips for Taking the Network+ Exam
Here are some general tips for taking your exams successfully:
- Bring two forms of ID with you. One must be a photo ID, such as a driver's license. The other can be a major credit card or a passport. Both forms must include a signature.
- Arrive early at the exam center so you can relax and review your study materials, particularly tables and lists of exam-related information.
- Read the questions carefully. Don't be tempted to jump to an early conclusion. Make sure you know exactly what the question is asking.
- Don't leave any unanswered questions. Unanswered questions give you no opportunity for guessing correctly and scoring more points.
- There will be questions with multiple correct responses. When there is more than one correct answer, a message on the screen will prompt you to either "Choose two" or "Choose all that apply." Be sure to read the messages displayed so that you know how many correct answers you must choose.
- Questions needing only a single correct answer will use radio buttons for selecting an answer, whereas those needing two or more answers will use check boxes.
- When answering multiple-choice questions you're not sure about, use a process of elimination to get rid of the obviously incorrect answers first. Doing so will improve your odds if you need to make an educated guess.
- On form-based tests (nonadaptive), because the hard questions will eat up the most time, save them for last. You can move forward and backward through the exam.
- For the latest pricing on the exams and updates to the registration procedures, visit CompTIA's website at
www.comptia.org.
With so many changes over the past year, Pearson VUE has introduced a change to its testing policies and procedures with the introduction of online exams. You can now schedule and take the Network+ exam online from the comfort and safety of your home. The instructions to prepare for an online exam can be found at https://www.comptia.org/testing/testing-options/take-online-exam.
How to Contact the Publisher
Sybex welcomes feedback on all of its titles. Visit the Sybex website at www.sybex.com for book updates and additional certification information. You'll also find forms you can use to submit comments or suggestions regarding this or any other Sybex titles.
The Exam Objectives
The following are the areas (referred to as domains by CompTIA) in which you must be proficient in order to pass the Network+ exam:
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Domain 1.0: Networking Fundamentals This domain begins with the descriptions of the OSI model layers and the specific function and purpose of each layer are then covered. The domain examines the various topologies of...
