CompTIA Network+ Certification All-in-One Exam Guide PDF

 All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio i ALL IN ONE CompTIA Network+...

 All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio i ALL IN ONE CompTIA Network+ ™ Certification EXAM GUIDE Eighth Edition (Exam N10-008) 00-FM.indd 1 06/12/21 3:32 PM  BeginNew-Tight5.5 / Java: A Beginner’s Guide, Ninth Edition / Herbert Schildt / 355-9 / Front Matter Blind Folio: xxiv This page intentionally left blank 00-FM.indd 24 12/11/21 9:20 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio iii ALL IN ONE CompTIA Network+ ™ Certification EXAM GUIDE Eighth Edition (Exam N10-008) Mike Meyers, Series Editor Scott Jernigan New York Chicago San Francisco Athens London Madrid Mexico City Milan New Delhi Singapore Sydney Toronto McGraw Hill is an independent entity from CompTIA® and is not affiliated with CompTIA in any manner. This publication and accompanying media may be used in assisting students to prepare for the CompTIA Network+™ exam. Neither CompTIA nor McGraw Hill warrants that use of this publication and accompanying media will ensure passing any exam. CompTIA and CompTIA Network+ are trademarks or registered trademarks of CompTIA in the United States and/or other countries. All other trademarks are trademarks of their respective owners. The CompTIA Marks are the proprietary trademarks and/or service marks of CompTIA and its affiliates used under license from CompTIA. 00-FM.indd 3 06/12/21 3:32 PM Copyright © 2022 by McGraw Hill. All rights reserved. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval sys- tem, without the prior written permission of the publisher, with the exception that the program listings may be entered, stored, and executed in a computer system, but they may not be reproduced for publication. 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McGraw-Hill Education has no responsibility for the content of any information ac- cessed through the work. Under no circumstances shall McGraw-Hill Education and/or its licensors be liable for any indirect, incidental, special, punitive, consequential or similar damages that result from the use of or inability to use the work, even if any of them has been advised of the possibility of such damages. This limitation of liability shall apply to any claim or cause whatsoever whether such claim or cause arises in contract, tort or otherwise.  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio v To my parents, Drs. Kenneth and Eileen Reamy. Thank you for gifting the love of words. 00-FM.indd 5 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio vi ABOUT THE SERIES EDITOR Michael Meyers is the industry’s leading authority on CompTIA Network+ certification. He is the president and founder of Total Seminars, LLC, a member of CompTIA, and a major provider of IT fundamentals, PC and network repair, and computer security training and training materials for thousands of organizations throughout the world. Mike has written numerous popular textbooks, including the best-selling Mike Meyers’ CompTIA A+™ Guide to Managing and Troubleshooting PCs, Mike Meyers’ CompTIA Network+™ Guide to Managing and Troubleshooting Networks, and Mike Meyers’ CompTIA Security+™ Certification Guide. Mike has attained numerous industry certifications, including CompTIA A+, CompTIA Network+, CompTIA Security+, CompTIA Cybersecurity Analyst (CySA+), and Microsoft Certified Professional. About the Author Scott Jernigan wields a mighty red pen as Editor in Chief for Total Seminars. With a Master of Arts degree in Medieval History, Scott feels as much at home in the musty archives of London as he does in the crisp IPS glow of Total Seminars’ Houston HQ. After fleeing a purely academic life, he dove headfirst into IT, working as an instructor, editor, and writer. Scott has written, edited, and contributed to dozens of books on computer literacy, hardware, operating systems, networking, security, and certification, including Computer Literacy—Your Ticket to IC3 Certification, and co-authoring with Mike Meyers the Comp- TIA IT Fundamentals+™ All-in-One Exam Guide and Mike Meyers’ CompTIA Security+™ Certification Guide. Scott has taught computer classes all over the United States, including stints at the United Nations in New York and the FBI Academy in Quantico. Practicing what he preaches, Scott is a CompTIA ITF+, CompTIA A+, CompTIA Network+, and Comp- TIA Security+ certified technician, a Microsoft Certified Professional, a Microsoft Office User Specialist, and Certiport Internet and Computing Core Certified. About the Technical Editor Jonathan S. Weissman is a senior lecturer (Department of Computing Security) at Rochester Institute of Technology, where he was awarded the RIT Outstanding Teaching Award in 2014, the RIT GCCIS Outstanding Educator Award in 2018, and the RIT Distinguished Teacher Recognition Program Honors in 2019. Jonathan teaches three courses that he developed for the edX RITx Cybersecurity MicroMasters program to more than 300,000 students worldwide. 00-FM.indd 6 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM / Blind Folio vii Jonathan is also a tenured associate professor and the Networking and Cybersecurity program coordinator (Department of Computing Sciences) at Finger Lakes Community College, where he was awarded the State University of New York Chancellor’s Award for Excellence in Teaching in 2021. Jonathan has a master’s degree in Computer Science from Brooklyn College and holds 44 industry certifications, including CCNP Enter- prise, Cisco Certified Specialist – Enterprise Core, Cisco Certified Specialist – Enter- prise Advanced Infrastructure Implementation, CCNA Security, CCNA, CompTIA Security+, CompTIA Network+, CompTIA A+, CompTIA Linux+, CompTIA Server+, EC-Council Certified Ethical Hacker™, EC-Council Computer Hacking Forensic Inves- tigator™, and IPv6 Forum Certified Network Engineer (Gold), among many others. Jonathan is the coauthor of Mike Meyers’ CompTIA Network+™ Guide to Managing and Troubleshooting Networks Lab Manual (fifth and sixth editions) and Mike Meyers’ CompTIA Network+™ Certification Passport (sixth and seventh editions). He also serves as technical editor for many industry textbooks. Follow Jonathan on LinkedIn at www.linkedin.com/in/jonathan-s-weissman- 058b649b, Twitter at https://twitter.com/CSCPROF, and Instagram at www.instagram. com/cscprof. Subscribe to his YouTube channel athttps://youtube.com/weissman52. 00-FM.indd 7 06/12/21 3:32 PM  BeginNew-Tight5.5 / Java: A Beginner’s Guide, Ninth Edition / Herbert Schildt / 355-9 / Front Matter Blind Folio: xxiv This page intentionally left blank 00-FM.indd 24 12/11/21 9:20 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CONTENTS AT A GLANCE Chapter 1 Network Models...................................................................................................... 1 Chapter 2 Cabling and Topology......................................................................................... 43 Chapter 3 Ethernet Basics...................................................................................................... 67 Chapter 4 Ethernet Standards............................................................................................... 91 Chapter 5 Installing a Physical Network........................................................................ 111 Chapter 6 TCP/IP Basics....................................................................................................... 171 Chapter 7 Routing.................................................................................................................. 231 Chapter 8 TCP/IP Applications......................................................................................... 281 Chapter 9 Network Naming............................................................................................... 317 Chapter 10 Securing TCP/IP.................................................................................................. 353 Chapter 11 Switch Features.................................................................................................. 395 Chapter 12 IPv6........................................................................................................................ 425 Chapter 13 WAN Connectivity............................................................................................. 449 Chapter 14 Wireless Networking........................................................................................ 483 Chapter 15 Virtualization and Cloud Computing......................................................... 541 Chapter 16 Data Centers....................................................................................................... 581 Chapter 17 Integrating Network Devices........................................................................ 605 Chapter 18 Network Operations......................................................................................... 629 Chapter 19 Protecting Your Network................................................................................. 655 Chapter 20 Network Monitoring........................................................................................ 707 Chapter 21 Network Troubleshooting............................................................................. 731 Appendix A Exam Objective Map........................................................................................ 777 Appendix B Create Your Study Plan.................................................................................... 799 Appendix C About the Online Content............................................................................. 801 Glossary................................................................................................................ 805 Index....................................................................................................................... 893 ix 00-FM.indd 9 06/12/21 3:32 PM  BeginNew-Tight5.5 / Java: A Beginner’s Guide, Ninth Edition / Herbert Schildt / 355-9 / Front Matter Blind Folio: xxiv This page intentionally left blank 00-FM.indd 24 12/11/21 9:20 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CONTENTS Acknowledgments.......................................................................... xxiii Introduction.................................................................................. xxv Chapter 1 Network Models................................................................................... 1 Historical/Conceptual.................................................................... 2 Working with Models............................................................. 2 Biography of a Model................................................................... 2 Network Models........................................................................... 3 The OSI Seven-Layer Model on a Simple Network................. 4 Welcome to MHTechEd!...................................................... 5 Test Specific........................................................................... 6 Let’s Get Physical—Network Hardware and Layers 1–2.... 6 Beyond the Single Wire—Network Software and Layers 3–7. 21 The OSI Seven-Layer Model and Remote Work. 35 Chapter Review. 39 Questions. 39 Answers. 40 Chapter 2 Cabling and Topology. Test Specific. 43 44 Network Topologies. 44 Bus and Ring. 44 Star. 46 Hybrid. 47 Mesh. 48 Parameters of a Topology. 49 Cabling and Connectors. 50 Copper Cabling and Connectors. 50 Fiber-Optic Cabling and Connectors................... 59 Fire Ratings. 63 Networking Industry Standards—IEEE. 63 Chapter Review. 65 Questions. 65 Answers. 66 xi 00-FM.indd 11 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xii Chapter 3 Ethernet Basics............................................................................................ 67 Historical/Conceptual. 68 Ethernet. 68 802.3 Standards. 68 Test Specific. 69 Ethernet Frames. 69 Early Ethernet Standards. 71 Bus Ethernet. 71 10BASE-T. 72 10BASE-FL. 76 CSMA/CD. 79 Enhancing and Extending Ethernet Networks. 81 The Trouble with Hubs. 81 Switches to the Rescue. 81 Connecting Ethernet Segments. 84 Troubleshooting Switches. 87 Chapter Review. 87 Questions. 87 Answers. 89 Chapter 4 Ethernet Standards. Test Specific.................................................................................. 91 91 100-Megabit Ethernet.................................................................... 91 100BASE-T................................................................................... 92 100BASE-FX..................................... 94 100BASE-SX................................................................................. 95 Full-Duplex Ethernet..................................................................... 95 Gigabit Ethernet............................................................................ 97 1000BASE-SX............................................................................... 97 1000BASE-LX............................................................................. 98 SFF Fiber Connectors................................................................... 98 Mechanical Connection Variations............................................... 99 Implementing Multiple Types of Gigabit Ethernet......................... 99 Ethernet Evolutions...................................................................... 100 10 Gigabit Ethernet. 100 Chapter Review. 107 Questions. 107 Answers. 109 Chapter 5 Installing a Physical Network. Historical/Conceptual. 111 113 Understanding Structured Cabling. 113 Cable Basics—A Star Is Born. 114 00-FM.indd 12 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM Contents xiii Test Specific.................................................................................. 115 Structured Cable—Network Components..................................... 115 Structured Cable—Beyond the Star............................................... 130 Installing Structured Cabling........................................................ 134 Getting a Floor Plan............................................................ 134 Mapping the Runs................................................................ 135 Determining the Location of the Telecommunications Room. 136 Pulling Cable. 137 Making Connections. 141 Testing the Cable Runs. 148 NICs. 157 Buying NICs. 158 Link Lights. 160 Diagnostics and Repair of Physical Cabling. 162 Diagnosing Physical Problems. 162 Check Your Lights. 162 Check the NIC. 163 Cable Testing. 164 Problems in the Telecommunications Room. 165 Toners. 166 Chapter Review. 168 Questions. 168 Answers. 170 Chapter 6 TCP/IP Basics. Historical/Conceptual. 171 172 Test Specific. 172 The TCP/IP Protocol Suite. 172 Network Layer Protocols. 173 Transport Layer Protocols. 174 Application Layer Protocols. 176 IP and Ethernet. 177 IP Addresses. 181 IP Addresses in Action. 188 Class IDs. 197 CIDR and Subnetting. 199 Subnetting. 199 CIDR: Key Takeaways. 209 IP Address Assignment. 209 Static IP Addressing. 210 Dynamic IP Addressing. 214 Special IP Addresses. 227 00-FM.indd 13 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xiv Chapter Review. 228 Questions. 228 Answers. 229 Chapter 7 Routing. Historical/Conceptual. 231 232 How Routers Work. 232 Test Specific. 234 Routing Tables. 234 Freedom from Layer 2. 243 Network Address Translation. 244 Dynamic Routing. 250 Routing Metrics. 251 Distance Vector and Path Vector. 253 Link State. 260 EIGRP. 261 Dynamic Routing Makes the Internet. 262 Route Redistribution and Administrative Distance. 262 Working with Routers. 263 Connecting to Routers. 263 Basic Router Configuration. 271 Router Problems. 273 Chapter Review. 277 Questions. 277 Answers. 279 Chapter 8 TCP/IP Applications. Historical/Conceptual. 281 282 Transport Layer and Network Layer Protocols. 282 How People Communicate. 282 Test Specific. 283 TCP. 283 UDP. 284 ICMP. 286 IGMP. 288 The Power of Port Numbers. 288 Registered Ports. 291 Connection Status. 294 Rules for Determining Good vs. Bad Communications. 296 Common TCP/IP Applications. 297 Telnet and SSH. 297 E-mail. 299 SQL. 304 FTP. 305 HTTP and HTTPS................................ 307 TCP/IP Applications Chart. 311 00-FM.indd 14 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM Contents xv Beyond Network+. 312 Other Layer 7 Applications. 312 Chapter Review. 314 Questions. 314 Answers. 315 Chapter 9 Network Naming. Historical/Conceptual. 317 318 Before DNS. 318 NetBIOS. 318 hosts. 320 Test Specific. 321 DNS. 321 How DNS Works. 321 Administering DNS Servers. 333 Troubleshooting DNS on Clients. 343 Diagnosing TCP/IP Network Issues. 347 Chapter Review. 350 Questions. 350 Answers. 351 Chapter 10 Securing TCP/IP. Historical/Conceptual. 353 354 Making TCP/IP Secure. 354 Encryption. 354 Integrity. 361 Nonrepudiation. 365 Test Specific. 370 Authentication.................................... 370 Authorization. 371 TCP/IP Security Standards. 372 User Authentication Standards. 373 Encryption Standards. 380 Combining Authentication and Encryption. 385 Secure TCP/IP Applications. 387 HTTPS. 387 Securing E-Mail Protocols. 388 SCP. 389 SFTP. 389 SNMP. 390 LDAP. 391 NTP. 391 Chapter Review. 391 Questions. 391 Answers. 393 00-FM.indd 15 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xvi Chapter 11 Switch Features............................................................................................ 395 Test Specific. 396 Switch Management. 396 Access Management. 397 Port Configuration. 398 Port Security. 399 Virtual LANs. 400 Trunking. 401 Configuring a VLAN-Capable Switch. 402 Assigning VLANs and Tagging. 405 VLAN Trunking Protocol. 406 Inter-VLAN Routing. 407 DHCP and VLANs. 408 Voice VLANs. 409 Private VLANs. 409 Troubleshooting VLANs. 409 Multilayer Switches. 409 Load Balancing. 410 QoS and Traffic Shaping. 413 Port Bonding. 414 Network Protection. 414 Chapter Review. 421 Questions. 421 Answers. 423 Chapter 12 IPv6. Test Specific. 425 426 IPv6 Concepts......................................... 426 IPv6 Addresses. 426 Neighbor Discovery. 432 IPv6 Implementations. 434 Stateless Address Autoconfiguration (SLAAC). 434 Aggregation. 438 IPv6 and DNS.................................... 441 Moving to IPv6. 442 IPv4 and IPv6. 442 Transition Mechanisms. 444 Chapter Review. 446 Questions. 446 Answers. 448 Chapter 13 WAN Connectivity. Historical/Conceptual. 449 450 WAN Technologies. 450 SONET. 451 00-FM.indd 16 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM Contents xvii Test Specific.................................................................................. 451 Fiber Improvements. 451 Private WANs. 452 Last-Mile Technologies. 456 DSL. 456 Broadband Cable. 459 Satellite. 460 Fiber. 461 Cellular WAN. 461 Which Connection?. 465 Remote Access......................................... 466 Remote Terminal. 466 Virtual Private Networks. 470 WAN Troubleshooting Scenarios. 477 Loss of Internet Connectivity. 477 Interface Errors. 477 DNS Issues. 478 Interference. 478 Chapter Review. 480 Questions. 480 Answers. 481 Chapter 14 Wireless Networking. Historical/Conceptual. 483 483 Test Specific. 484 Wi-Fi Standards. 484 802.11. 485 802.11b. 493 802.11a. 494 802.11g. 494 802.11n. 495 802.11ac. 496 802.11ax. 496 WPS. 497 Wi-Fi Security. 497 Enterprise Wireless. 505 Implementing Wi-Fi. 509 Performing a Site Survey. 509 Installing the Client. 513 Setting Up an Ad Hoc Network. 514 Setting Up an Infrastructure Network. 515 Extending the Network. 527 Verifying the Installation. 528 00-FM.indd 17 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xviii Troubleshooting Wi-Fi. 528 No Connection. 528 Slow Connection. 532 Weird Connection. 535 Chapter Review. 537 Questions. 537 Answers. 539 Chapter 15 Virtualization and Cloud Computing. Test Specific. 541 542 Virtualization and Cloud Computing Concepts. 542 Virtualization. 542 Cloud Computing. 548 Infrastructure as Code. 554 Virtual Networking. 556 Putting Network Virtualization and Cloud Computing to Work... 563 Setting Up Rocket.Chat in a Local Hypervisor. 564 Managing Cloud Resources. 569 Setting Up Rocket.Chat on IaaS. 571 Desktop as a Service. 574 Interconnecting Local and Cloud Resources. 576 Chapter Review. 578 Questions. 578 Answers. 580 Chapter 16 Data Centers. Test Specific. 581 582 Classic Data Center Architecture and Design. 582 Tiers. 583 Traffic Flows. 585 Data Storage. 587 Where Is the Classic Data Center?. 589 The Modern Data Center. 589 Virtualization. 589 Software-Defined Networking. 590 Spine and Leaf. 590 High Availability in the Data Center. 591 Load Balancing. 591 Redundancy. 592 Facilities and Infrastructure Support. 593 Documenting the Data Center. 594 Network Diagrams. 595 Baseline Configurations. 600 Assessments. 600 00-FM.indd 18 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM Contents xix Chapter Review. 602 Questions. 602 Answers. 604 Chapter 17 Integrating Network Devices. Test Specific. 605 607 Internet of Things. 607 IoT Home Automation. 607 IoT Home Security. 609 IoT Communications Technologies. 610 Hardening IoT Devices. 612 Unified Communication. 613 It Started with VoIP. 613 Unified Communication Features. 614 VTC and Medianets. 617 UCaaS. 618 ICS. 619 DCS. 620 PLC. 623 SCADA. 623 Chapter Review. 625 Questions. 625 Answers. 627 Chapter 18 Network Operations. Test Specific. 629 629 Risk Management. 629 Hardening and Security Policies. 630 Change Management. 634 Patching and Updates. 636 Training. 638 Common Agreements. 639 Security Preparedness. 640 Contingency Planning. 645 Incident Response. 645 Disaster Recovery. 646 Business Continuity. 647 Forensics. 648 Chapter Review. 651 Questions. 651 Answers. 653 00-FM.indd 19 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xx Chapter 19 Protecting Your Network.......................................................................... 655 Test Specific. 655 Security Concepts. 655 CIA. 656 Zero Trust. 657 Defense in Depth. 657 Separation of Duties. 658 Network Threats. 658 Threat Terminology. 659 Spoofing. 660 Packet/Protocol Abuse. 660 Zero-Day Attacks. 661 Rogue Devices. 662 ARP Cache Poisoning. 662 Denial of Service. 666 On-Path Attack. 668 Session Hijacking. 669 Password Attacks. 669 Physical/Local Access. 669 Malware. 672 Social Engineering. 674 Common Vulnerabilities. 677 Unnecessary Running Services. 677 Unpatched/Legacy Systems. 679 Unencrypted Channels. 679 Cleartext Credentials. 679 RF Emanation. 680 Hardening Your Network. 680 Physical Security. 680 Network Security. 685 Device Hardening. 692 Host Security. 693 Firewalls. 697 Types of Firewalls. 697 Implementing and Configuring Firewalls. 699 Troubleshooting Firewalls. 702 Chapter Review. 703 Questions. 703 Answers. 705 Chapter 20 Network Monitoring. Test Specific.................................................................................. 707 708 SNMP.......................................................................................... 708 00-FM.indd 20 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM Contents xxi Monitoring Tools. 712 Packet Sniffers. 713 Protocol Analyzers. 713 Sensors. 718 Interface Monitors. 719 Performance Monitors. 720 Putting It All Together. 722 Scenario: Monitoring and Managing. 722 SIEM. 726 Chapter Review. 727 Questions. 727 Answers. 729 Chapter 21 Network Troubleshooting. Test Specific.................................................................................. 731 732 Troubleshooting Tools.................................................................... 732 Hardware Tools............................................................................. 732 Software Tools............................................................................... 738 The Troubleshooting Process.......................................................... 750 Identify the Problem............................................................ 751 Establish a Theory of Probable Cause.................................. 753 Test the Theory to Determine the Cause.............................. 754 Establish a Plan of Action and Identify Potential Effects.... 754 Implement the Solution or Escalate as Necessary.................. 755 Verify Full System Functionality and Implement Preventive Measures........................................................ 756 Document Findings, Actions, Outcomes, and Lessons Learned. 756 Resolving Common Network Service Issues. 757 “We Can’t Access Our Web Server in Istanbul!”. 757 Network Troubleshooting Considerations. 759 Hands-On Problems. 760 Nearby Problems. 763 Far-flung Problems. 769 Network Performance Issues. 772 Troubleshooting Is Fun!. 773 Chapter Review. 773 Questions. 773 Answers. 775 Appendix A Exam Objective Map. 777 Exam N10-008. 777 00-FM.indd 21 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xxii Appendix B Create Your Study Plan. 799 Review Your Overall Score. 799 Review Your Score by CompTIA Network+ Exam Domain. 800 Appendix C About the Online Content. 801 System Requirements. 801 Your Total Seminars Training Hub Account. 801 Privacy Notice. 802 Single User License Terms and Conditions. 802 TotalTester Online. 803 Pre-Assessment. 803 Create Your Study Plan. 804 Playing the CompTIA Network+ Introduction Video. 804 Mike’s CompTIA Network+ Video Training Sample. 804 TotalSims Sample for CompTIA Network+. 804 Mike’s Cool Tools. 804 Technical Support. 804 Glossary. 805 Index............................................................................................ 893 00-FM.indd 22 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM ACKNOWLEDGMENTS I’d like to acknowledge the many people who contributed their talents to make this book possible: To Tim Green, my acquisitions editor at McGraw Hill: Your encouragement and support during our pandemic edition kept the sanity in place. Love working with you! To my Series Editor, Mike Meyers: I couldn’t have done it without you, amigo. Truthfully, has there ever been a better combo than a wizard and a paladin? To Jonathan S. Weissman, technical editor: Great fun working with you on another book. Thanks for keeping me on my toes and technically on point! To Bill McManus, copy editor: I would say that “people say” you’re the best in the business, but that people is me. Love working with you! To Travis Everett, writer and editor: Hand in glove on this one, Travis. Love your words and the meticulous attention to nuances that I missed. Great working with you and look forward to more. Qatar next winter? To Michael Smyer, technologist and photographer: Enjoyed the process on this book, my friend. Yes, even the arguments, because they made the final product much better than anything I could have done on my own. To Dave Rush, senior instructor and top researcher: Thank you for everything you contributed to this book, from research to sounding board to more research.... No idea how you can know so much about so much, but I’m very happy you’re on my team! To Andrew Hutz, security specialist and wordsmith: Awesome having you on board for this project! Great writing and editing! I look forward to many more with you. To Dudley Lehmer, CEO of Total Seminars: Thanks for keeping the ship afloat while I got to play on this book! You are awesome. To Emily Walters, acquisitions coordinator at McGraw Hill: What a joy to share this project with you! Thanks for keeping us moving and filling in pieces. Good luck with that epic cat and…surf ’s up! To Rachel Fogelberg, project editor: So fun to work with you! (I hope I didn’t add any gray hair with my chronic lateness.) Let’s do another one soon. To Janet Walden, editorial supervisor: Thanks for jumping in and donning several hats during vacations and the like. Always enjoy working with you! To Paul Tyler, proofreader: You picked up some great stuff, amigo. This was a new process for us where we got to see your edits and suggestions before we did our own proof. Wow! Thank you. To the KGL compositors and illustrators: The layout was excellent, thanks! And thanks for pushing through at crunch time, too. xxiii 00-FM.indd 23 06/12/21 3:32 PM  BeginNew-Tight5.5 / Java: A Beginner’s Guide, Ninth Edition / Herbert Schildt / 355-9 / Front Matter Blind Folio: xxiv This page intentionally left blank 00-FM.indd 24 12/11/21 9:20 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM INTRODUCTION By picking up this book, you’ve shown an interest in learning about networking. But be forewarned. The term networking describes a vast field of study, far too large for any single certification, book, or training course to cover. Do you want to configure rout- ers and switches for a living? Do you want to administer a large Windows network at a company? Do you want to install wide area network connections? Do you want to set up Web servers? Do you want to secure networks against attacks? If you’re considering a CompTIA Network+ certification, you probably don’t yet know exactly what aspect of networking you want to pursue, and that’s okay! You’re going to love preparing for the CompTIA Network+ certification. Attaining CompTIA Network+ certification provides you with four fantastic benefits. First, you get a superb overview of networking that helps you decide what part of the industry you’d like to pursue. Second, it acts as a prerequisite toward other, more advanced certifications. Third, the amount of eye-opening information you’ll gain just makes getting CompTIA Network+ certified plain old fun. Finally, you’ll significantly enhance your opportunity to get a job. Everything is networked today, putting network techs in demand. Nothing comes close to providing a better overview of networking than CompTIA Network+. The certification covers local area networks (LANs), wide area networks (WANs), the Internet (the world’s largest WAN), security, cabling, and applications in a wide-but-not-too-deep fashion that showcases the many different parts of a network and hopefully tempts you to investigate the aspects that intrigue you by looking into follow-up certifications. The process of attaining CompTIA Network+ certification will give you a solid foundation in the whole field of networking. Mastering the competencies will help fill in gaps in your knowledge and provide an ongoing series of “a-ha!” moments of grasping the big picture that make being a tech so much fun. Ready to learn a lot, grab a great certification, and have fun doing it? Then welcome to CompTIA Network+ certification! Who Needs CompTIA Network+? I Just Want to Learn about Networks! Whoa there, amigo! Are you one of those folks who either has never heard of the Comp- TIA Network+ exam or just doesn’t have any real interest in certification? Is your goal only to get a solid handle on networks and a jump start on the basics? Are you looking for that “magic bullet” book that you can read from beginning to end and then start installing and troubleshooting a network? Do you want to know what’s involved with running network cabling in your walls or getting your new wireless network working? Are you tired of not xxv 00-FM.indd 25 06/12/21 3:32 PM  All-In-One / CompTIA Network+™ Certification All-in-One Exam Guide / Meyers & Jernigan / 905-6 / FM CompTIA Network+ Certification All-in-One Exam Guide xxvi knowing enough about TCP/IP and how it works? If these types of questions are running through your mind, then rest easy—you have the right book. Like every book with the Mike Meyers name, you’ll get solid concepts without pedantic details or broad, meaning- less overviews. You’ll look at real-world networking as performed by real techs. This is a book that understands your needs and goes well beyond the scope of a single certification. If the CompTIA Network+ exam isn’t for you, you can skip the rest of this introduc- tion, shift your brain into learn mode, and dive into Chapter 1. But then, if you’re going to have the knowledge, why not get the certification? What Is CompTIA Network+ Certification? CompTIA Network+ certification is an industry-wide, vendor-neutral certification pro- gram developed and sponsored by the Computing Technology Industry Association (CompTIA). The CompTIA Network+ certification shows that you have a basic com- petency in the physical support of networking systems and knowledge of the conceptual aspects of networking. To date, many hundreds of thousands of technicians have become CompTIA Network+ certified. CompTIA Network+ certification enjoys wide recognition throughout the IT indus- try. It is considered the obvious next step after CompTIA A+ certification. (CompTIA A+ is the certification for PC technicians.) What Is CompTIA? CompTIA is a nonprofit, industry trade association based in Oakbrook Terrace, Illi- nois, on the outskirts of Chicago. Tens of thousands of computer resellers, value-added resellers, distributors, manufacturers, and training companies from all over the world are members of CompTIA. CompTIA was founded in 1982. The following year, CompTIA began offering the CompTIA A+ certification exam. CompTIA A+ certification is now widely recognized as the de facto requirement for entrance into the PC industry. Because the CompTIA A+ exam initially covered networking only lightly, CompTIA decided to establish a vendor- neutral test covering basic networking skills. So, in April 1999, CompTIA unveiled the CompTIA Network+ certification exam. CompTIA provides certifications for a variety of areas in the computer industry, offers opportuniti