CompTIA Network+ Review Guide – Exam – N10–008 5e

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.

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