CompTIA Network+ (N10-009) Certification Companion

This book is a comprehensive and approachable guide designed to help learners master the skills required for the CompTIA Network+ (N10-009) exam and succeed in real-world networking roles. Authored with clarity and structured for progressive learning, this companion serves as both a study tool and a practical foundation for IT professionals.

It begins by introducing the purpose and value of the Network+ certification, emphasizing its vendor-neutral advantage and relevance to diverse IT environments. Readers are encouraged with clear career pathways and strategic study practices, including lab work, flashcards, and structured reviews. Each chapter methodically breaks down one of the core domains of the certification exam.

Topics include fundamental networking concepts, network implementations, operations, security, and troubleshooting. Learners are also guided through IP addressing, routing, and the protocols that power both wired and wireless communications. Rich visual diagrams―such as the TCP/IP model and certification flowcharts―enhance understanding of complex ideas.

Later chapters cover network services like DNS, DHCP, and NTP, before diving into advanced concepts like subnetting, routing protocols, and NAT. The final chapter explores emerging technologies including Software Defined Networking (SDN), Network Function Virtualization (NFV), Internet of Things (IoT) systems, and 5G wireless evolution.

What You Will Learn:

• Summaries, exam tips, and real-world context to reinforce knowledge and boost exam readiness.
• The technical skills and the confidence needed to succeed in IT networking roles.
• Networking fundamentals, including components, networking models, and common protocols and ports
• Network implementations, including types and standards
• Network operations, including documentation, change management, disaster recovery planning, and network monitoring
• Network security, including common security threats and vulnerabilities, authentication methods and encryption, and network hardening techniques

Who this book is for:

All readers curious to learn more about the IT field, specifically those looking towards Networking or the CompTIA Network+ certification.

Kodi Cochran is highly invested in the field of cybersecurity, something he has followed as a hobbyist for the past decade and expanded to make it his field of study and work. He has a Bachelors and Masters in Cybersecurity and Information Assurance, in addition to working as an Information Systems Manager for the Networking and Infrastructure team of the Department of Human and Health Resources under the agency of the Office of Management of Information Services at the state of West Virginia. 

He’s responsible for networking administration, project management, system support, and site support for the state of West Virginia in all state-owned health care facilities, hospitals, and labs. In addition, Kodi holds the following certifications: CompTIA A+, Network+, Security+, Project+, CySA+, and Pentest+. He’s currently working on the CompTIA CASP+.