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I dedicate this book to my wife Teresa and my son Joseph. I love you both.

JAB

Id like to thank the many people who made this book possible. Thanks to: Kenyon Brown at Wiley Publishing, for giving me the opportunity to write this book. David Clark, for working with me as the developmental editor and making the entire process seamless. Wynn D. Smith and Brent Hamilton, working as the technical editors on this book to ensure I didnt miss any details. Liz Welch, for her many edits that helped make this book a polished product. And the many other people Ive never met who worked behind the scenes to make this book a success.

Jon Buhagiar, BS/ITM, MCSE, CCNA is an information technology professional with two decades of experience in higher education and the private sector.

Jon currently serves as Supervisor of Network Operations at Pittsburgh Technical College. In this role, he manages datacenter and network infrastructure operations and IT operations and is involved in strategic planning of IT projects supporting the quality of education at the college. He also serves as an adjunct instructor in the colleges School of Information Technology department, where he teaches certification courses for Microsoft and Cisco certifications. Jon has taught as an instructor for 18 years with several colleges in the Pittsburgh area, since the introduction of the Windows NT MCSE in 1998.

Jon earned his BS in Information Technology Management from Western Governors University. He also achieved an Associates in Business Management from Pittsburgh Technical College. He has recently earned his Windows Server 2012 R2 MCSE as well as Cisco CCNA Routing & Switching certification. Other certifications include CompTIA Network+, A+, and Project+.

In addition to his professional and teaching roles, he has authored CCNA Routing and Switching Practice Tests: Exam 100-105, Exam 200-105, and Exam 200-125 (Sybex, 2016). He has also served as the technical editor for the second edition of the CompTIA Cloud+ Study Guide (Sybex, 2016), CCNA Security Study Guide: Exam 210-260 (Sybex, 2018), and CCNA Cloud Complete Study Guide: Exam 210-451 and Exam 210-455 (Sybex, 2018). He has spoken at several conferences about spam and email systems. He is an active radio electronics hobbyist and has held a ham radio license for the past 16 years (KB3KGS). He experiments with electronics and has a strong focus on the Internet of Things (IoT).

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 organization computing environments.

The CompTIA Network+ objectives have changed with the introduction of the CompTIA Network+ N10-007 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 have 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+ N10-007 certification exam as stated by CompTIA (https://www.comptia.org).