Certification · CompTIA Network+ · Released October 2026

CompTIA Network+ Study Guide by Kai London

This study guide takes you through the knowledge CompTIA Network+ expects, area by area, in clear language — with worked examples, exam tips and practice questions so you can check your progress as you go.

What the book covers

Networking concepts

Models, protocols, addressing and topologies.

Network implementation

Switching, routing, wireless and cabling.

Network operations

Monitoring, documentation and resilience.

Network security

Hardening, access control and common attacks.

Troubleshooting

A structured method for network problems.

Practice and review

End-of-chapter questions with explanations, plus a final review checklist.

This is an independent study aid. It is not affiliated with, sponsored or endorsed by CompTIA; exam names are trademarks of their owners. Always check the current official exam outline.

Network+NetworkingCertificationTroubleshooting

Who it is for

Network+ candidates, IT support staff and junior network administrators.

About the author

Professor Kai London — CISSP, CISM.

An internationally recognised cybersecurity executive, board advisor and Founder & CEO of Quantum AI Systems Security LLC, writing at the convergence of AI, governance and operational resilience. Honorary Professor and Researcher at UCL.