Overview

The traditional ""castle-and-moat"" approach to network security is obsolete. In a world where the perimeter has dissolved due to cloud computing, remote work, and the Internet of Things, adversaries are continuously refining their methods in a perpetually evolving digital battlefield. A new, proactive approach is not just recommended-it is essential for survival in an increasingly hostile digital world. This definitive guide provides cybersecurity professionals with the vital knowledge needed to build and maintain secure and resilient network environments. You will move from foundational concepts-understanding LANs, WANs, and network devices like routers, switches, and firewalls-to mastering the core principles of Confidentiality, Integrity, and Availability (the CIA triad). The book dissects the modern threat landscape, from Man-in-the-Middle attacks and DDoS to the sophisticated lifecycle of Advanced Persistent Threats (APTs). Navigate the complex web of regulatory frameworks, including NIST, ISO 27001, HIPAA, and PCI DSS, and learn how to integrate their requirements into a cohesive security posture. Learn to implement practical, hands-on security by hardening infrastructure devices, securing vulnerable IoT and OT networks, and tackling the unique challenges of cloud and hybrid environments under the Shared Responsibility Model. Crucially, this book guides you through the paradigm shift to a Zero Trust Architecture, built on the principle of ""never trust, always verify"". It is an indispensable resource for the vigilant guardians of our digital world, offering the tools and strategies needed to architect the resilient networks of tomorrow and defend against the ever-evolving landscape of cyber threats.

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