Overview

""Mastering VLANs: Configuration, Segmentation, and Security"" is an authoritative guide for network engineers, architects, and IT professionals seeking to design, secure, and optimize modern Ethernet networks. The book opens with fundamental concepts of VLAN architecture, the evolution of IEEE 802.1Q standards, and deep dives into Ethernet frame structures, switching models, and broadcast domain isolation. It methodically demonstrates the critical roles of segmentation and traffic control, while addressing scalable network design, loop prevention mechanisms, and practical motivations for virtual network partitioning. Building on these core principles, the book transitions into advanced VLAN design patterns tailored for campus, data center, and multivendor environments. Readers explore frameworks for aligning network topologies with business, regulatory, and operational needs-covering best practices in VLAN numbering, documentation, and compliance-driven segmentation for standards such as PCI-DSS and HIPAA. Step-by-step configuration techniques for Cisco, Juniper, Aruba/HP, and other platforms are clearly mapped, including troubleshooting methods for heterogeneous deployments, VLAN tagging in service provider networks, and automation using modern orchestration tools. The later chapters delve into security, virtualization, and the future of automated VLAN management. ""Mastering VLANs"" covers cutting-edge topics such as private VLANs, dynamic VLAN assignment via 802.1X and RADIUS, Layer 2 attack mitigation, and integration with SIEM platforms. Comprehensive content on VLANs in virtualized and cloud-native environments-including Kubernetes and overlay networking-ensures relevance for evolving architectures. The book culminates with robust methodologies for automation, SDN integration, and troubleshooting, imbued with real-world case studies to empower readers with the confidence and technical depth needed to build secure, scalable, and resilient networks.

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