Most networking books teach either theory or commands. This one teaches judgement: why networks are built the way they are, what fails in real life, and how to design so that it doesn't.
You follow Harbourline, a fictional bakery business, as it grows from a single café running on a home router to a business with several cafés, a central kitchen, a warehouse, a head office and cloud services. Each chapter opens with a real problem the business faces, then explains the ideas that solve it, with numbers, tables, worked examples and real command output.
What's inside:
- Foundations: how a packet travels, addressing, switching, routing and network architecture
- Resilience: designing for failure, redundancy and failover
- Wi-Fi: how it really works, and why it really fails
- WAN and cloud: SD-WAN, data centre and hybrid cloud networking
- Security: firewalls, segmentation, 802.1X, zero trust, VPN, ZTNA and SASE
- Operations: monitoring, troubleshooting, and taking a project from idea to live network
- Real-world designs: branches, campuses, factories and warehouses, hospitals and hotels, retail chains
- What's next: network fabrics, VXLAN and automation
The book is vendor-neutral. Short Cisco and Aruba examples appear only where they genuinely help. Every chapter ends with common mistakes, a deeper worked example and key takeaways. The appendices add a glossary, cheat sheets and further reading.
Who it's for: people starting out in networking, engineers who can configure a switch but want to understand the design behind it, and IT managers who need to make sound network decisions
