CCNA Quick-Revision Map

I’ve been going through a “Cisco CCNA Summary” deck that’s built for fast recall + hands-on practice — it compresses the topics you actually touch in Packet Tracer / real configs into a clean, visual flow.

What I liked most: it connects concepts → commands → verification, so you’re not memorizing in isolation.

Here are the chunks that make it bookmark-worthy:
✅ OSI 7 Layers refresher (with examples that stick)
✅ Subnetting / prefixes (the mental model + practice patterns)
✅ Core CLI muscle memory (interface, hostname, saving config, show commands)
✅ VLANs + Trunking (access vs trunk, allowed VLANs, native VLAN, dot1q)
✅ STP (roles, states, root bridge logic, PVSTP + verification)
✅ EtherChannel (LACP vs PAgP, why it matters, how to verify Po interfaces)
✅ Routing basics

Static routing (2–4 router scenarios)
Dynamic routing overview + EIGRP / OSPF step-by-step flow

#cisco

The Purple Book on Cyber Security

The Purple Book on Cyber Security is built for the people in the middle: Sales, Pre-sales, and Delivery teams who need to speak security clearly, scope it correctly, and run it reliably.

What makes it different:
🟣 Beginner-friendly, practical structure

Each topic is organized as:
✅ Basics (what it is + why it matters)
✅ Sales cues (questions to ask, objections you’ll hear)
✅ Pre-sales cues (sizing, integrations, implementation steps, what can go wrong)
✅ Delivery cues (daily/weekly/monthly ops, L1/L2/L3 responsibilities, reporting & governance)

🧠 It also clarifies the foundations:
Cybersecurity vs Information Security (and why InfoSec = Cyber + Physical)
Why “Purple” matters: bridging offense (red) + defense (blue) through collaboration (Purple Teaming)

If you work with customers and you want to:
✅ qualify better
✅ avoid scope surprises
✅ speak security without overpromising
✅ deliver repeatable outcomes