Leanpub Header

Skip to main content

WLSI 300-120 v1.2 Complete Learning Guide

A Complete Learning Guide to Implementing Cisco Wireless Advanced Solutions v1.2

WLSI 300-120 v1.2 Complete Learning Guide
This book is 100% completeLast updated on 2026-08-26

Eight domains, 63 sub-sections, 260 questions with full explanations, and ten investigations drawn from real branch and campus networks. This guide covers every topic on the WLSI 300-120 v1.2 blueprint, built throughout on the Catalyst 9800 running IOS XE, with complete configurations you can read as you would type them and verification commands beside every one. Written for engineers who want the material to still be useful the week after the exam.

Minimum price

$11.99

$15.00

You pay

Author earns

$

Also available for 1 book credit with a Reader Membership

PDF
About

About

About the Book

What this book is

A complete, independent study guide for Implementing Cisco Wireless Advanced Solutions v1.2 (WLSI 300-120). All eight blueprint domains are covered in the depth their weighting deserves — the 20 % client security domain gets 50 pages, the 10 % hardening domain gets 23 — so your study time lands where the exam does.

Every configuration is written for the Catalyst 9800 running IOS XE, the platform the exam expects you to know, with AireOS equivalents given where engineers migrating an existing estate need the mapping.

What is inside
  • 334 pages across 8 sections and 63 sub-sections
  • 260 knowledge-check questions, five per sub-section, each with a full explanation of why the correct answer is correct and why the most plausible wrong answer is not
  • 57 diagrams drawn specifically for this book — data paths, decision trees, protocol exchanges and triage ladders
  • Ten worked cases from the field, each crossing domain boundaries the way real faults do
  • Complete blueprint mapping, a glossary of every term used, and a consolidated hardening checklist
How each sub-section is built

The same structure every time, so you always know where you are:

  1. Explanation from first principles — a mechanism you understand is one you can reason about under exam pressure
  2. Diagrams where the relationship is spatial or sequential
  3. Complete Catalyst 9800 configurations, with verification commands alongside
  4. Four kinds of margin note — Exam Tip where something is directly testable, Common Pitfall where deployments reliably go wrong, Did You Know for the detail that makes a mechanism click, and From the Field for what actually happens in production
  5. A summary and key takeaways, written so the takeaways alone work as a revision pass
  6. Five knowledge-check questions with full explanations


Who it is for

Engineers who can already build a wireless network and now have to make it work properly — at forty branches, under an audit, during an outage. If you hold a CCNA-level wireless certification or have run a campus wireless network, you have the foundation this book builds on.

Try before you buy

A free 40-page sample contains the front matter, the full blueprint mapping, and the first four sub-sections of the FlexConnect domain, reproduced exactly as they appear in the book. Nothing in it is abridged — it is what all 334 pages look like.

A note on independence

This is an independent, unofficial study guide. It is not affiliated with, authorised by, endorsed by or sponsored by Cisco Systems, Inc. All trademarks are the property of their respective owners.

Share this book

Categories

Bundle

Bundles that include this book

Author

About the Author

Jozef Baros

Jozef Baros is a Senior Network Architect, Teamleader, cybersecurity and technology automation specialist with over a decade of hands-on experience designing, securing, building, and operating large-scale enterprise networks for one of Europe's leading telecommunications providers. Working daily with Cisco and AI infrastructure across global enterprise environments, Jozef brings a rare combination of deep technical expertise and a practical, results-driven approach to complex technology challenges. His professional work spans network architecture, infrastructure automation, cybersecurity and cross-functional project management — giving him a uniquely grounded perspective on how technology actually performs under real-world conditions, not just in theory.

Get the free sample chapters

Click the buttons to get the free sample in PDF or EPUB, or read the sample online here

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earned over $15 million writing, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub