Here are the books I've authored or co-authored with David Clinton.

Amazon Web Services (AWS)

AWS Certified Cloud Practitioner Study Guide: CLF-C01 Exam

Set yourself apart by becoming an AWS Certified Cloud Practitioner. Click the book to view on Amazon.

For errata, click here.

AWS Certified Solutions Architect Study …

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Here you'll find a list of my IT training courses.

Amazon Web Services (AWS)

Architecting for Operational Excellence on AWS

Architecting for Reliability on AWS

Architecting for Security on AWS

AWS Networking Deep Dive: Elastic Load Balancing (ELB)

AWS Networking Deep Dive: Route 53 DNS

AWS Networking Deep Dive: Virtual …

January 31, 2020 update: No, you're not crazy. Cisco changed the exam number from 300-401 to 350-401.

For your convenience, I've put together the following list of my courses that cover the new CCNP ENCOR exam. By watching and following along with the hands-on demos in these courses, you can't go wrong.

Routing …

You took one of the Cisco CCNP exams. You went to the exam center, sat down, and started the exam. About 2 hours later, you saw the dreaded news appear on the screen:

You didn’t pass.

I’ve failed certification exams in the past, so I can relate to the facepalm-worthy feeling you get when you realize you dropped a …

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2022 Update: If you want a clear technical explanation of the OSI model, click on the cover of my book CCNP Enterprise Certification Study Guide: Implementing and Operating Cisco Enterprise Network Core Technologies for a free preview of Chapter 1 which explains each layer of the OSI model in intricate detail.

I …

Learn to subnet in your head in just seconds! If you like what you see, check out Cisco Enterprise Networks: Basic Networking and IP Fundamentals.

Cisco CCNA Routing and Switching learning path on Pluralsight

Certifications are often lambasted as “worthless pieces of paper” and “experience is more important.” But for some people, certifications are more important than experience.

A substitute for experience

Newcomers to the IT world face the classic problem: how do you get experience without a job? Sure, you can tinker …