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 …

AWS Certified Solutions Architect Study Guide: Associate SAA-C02 Exam 3nd Edition AWS Certified Solutions Study Guide: Associate (SAA-C02) Exam, Third Edition comprehensively and efficiently prepares you for the SAA-C02 Exam. The study guide contains robust and effective study tools that will help you succeed on the …

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 …

I recently got an email from a viewer of my Practical Networking course who asked how the TCP/IP networking terms I used mapped to the Open Systems Interconnect (OSI) model. First, a bit of background. The OSI model is a generic networking model that is supposed to describe conceptually how networks carry data. Within …

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.

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 …

I think it’s time to stop using the term “network function virtualization”. Why? Because it doesn’t exist, at least not in the way the term suggests. The term is a category error, and when people try to make sense of the term, confusion and frustration ensue. Think of it like this: what’s the difference between a …

The pre-release of my new book, Learn Cisco Network Administration in a Month of Lunches, is available from Manning Publications’ early access program. The book is a tutorial designed for beginners who want to learn how to administer Cisco switches and routers. Set aside a portion of your lunch hour every day for a …