Cisco Certification: The OSI Model Isn’t Just For Exams Anymore!
There's nothing I enjoy more than teaching Cisco technologies, especially CCNA candidates. Whether it's in-person or online, everyone's excited to…
Part of the
network
network
Tag: OSI model
Application Layer Filtering (ALF): What is it and How does it Fit into your Security Plan?
ALF, not a nickname for Alfred but an acronym for Application Layer Filtering, is one of the hottest new buzzwords…
Essential Network Concepts Part 1
Welcome to article number 4 in my Cisco CCNA in 15 minutes a week series. This week's article begins the…
Understanding Network Models – The Cisco Network Design Model
This article focuses on another important network model, the Cisco hierarchical network design model. Very different that the OSI model,…
Understanding Network Models – The OSI Model
I have to assume that after reading the title to this week's article you probably let out a low, discerning…
The Difference Between a Hub and a Switch
You wouldn't believe how many times I have been asked the question "So what exactly is the difference between a…
