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IP Subnetting Part 1 — IPv4

The art form known as IP Subnetting requires a solid grasp of math based on binary numbers (0, 1).  In this first part of our devoted attention on IP Subnetting, we'll focus on Internet Protocol version 4 (IPv4) addressing, some history, and the methods available to make IPv4 addressing go farther.

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Troubleshooting with OSI Model

At Layers 1-4, there are several tools or tricks available to quickly verify normal operations.  Many of these tools are technology-specific, meaning that one tool has an application with one technology but not another.  In our third installment, we explain the "tricks of the trade" needed to excel at troubleshooting network and application problems at Layers 1-4.

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Overview of OSI Model

The OSI model tends to give a lot of people fits, since it's really abstract and doesn't seem practical at first.  Discover the foundation of internetworking through our original article on the OSI Model and what you need to know before you can apply it practically.

  • Moved to New Hosting

    To prepare for the end of the hosting contract with Site5, Primacore.net has moved to a shiny, new Virtual Private Server (VPS) hosted by ServerMania.com in Atlanta, GA.

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  • Content Move Complete

    After months of deliberations, head-scratching, and careful planning, the move of all the RouterLabPrep.com content has been completed.  Thanks in no small part to the lapsing of the domain, we were able to cut through our own red tape and finally move the remaining published and draft articles.

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  • Primacore.net is Relaunched

    To celebrate the new year (and lessen the sad memory that was WordPress), we've completed the first major milestone in redesigning our website.  Read on for a summary of what has changed, why it's better, and what is yet to come.

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  • Hello, World

    It finally re-happened.  In replacing RouterLabPrep.com, this site will still let me share what I know already, what I'm learning, and things coming along the horizon that may become technically significant in the IT world.  But everything posted is in proper context of what I do (running Primacore™), what Primacore™ stands for, and what I've can offer the world to help solve IT problems.

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