Blog



Video: How to Subnet in Your Head

Posted on February 9

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Learn to subnet in your head in just seconds! This clip is from my Pluralsight course Basic Networking for CCNP Routing and Switching 300-101 ROUTE.


Get a Free Hardcopy of “Learn Cisco Network Administration”

Posted on January 24

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For the rest of this month, I’m giving away 10 free hardcopies of my book . Even if you already own the book, you can pick up a free extra copy to give to a friend, coworker, or just to leave around the office. There are two ways you can get your copy: If you’ve […]


Understanding the Meltdown Attack

Posted on January 5

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This month, security researchers released a whitepaper describing the Meltdown attack, which allows anyone to read the full physical memory of a system by exploiting a vulnerability in Intel processors. If that sounds bad, that’s because it is. It means that if you’re running workloads on a public cloud provider, and you don’t have a […]


3 Ways to Increase Your IT Earnings in 2018

Posted on December 31

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As 2018 draws near, companies go into hiring mode, and people come and go, which often leaves a lot of open positions. If you qualify to fill one of the more in-demand positions, you can often negotiate a higher salary. My biggest salary jumps have always come in the first quarter of the year. To […]


4 Inconvenient but Effective Security Measures

Posted on October 4

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Security usually requires sacrificing convenience (or money). So naturally, we tend to get away with as little security as possible. But if you’re a glutton for punishment, here are 4 very inconvenient but highly effective measures you can take right now to protect yourself from theĀ  evils lurking on the interwebs. Disable JavaScript Yeah, I […]