How To Run Your Containers in the Cloud

Many organizations use cloud services. Many deploy network services as containers. And now, many are combining the two. Let’s look at the advantages of running containers in the cloud. Isn’t This Virtualization on Top of Virtualization? Yes! It has to be. There is no way to do what is defined as cloud computing without virtualization! […]
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The Colors of Wires in a Multi-Pair Cable Are Useful if You Know the Code

In a recent Introduction to Networking class, a participant asked whether the colors in the 10BaseT networking cable were always the same as the ones in the course notes. I replied that while “always” is a strong word, they should always be those colors. The participant asked why, and I followed up with a bit […]
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How I Was Wrong About Kerberos

Microsoft’s Active Directory includes a version of Kerberos that has had a bad reputation. There were problems several years ago, but the criticisms are now outdated. What was the problem, and how has it been fixed? Origins of Active Directory Windows 2000 was originally going to be called Windows NT 5.0. It was released in […]
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Do You Know the New Linux Networking Commands?

Back in April, I explained the new network interface names. Instead of eth0 it’s something like enp0s4 or p7p1. Let’s see how to check the settings. Run these commands on your system and play along! Physical Devices First, what are the network class devices? This system has two Ethernet interfaces: $ ls -l /sys/class/net total […]
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Using the Wifi Analyzer App to Examine Networks

One of my favorite tools on my Kindle and phone is Wifi Analyzer. It is a tool that shows information about Wi-Fi networks in range of the device. I am scheduled to teach Learning Tree’s Introduction to Networking soon, and this is a tool I demonstrate to participants. Of course, neither this post nor my […]
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