Don’t Buy a Wi-Fi Range Extender Without Reading This First

A Wi-Fi range extender may not be the best idea for improving wireless network performance. My home office is as far away from the master bedroom as possible. That’s generally a good thing, but it’s not good when it comes to the wireless network. The Internet connection enters at my office, and that’s where the […]
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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 There were problems several years ago, but the criticisms are now outdated.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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