Learning Tree International Blog

Gone are the days of carrying sheaths of papers to a business meeting. It is far more convenient to use a notebook, tablet, or e-reader. While software is available for a notebook to read almost any file format (or view that format on the web), tablets and e-readers can be a bit trickier. A small […]

Spammers and phishers often forge email “from” addresses to make their messages look legit. DKIM (DomainKeys Identified Mail) is a tool designed to help these forgeries. The idea behind DKIM is straightforward: an outgoing mail server digitally signs an email message and the receiving system, or perhaps the mail client itself, verifies the signature. In […]

The first step in solving a problem is to recognize that it does exist. Zig Ziglar It is important for us to know what the weaknesses in computer systems in order to know how to secure them. To that end MITRE maintains lists of computer vulnerabilities and weaknesses in software systems. They recently updated the […]

When we present data in a report or spreadsheet we often use some type of graph or chart to make the information clearer to understand. Unfortunately, using the wrong type of presentation can confuse the reader. Consider these data: And these two presentations: Intuitively, the second seems easier to read, but why? The first is […]

What do you do if you think the name “SQL Operations Studio” isn’t quite exciting enough? Well, if you are Microsoft, you lead with the word “Azure”, as in Azure Data Studio. Don’t be fooled by the name; The Azure Data Studio is not just for Azure databases. Not only is the Azure Data Studio […]