SSL/TLS certificates play an increasingly important role in the transmission of sensitive data. They guarantee that data packets reach the desired addressee without any detours. Problems only arise when internet users are deliberately redirected by invalid certificates from dubious certification bodies – a scenario that can be prevented using so-called HTTP public key pinning (HPKP).
Deep learning, along with machine learning and artificial intelligence, is one of the main buzzwords in information technology. In discourse, though, the terms often get mixed up. What are the differences? What is the relationship between the methods? We provide you with an overview, show you how deep learning works, and what practical applications are possible.
For businesses, a reliable IT infrastructure is just as integral to day-to-day operations as competent management, productive employees, and reasonable working conditions. A server outage is able to paralyse an entire company. Adequate preparation can help prevent some of the most common errors from occurring; unforeseen risks, however, will always remain a factor. In order to be on top of your...
If you regularly use spreadsheet programs to process large datasets, you will welcome anything that helps. This is where drop-down lists in Excel come in. These allow you to conveniently add content with just one click so you don’t have to type the same thing again and again. We show you how to insert a drop-down in Excel.
You can use the SUM function to quickly add up several values. But if you want to calculate hours in Excel, you first have to adjust the format of the cells. The format has to be correct, otherwise you’ll encounter problems when you add up more than 24 hours. In that case, your total could be missing an entire day. We’ll teach you how to add hours in Excel and avoid common mistakes.
NoSQL is a growing trend in the world of data storage. This should come as no surprise: NoSQL databases are considered more flexible, more powerful and more functional than traditional database models. For example, they are now the preferred database model for big data applications. But what is NoSQL and what are the advantages or relational SQL databases?
Although address management on the internet is highly complex, it is clearly regulated by the Domain Name System. The system ensures that clients and servers can easily communicate with each other. It also allows reverse DNS checks which can find the hostname for any IPv4 or IPv6 address. This article explains how this works, and for what purpose these requests are made.
The two elementary programming paradigms – imperative and declarative – can best be described as fundamental programming styles. Thus, they are not the “programming styles” of individual programmers, but fundamentally different technical approaches for programming software code. In this article, we examine the programming language paradigms including their subsidiary forms.
There are different reasons for why you might want to rotate your computer screen. Some users rotate their screen to use it as an upright, vertical display. Others have done this by mistake. Luckily, Windows 7, 8, and 10 offer an easy fix for adjusting display settings. You might even be able to use shortcuts on your PC or laptop to rotate your screen.
Many applications that run on your home PC or smartphone rely on data from the Internet—more precisely, from servers. One way for devices to communicate with each other is through web services. The technology is based on standardised formats such as HTTP, SOAP and XML. But how does it work?