Fog computing: decentralized approach for IoT clouds

Traditionally, cloud solutions are designed for central data processing. IoT devices generate data, send it to a central computing platform in the cloud, and await a response. However, with large-scale cloud architectures, such a system inevitably leads to bandwidth problems. For future projects such as connected cities and smart manufacturing, classic cloud computing is a hindrance to growth. The...

An introduction to virtual machines

Virtual machines are extremely practical and versatile: Do you want to set up an isolated test environment, run a Linux application on your Windows computer, or provide different operating systems for cross-platform software tests? With the right virtualization software and an appropriate image file, this is easy. We will introduce you to the basics of hypervisor-supported hardware virtualization...

Golang: the simple programming language from Google

Google is best known for its search engine, but also for services like AdWords, Maps, or Gmail. Since 2012, the mega-corporation has had its own programming language in its product range: Go. Also known under the name Golang, it has drawn attention to itself through its simplicity. But how does it differ from established representatives like C++ or JavaScript? And when does it make sense to...

SAN storage: how to safely store large volumes of data

Due to rising worldwide data usage, more and more companies around the world are moving away from dedicated data servers and instead opting for more holistic solutions in the form of centrally stored data networks. This structure is carried out in the form of storage area networks, or SANs. SAN storage users profit from quick data access and comprehensive hardware redundancy.

Network time protocol (NTP): definition and functionality

Computer systems and applications use time stamps for communication purposes. Synchronous system times are highly important for these so-called temporal signatures to be of any use – especially for systems that exchange information via the internet. A protocol that has provided valuable assistance for decades is the network time protocol (NTP) – here is an introduction to NTP, as well as some...

Introduction to PowerShell – Tools for system administrators

For a long time, Windows users were left behind when it came to command interpreters because the command prompt did not allow full access to operating system internal components, and scripting also offered only limited possibilities. This should finally change thanks to Microsoft’s PowerShell. The cross-platform program not only does much better than cmd.exe, it also provides remote computer...

CSMA/CD: Explanation of the process

Rules must be observed when communicating in a group. This is no different with local networks: CSMA/CD regulates how data packet collisions must be handled in a LAN network. But what happens if several participants attempt to simultaneously carry out a transmission and the information gets lost? Carrier Sense Multiple Access with Collision Detection is an important procedure for smooth network...

CSMA/CA: definition and explanation of the method

How do you achieve order in a wireless network? If all devices were to send information amongst themselves in an uncoordinated way, the data would rarely reach the recipient without problems. With CSMA/CA, there is a protocol that organizes the process and avoids collisions – without the need for central coordination. It’s a complex time management system. We go through the process step by step so...

CIDR: what is classless inter-domain routing?

The internet – just like other large networks – must be precisely subdivided. The network classes, used until the 1990s and not yet completely gone from the scene, were far too inflexible for the requirements of the digital world. CIDR can help: With classless inter-domain routing, it’s possible to create effective subnets and routes. We explain how this works.

Linux vs. Windows: a comparison of the best web server solutions

The duel between Linux and Windows may have an obvious victor on the home computer front, but the battle for server use paints a very different picture: since the beginning, Linux has bested Windows, as usage figures show. But many users remain unconvinced by statistics and rightfully ask the question: what are the actual differences between the two platforms?