What is MAC spoofing?

What is MAC spoofing?

MAC spoofing is a method by which unique hardware addresses are masked using a Locally Administered Address (LAA) in the software. MAC spoofing can offer protection for your privacy when using public LAN or WLAN networks, but can also be used for illegal network activities. We explain to you here how MAC spoofing works and which settings in Windows must be accessed in order to change your MAC...

What are system calls?

System calls: What are system calls and why are they necessary?

The core component of operating systems like Windows or Linux, known as the kernel, is crucial to be able to use the underlying hardware effectively. For security reasons, this system core works on a higher layer than application programs can normally access. It is only with so-called system calls that processes from system-external software can temporarily access the kernel mode.

Creating an IT disaster recovery plan

For when the going gets tough: the IT disaster recovery plan

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...

Reverse DNS

Reverse DNS (rDNS): Explanation and Function

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.

Windows 7: End of Life

Windows 7 end of support: What you need to do?

Even years after it was first released, Windows 7 continues to be one of the favourite operating systems worldwide. But with Microsoft announcing the end of its support for Windows 7, many PC users will need to upgrade or look for an alternative. But just because Windows 7 has reached the end of its life, doesn’t mean the software is no longer working. Windows 7 EOL means that Microsoft will no...

REST: the HTTP solution for web services

Resource-oriented web services based on REST

Combining different application systems has become increasingly important over the past few years. This trend is especially due to the increasing number of web applications being developed. In order to react to this trend, many different web services were developed that make data transfer across multiple systems possible. The Representational State Transfer (REST) is an architectural style that...

Introduction to TCP

TCP (Transmission Control Protocol) – The transmission protocol explained

Life without networks, especially the Internet, is unimaginable nowadays. Interconnected servers, PCs and mobile devices are virtually indispensable at home and at work. However, most of us know very little about the fundamentals of these networks. All the more reason to take a closer look at the Transmission Control Protocol (TCP), the central control component for data transmission.

The OSI model: a reference for standards and protocols

What’s the OSI model?

Those working with network technology are bound to encounter the ISO-OSI model sooner or later. This system subdivides communication between computer systems into seven different layers. Each of these layers is assigned a certain task. With the help of this layer model, subareas of abstract processes are able to be descriptively explained.

Quad9 DNS

Quad9: more security and privacy in the DNS

The Domain Name System (DNS) is important for day-to-day web browsing. However, it is increasingly obvious that the conventional DNS has some weaknesses. New providers are attempting to fill in the gaps. One of them is Quad9. Given that it has no commercial interests – and that it provides a high level of security and privacy – the public DNS resolver is a genuine alternative to the more widely...


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