Encyclopedia

DNS leak

DNS leak

Are you concerned about maintaining your privacy and use a VPN when surfing? Great – but this can make you uniquely vulnerable, too. We will show you the dangers posed by DNS leaks and explain how you can effectively protect yourself against them. In the process, we also look at DNS leak testers.

Secondary DNS

Secondary DNS

The DNS is one of the cornerstones of the Internet. To ensure that the resolution of domain names into IP addresses works reliably, the information of a DNS zone is stored redundantly all over the world. But how does the mechanism by which changes are made to the redundant copies work? The answer is rooted in the difference between primary and secondary DNS.

DNS zone

DNS zone

Many Internet users have a basic idea of what the term “domain” refers to. After all, domains are abundant on the Internet via URLs. If you delve deeper into the subject, though, it quickly becomes confusing. “Name server,” “DNS zone,” “zone file”: What do these terms mean, and how are the concepts related? We’ll shed some light on the topic here.

Python tutorial

Python tutorial: Basics and tips for beginners

The Python programming language is not only versatile, it’s also relatively easy-to-learn. But that doesn’t mean you can only use this dynamic language for small-scale projects. It’s also great for large-scale projects, especially in the areas of machine learning and data science. In this Python tutorial, we’ll explain the basics of Python and provide tips on learning the language.

Blockchain

Blockchain

Blockchains are a rather hot topic right now. Though the term is far less common than Bitcoin itself, its significance in today’s world far exceeds that of the latter. After all, cryptocurrencies are run entirely on blockchain technology, which combines peer-to-peer networks with cryptographic methods and various assumptions of game theory. The result: reliable infrastructures tailored for...

What are data centers?

What are data centers?

Many businesses rely on their websites being available online 24/7. Technical failures can lead to significant losses in sales depending on the duration of an outage. To avoid these issues, larger companies rely on structures provided by a data center. This allows them to centralize and better organize their data processing and IT services. But what are data centers anyway?

Instagram alternatives

The best Instagram alternatives: Social networks for hobby photographers

Instagram alternatives don’t have it easy: Ello’s hype, for example, has faded, and Pixlr is a photo editing app at best. A “real” alternative to Instagram should have its own community and, like the market leader, should be available free of charge for Android and iOS and as a web application. We’ve picked the best ones for you.

Tumblr alternatives

An overview of the best Tumblr alternatives

With around 800 million users, Tumblr is one of the most popular, free blogging platforms. Nevertheless, it’s worth taking a look at the diverse Tumblr alternatives. Other platforms offer exciting features and thematic focus areas such as shop elements, a homepage feature or the publication of high-value blog posts using a consistent design. A Tumblr alternative may just be the right choice for...

Cryptocurrency

Cryptocurrencies: What’s behind these digital currency systems?

Ever since the unparalleled Bitcoin boom in 2017, which was to be followed by a no less spectacular drop, cryptocurrencies have been both an exciting and controversial topic. The billions of dollars traded by speculators on bitcoins and alternatives such as Ethereum are often not even considered in the providers’ plans – revealing a glimpse of the foundations of cryptocurrencies.


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