Network

The OSI model: a reference for standards and protocols
What’s the OSI model?
  • Know-how

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.

What’s the OSI model?
WhatsApp alternatives
The best WhatsApp alternatives
  • Social media

Invitations to dinner parties; updates about work; an excursion with the college soccer team: if you’re not using WhatsApp, you run the risk of missing out on important information. With more than a billion worldwide users to date, the app is more popular than almost any other on the market. But this networking comes with its disadvantages too: the main one being that WhatsApp shares user data...

The best WhatsApp alternatives
Comparison of the best antivirus programs
Antivirus software: Which software is best?
  • Security

Antivirus software has sadly become indispensable as new types of threats against your system emerge regularly. Viruses, worms, Trojan horses, and many other types of malware threaten to infect your system and could cause significant damage. To counteract these threats, software makers try to fight off malware attacks with intelligent antivirus programs. Find out which rank top in our antivirus...

Antivirus software: Which software is best?
Raspberry Pi projects
30 Raspberry Pi projects that show the possibilities of the mini computer
  • Know-how

Raspberry Pi is an inexpensive micro-computer that can behave like a standard computer in many respects. The innovative mini device can be used for a wide range of tasks - from setting up an operating system to surfing the web, to using it as a server or a media center. Discover 30 interesting Raspberry Pi projects to try out at home.

30 Raspberry Pi projects that show the possibilities of the mini computer
Banana Pi: useful applications and ideas for projects
10 Banana Pi projects that make the most of this mini-computer
  • Know-how

The Banana Pi isn’t big, but the single-board computer can be successfully used for a variety of applications. For example, this versatile competitor of Raspberry Pi can be used as a cloud, VPN or file server as well as a smart home controller or a router. We will show you ten Banana Pi projects which demonstrate the remarkable potential of the compact miniature computer.

10 Banana Pi projects that make the most of this mini-computer
Localhost
Localhost (127.0.0.1)
  • Know-how

What do you need a localhost for? Sometimes it can be useful to communicate with yourself. This is known as a loopback in network technology: instead of feeding a request to the network – e.g. the internet – you instead keep it within your system, subsequently stimulating a network connection. We will explain how the connection to 127.0.0.1 works, and what you can use localhost for.

Localhost (127.0.0.1)
Deleting a Telegram account
How to delete a Telegram account
  • Social media

Deleting a Telegram account is almost as easy as making one. We explain why people are making the move away from Telegram, how to completely delete your account, and what happens after you’re done. You should be aware that you can’t recover a deleted telegram account. Keep reading for a step-by-step guide including screenshots.

How to delete a Telegram account
PostgreSQL Could not connect to server Error
PostgreSQL “Could not connect to server” Error: How to troubleshoot
  • Know-how

One of the most common errors that occur when using PostgreSQL is the “Could not connect to server” error that results in a refused connection. Usually, the error can be fixed by taking just a few simple steps. In this article, we will show you how to fix a PostgreSQL that cannot connect to the server in Linux. Read on for more.

PostgreSQL “Could not connect to server” Error: How to troubleshoot
LDAP
What is LDAP: Definition and explanation
  • Know-how

What is LDAP and how does it differ from Active Directory? The LDAP Protocol is a lightweight variant of the DAP (Directory Access Protocol). With LDAP, directories can be searched in large quantities for data, information, devices, and resources. The basic idea behind LDAP is to quickly browse or make changes to a server-wide distributed directory tree.

What is LDAP: Definition and explanation
Understanding and Configuring DNS TTL
DNS TTL best practices: Understanding and configuring DNS TTL
  • Configuration

The DNS TTL value shows how long the results of DNS queries are saved for. Under certain circumstances, it may be useful for websites to check and/or change their DNS TTL values. Keep reading to learn about the best practices for DNS TTL, DNS TTL minimum and maximum values, and how to set DNS TTL values for your website.

DNS TTL best practices: Understanding and configuring DNS TTL