Protocols

What is port scanning?SP-PhotoShutterstock

What is port scanning?

  • Know-how

It’s easy to lose track of all the different programs that are responsible for inbound and outbound data traffic.

Networks hosting a large number of computer systems that are constantly communicating with online services often require technical backup. High-performance tools check the activities of various applications or computers and can close existing security gaps. Using port scanners is one…

What is port scanning?
Headless CMS

Headless CMS

  • CMS

If you want to juggle more than one channel with your content management system, you’ll quickly reach the limits. A classic CMS offers many simplifications, but at the same time is limited with its design options. For this reason, content creators sometimes rely on another solution: a headless CMS. This separates the frontend from the backend so that different websites and mobile apps can be…

Headless CMS
How to fix Error 401 UnauthorizedRoland IJdemaShutterstock

How to fix Error 401 Unauthorized

  • Technical matters

You’re surfing around on the internet, but instead of getting the desired content you only receive an error message: annoying or even downright frustrating. Especially if you don’t exactly know what the status is supposed to mean. How are you expected to solve the problem, if you don’t know what’s causing it? This also goes for the error 401. Here we explain what the error means and what you can…

How to fix Error 401 Unauthorized
How to fix Error HTTP 504 (Gateway Timeout)windwheelShutterstock

How to fix Error HTTP 504 (Gateway Timeout)

  • Technical matters

If the error message ‘HTTP 504 Gateway Timeout’ appears when you attempt to open a website, it means that the allowed time for responding to browser queries has been exceeded. A lot of the time the culprit is not the web server itself, but instead some other component of the server, i.e. a gateway, which is integral to the path of communication. What does 504 gateway timeout mean? How can you fix…

How to fix Error HTTP 504 (Gateway Timeout)
What is the ICMP?agsandrewShutterstock

What is the ICMP?

  • Know-how

In the background, numerous protocols ensure that communication and data transmission work in computer networks. As the most prominent representative, the Internet Protocol plays a fundamental role. Without its’ various extensions and additions they would be nowhere near as versatile, as is the case in the current protocol. Thanks to the possibilities offered by ICMP protocol error messages and…

What is the ICMP?
OSI ModelramcreationsShutterstock

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.

OSI Model
Simple network time protocol (SNTP)RDVectorShutterstock

Simple network time protocol (SNTP)

  • Know-how

An exact system time on a computer is especially important when devices need to exchange data. Cross-system processes quickly come to a standstill if the generated time stamps are very different from the time that applies to the system. Synchronisation methods that keep the clocks of the individual network participants in sync are utterly indispensable. One of the simplest methods to achieve time…

Simple network time protocol (SNTP)
SNMP (Simple Network Management Protocol)

SNMP (Simple Network Management Protocol)

  • Know-how

The communication protocol SNMP (Simple Network Management Protocol) is an elementary component of many network management applications. It defines a number of message types that greatly simplify the monitoring and administration of individual network participants such as PCs, routers, servers, switches, firewalls, or printers. How exactly the SNMP protocol works and what fundamental adjustments…

SNMP (Simple Network Management Protocol)
What is the Server Name Indication (SNI)?

What is the Server Name Indication (SNI)?

  • Know-how

What is server name identification, really? Encryption technologies play a big role when it comes to surfing on the net. Credit card data and other personal information must not fall into the hands of criminals. For now, TLS is one of the protocols used for this purpose. But it has a disadvantage: it only functions when each IP address only hosts one domain. If multiple virtual services are…

What is the Server Name Indication (SNI)?
RARP (Reverse Address Resolution Protocol)

RARP (Reverse Address Resolution Protocol)

  • Know-how

Out-dated technology can still be interesting. Even though the Reverse Address Resolution Protocol was introduced in 1984, and considered obsolete the following year due to the Bootstrap Protocol, it continued to be used long after. The RARP has not completely disappeared from network technology even today. As the Reverse ARP, this protocol is a counterpart to the Address Resolution Protocol. But…

RARP (Reverse Address Resolution Protocol)
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