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Red-green blindness

Definition: In red-green blindness, the eye completely lacks the perception of the colors red and green. This must be distinguished from red-green weakness. Here the colours are registered with less intensity. Both forms are based on a disturbance of the sense of colour, which is genetically determined. Causes The...

Rich snippets

Google and other search engines are continuously working to improve their search results and presentation to search engine users. Since 2009, Rich Snippets have been a way for website owners to make the information displayed in search results richer. What are Rich Snippets? Rich snippets are short lines of...

RIPE

What is RIPE? RIPE is short for “Réseaux IP Européens”. It is the name of a working group founded to coordinate the Internet. The working group is based in Amsterdam. The interest group was created from the cooperation of the operators of computer networks with Internet Protocol (IP). The...

RLSA

Not every Internet user buys immediately on his first visit to a website. However, since he has expressed his interest, it is worthwhile in many cases to approach him again at a later point in time. This renewed approach is possible with RLSA . What is RLSA? RLSA is...

Robots.txt

A domain usually contains several directories and pages. However, not all pages and directories should be crawled and indexed by search engines. With the help of robots.txt these contents can be excluded. By loading the video, you agree to YouTube’s privacy policy.Learn more Load video Always unblock YouTube What...

Rootkit

What does Rootkit mean? A so-called “rootkit” is not a single piece of malicious software, but rather a collection of different malicious programs that usually reach the victim’s computer via a security hole and permanently implant themselves in the system. They are remotely controlled and give the attacker full...

Rootserver

A root server is a special type of dedicated server that promises particularly high performance. Unlike virtual servers, the customer has the entire physical server to himself and thus has direct access to all functionalities. Such a server does not have to be shared with other users. In most...

RoundCube

RoundCube is a webmail client based on the IMAP network protocol. The open source solution can be installed on own servers and is often used by web hosting providers, companies, universities and other organizations. In addition, Cube is used as a web interface for the open-source groupware “Kollab”. The...

RSS feed

1. what is an RSS feed? RSS feed is a web feed that allows users and applications to access website updates in a standardized, computer-readable format. For example, these feeds allow a user to follow many different Web pages in a single news aggregator. The news aggregator automatically checks...

Ruby

Ruby is an object-oriented programming language that was made available to the general public in 1995 and has since been used in a variety of different areas. Since 2012, the standard that precisely specifies the programming language has been unified under the ISO/IEC 30170 standard. How did Ruby come...

Ruby on Rails

What does Ruby on Rails mean? Ruby on Rails (ROS) is a so-called “framework” based on the extremely popular programming language Ruby. With Rails you can create dynamic websites that access dynamic databases and in many cases are programmed faster and easier than with other similar programming languages such...

RUM Speed Index

The term“RUM Speed Index” is used to indicate the speed at which a web presence is loaded in the user’s web browser. The abbreviation “RUM” refers to the English term “Real User Monitoring”, which translated into German means something like monitoring real users. Behind this is a method for...

Run-of-Network (RON)

The term Run-of-Network (RON) refers to a specific procedure that is primarily used in online marketing campaigns. As part of the run-of-network, a marketing campaign is booked simultaneously with an online advertising provider on many websites that this provider manages. This method is characterized by a particularly high coverage...