Hetzner - DokuWiki



Data traffic

Data traffic (or just traffic) in regards to computers refers to the flow of information within computer networks.

This traffic is quantified by the amount of data transferred. If I transfer e.g. a 1 megabyte (large) file from one PC to another this results in traffic of (approximately) 1 MB.

Usually this term is used by hosting providers and is meant for cost accounting. Most providers have a free quota (or free traffic) and the client only pays for additional traffic. The real costs vary greatly depending on the amount of data and the guaranteed bandwidth, but are usually a mere 5 cents per gigabyte. The customer usually pays around 20 Cents to several Euros per gigabyte.

Dedicated Server

A Dedicated Server is a server (for example a web and mail server) that, as opposed to Shared Hosting, is used by just one client of a webhosting company.


File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another host over a TCP-based network, such as the Internet. It is often used to upload web pages and other documents from a private development machine to a public web-hosting server.
From: http://en.wikipedia.org/wiki/File_Transfer_Protocol


HyperText Markup Language (HTML) is the main markup language for web pages. HTML elements are the basic building-blocks of webpages.
From: http://en.wikipedia.org/wiki/HTML

Internal Traffic

Data traffic between and within the data centers.
Hetzner does not calculate the internal traffic (it is free).

KVM Console

A device that supports the remote control of a server down to the BIOS level.
See: KVM Console


PHP is a general-purpose server-side scripting language originally designed for Web development to produce dynamic Web pages. It is among one of the first developed server-side scripting languages to be embedded into an HTML source document, rather than calling an external file to process data.
From: http://en.wikipedia.org/wiki/PHP


A Windows program that test the connection quality to another network server.
See: Pingplotter (currently only in German)

Data Center

With data center we are referring to both the building, the premises where the computers of one or several companies or organizations are housed, as well as the organization itself who takes care of these computers. The common abbreviation is DC.

Hetzner operates the following data centers: Data Centers

More information and pictures can be found here: http://www.hetzner.de/en/hosting/unternehmen/rechenzentrum


A tool for comparing files on different servers.


A tool to transfer data over an encrypted connection.

Software RAID

Software RAID is when the interaction of multiple drives is organized completely by software.
See: Software RAID


Text-based control window of an operating system.

Storage capacity

Storage capacity is the total available space of a data structure or a storage medium.

Megabyte (220 = 1.048.576 Bytes ca. 106 Bytes)

  • 5 MB - The Bible as text
  • 650 to 700 Megabytes - A CD-ROM

Gigabyte (230 = 1.073.741.824 Bytes ca. 109 Bytes)

  • 5 GB - A compressed movie

Terabyte (240 = 1.099.511.627.776 Bytes ca. 1012 Bytes)

  • 20 TB - The text size of the collection of the Library of Congress with about 20 million books (1963 - should now be up to 80 TB)

Petabyte (250 = 1.125.899.906.842.624 Bytes ca. 1015 Bytes)

  • The storage capacity of the world's largest data centers in late 2002 was between 1 and 10 petabytes

Hetzner always discloses traffic based on powers of 2, so for example 1 GB = 1,073,741,824 Bytes.


Shell over an encrypted connection.


In computing, a uniform resource locator or universal resource locator (URL) is a specific character string that constitutes a reference to an Internet resource. A URL is technically a type of uniform resource identifier (URI) but in many technical documents and verbal discussions URL is often used as a synonym for URI.
From: http://en.wikipedia.org/wiki/Uniform_resource_locator


An uninterruptible power supply (also Uninterruptible Power Source) ensures that even when the power grid goes down, there is still a power supply. Fluctuations in the power grid of the utility companies are now also part of the picture, so that the UPS will also adjust for variations (peaks, etc.). UPS are used among other places in hospitals, television and radio stations, data centers and operations centers.

All Hetzner data centers use UPS (as well as having backup diesel generators).

© 2019. Hetzner Online GmbH. Alle Rechte vorbehalten.