What is a reverse proxy?

Reverse proxy server – core components in security architecture

Cyber criminality is a big issue for most companies’ IT departments. Online attacks threaten the security of private networks and cause millions of dollars of damage per year. Popular targets are servers that provide online services and therefore require a permanent internet connection. An extra layer of security can be applied by using an upstream network component – the reverse proxy. This...

Virtual machines

An introduction to virtual machines

Virtual machines are extremely practical and versatile: Do you want to set up an isolated test environment, run a Linux application on your Windows computer, or provide different operating systems for cross-platform software tests? With the right virtualization software and an appropriate image file, this is easy. We will introduce you to the basics of hypervisor-supported hardware virtualization...

What is Object Storage?

Object storage: The modern storage solution

Which storage method is the best solution for you or your company? You have several options to choose from. Object storage is relatively new, but already very popular. Data is turned into objects. Instead of using folders, everything is on the same level. How does object-based storage work? And what are the advantages?

Ethernet frame

Ethernet frame: definition and variants of the frame format

Ethernet frames enable the transmission of data over an Ethernet connection and are essential for local area networks. Ethernet frames are structured and sized differently depending on the protocol, and contain important information such as MAC addresses, protocol information, length information, and much more. The established Ethernet standard IEEE 802.3 has also developed special frames for VLAN...

Broadcast address

What is a broadcast address and how does it work?

Broadcasting is one of the most diverse means of communicating in a network. A data packet is sent to an entire network from one point, without having to specify one or more recipients. You direct your data packet to the broadcast address to do this. In this article, we explain what the broadcast IP is and how you can find out this address. We also give you a simple explanation of what a broadcast...

An introduction to TCP/IP

TCP/IP explained simply

Without TCP/IP protocols, you wouldn’t be able to read the words on this page. TCP and IP, the two foundational protocols of the suite, along with other related sets of rules, define how computers communicate over the Internet and other networks. In fact, the standards are so established that every device on the Internet follows these protocols to ensure the smooth transfer of data.

MAMP: the practical software stack for Mac OS X

MAMP: the local development environment for Mac OS X

If you’re developing a website, it’s important to regularly ensure that all the elements function as intended. Although there are no specific tools required for creating a basic info page with static content, it’s not possible to preview a project containing dynamic elements without some additional tools. The simplest solution is to use an all-in-one development environment like MAMP.

CardDAV

CardDAV: contact details always at hand – wherever you are

Whether on mobile or on your PC, being able to access address and contact details is important for personal and professional reasons. With CardDAV, contact information can be stored and synchronised across different devices and accessed by multiple users. But what is CardDAV, how does the network protocol work and what benefits does it offer?

Allocating directory rights with chmod

What is chmod?

With Linux, access rights for directories and files are often set through the terminal where file owners can be defined and groups can be assigned. With the ‘chmod’ command, user classes can be assigned certain file rights. Access rights in the Unix file system can be changed in two different ways: symbolic or numeric. Find out more about both notation types here.

LAN

LAN – Local Area Network: The Technology at a Glance

LAN is often used in relation to setting-up internet access and providing data for multiple end devices. But many users aren’t familiar with what a LAN actually is and how it differs from WLAN, nor whether a LAN is indeed relevant for them. Our article answers the most important questions.


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