CIDR: Classless Inter Domain Routing

CIDR: what is classless inter-domain routing?

The internet – just like other large networks – must be precisely subdivided. The network classes, used until the 1990s and not yet completely gone from the scene, were far too inflexible for the requirements of the digital world. CIDR can help: With classless inter-domain routing, it’s possible to create effective subnets and routes. We explain how this works.

What is a root server? Definition and background

What is a root server? Definition and mechanics

When you call up a website, the entered domain first needs to be turned into an IP address and read out from the browser so that the page can finally appear in the browser. This process is known as name resolution. Here, the root name server or (DNS) root server in the domain name system plays a key role. But what is a root server? And what exactly goes on when they receive requests for...

CSMA/CD - Carrier Sense Multiple Access / Collision Detection

CSMA/CD: Explanation of the process

Rules must be observed when communicating in a group. This is no different with local networks: CSMA/CD regulates how data packet collisions must be handled in a LAN network. But what happens if several participants attempt to simultaneously carry out a transmission and the information gets lost? Carrier Sense Multiple Access with Collision Detection is an important procedure for smooth network...

Hosts File

What is the hosts file and how do you edit it?

The hosts file used to resolve website names so that certain IP addresses could be accessed. The method was largely replaced by the DNS (domain name system). However, the hosts file is still indispensable for local networks. In addition, certain rules can be set for websites e.g. to block them. We show you where you can find and edit the hosts file in your operating system.

ASCII-Codes | Overview of all characters on the ASCII table

ASCII - American Standard Code for Information Interchange

Every day we work with text on PCs, smartphones, tablets and other computer equipment using our keyboards. We expect letters, numbers, and characters to appear on the monitor before us. The fact is that there is a decades-old coding system behind this everyday function. Since the 1960s, ASCII has determined how computers interpret our input. We have prepared a practical ASCII table to help you...

Windows CMD commands

Windows command prompt: CMD commands explained

There are more than 200 CMD commands available with Windows. The command prompt can be used to control large parts of the operating system, computer, or drives. You can also use the Windows “command prompt” commands to organize your files or run network tasks. To do this, though, you have to know the right commands. Here we explain how to use CMD commands and which functions they have. Our article...

Free dynamic DNS providers: An overview

The best free DynDNS providers

You would like to access your home computer, but don’t know how? Does your home network with its constantly changing IP addresses jack up your monthly bill? Dynamic DNS services (DynDNS) can help you out. Find out which DynDNS providers are the best and what the advantages and disadvantages of each are in this overview.

Make a bootable USB drive

Make a bootable USB drive and save your computer

Optical installation media are yesterday’s news. A bootable USB drive is not only faster and more practical than a CD-ROM, it can also do a lot more: For example, create a portable operating system with which you can use Windows as well as Linux computers. The most important function, though, is the ability to boot and repair a PC following a serious system problem. To make such a bootable USB...

DNS server not responding – what’s next?

DNS server unavailable? Here’s what to do

‘DNS server not responding’ is a typical error response on Windows. Its presence indicates that some sort of problem is occurring with your internet connection. This phenomenon can be the result of many different causes. In addition to network problems, routers, Windows Firewall, and the web browser are also taken into account when troubleshooting.

How to take a screenshot on Windows

Create a screenshot on Windows: How it works

With screenshots, you can show your colleagues and friends with just a few clicks what you’ve just seen on your screen. This can be an important part of your daily workload as well as something you use in your free time. But how do you actually create a screenshot? On Windows, the necessary resources are already built in. We explain to you how to use them correctly.

Server

1&1 IONOS Server Guide: professional tips on configuration and administration

Servers are what make up the physical basis of the internet. Setting up your own professional site, putting products online for sale, or connecting multiple company locations with one another: all of these tasks require the support of high-performance computers. And it doesn’t matter if you purchase hardware resources for your own data center or opt for the flexibility of cloud services: operating a server comes with the challenge of independently configuring and administering hardware components. But don’t worry, there’s a lot of support out there for these tasks. In the Server Guide of 1&1 IONOS’s Digital Guide series, you’ll find regular articles, news, and tutorials on how to operate this indispensable component of today’s IT infrastructure.

Server information for businesses, developers, and tech hobbyists

Packed with practical tips, our guide covers a wide spectrum of topics primarily aimed at mid-sized companies, freelance developers, and tech hobbyists. While some articles, like ‘What is a server?’ or ‘DNS – name resolution online’ cater more to beginners, experts are by no means left hanging; there’s a wide range of detailed texts and tutorials on important tasks like choosing the best operating system, filling security gaps, or getting the best possible performance out of your software and hardware.

What you can expect in the 1&1 IONOS Server Guide

If you take a look, you’ll notice our guide is divided into four different subcategories, each covering a different topic. The ‘KnowHow’ area sets out to familiarize beginners with the basics of operating a server. Details on different server types and how to use them are also laid out here. Tips and tricks on managing server software is found under the keyword, ‘Configuration’. The category, ‘Security’ is all about dealing with potential problems server operators may encounter from online threats. Conventional methods of attack, like viruses, worms, and Trojans, and what you can do to combat them are explained here. And the category, ‘Tools’, provides useful guidance on what resources can help make administering your server a more manageable task.


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