Protocols

SCP Secure Copy

SCP (Secure Copy Protocol): What is SCP?

If you are looking to perform an especially secure file transfer between two computers (e.g. uploading data to a web server), there are several options available. One of these options is the Secure Copy Protocol (SCP) which provides authentication and encryption via SSH. In this article, you will learn what this protocol is and how the SCP transfer works.

What is MAC spoofing?

What is MAC spoofing?

MAC spoofing is a method by which unique hardware addresses are masked using a Locally Administered Address (LAA) in the software. MAC spoofing can offer protection for your privacy when using public LAN or WLAN networks, but can also be used for illegal network activities. We explain to you here how MAC spoofing works and which settings in Windows must be accessed in order to change your MAC...

TLS (Transport Layer Security)

TLS: How the Internet is encrypted

Internet security measures have become indispensable these days. Encryption is essential to ensure that unauthorised third parties do not gain access to data or are able to manipulate it. That’s what TLS or Transport Layer Security is for. Here’s what you need to know about this integral element of the modern Internet.

Error 405 Method Not Allowed: Explanation and solutions

HTTP Error “405 Method Not Allowed”: How to solve the problem

HTTP is indispensable as a mediator between the browser and web server: Both communicate with each other using the transmission protocol on the application layer by sending various types of messages. With an HTTP request, for example, the browser can request a resource or return its own data to the server. If one of these HTTP methods doesn’t work, error 405 (Method Not Allowed) occurs. But what...

File Transfer Protocol

FTP: File Transfer Protocol explained

The Internet is dependent on various protocols for facilitating communication. The File Transfer Protocol ensures that we can upload data to a server and download it again at a later point. You’re bound to run into FTP again and again, especially in the context of creating websites.

Introduction to TCP

TCP (Transmission Control Protocol) – The transmission protocol explained

Life without networks, especially the Internet, is unimaginable nowadays. Interconnected servers, PCs and mobile devices are virtually indispensable at home and at work. However, most of us know very little about the fundamentals of these networks. All the more reason to take a closer look at the Transmission Control Protocol (TCP), the central control component for data transmission.

The OSI model: a reference for standards and protocols

What’s the OSI model?

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.

SQL injection: Fundamentals and safeguards

SQL Injection: Protect your database system

There are daily reports on how security gaps in applications are exploited – because hardly a day goes by without a new gap being discovered or a known gap being closed. One attack method, which has always been based on exploiting such weak points, is called SQL injection. But what is actually hidden behind the malicious database exploitation and how can you protect your database system from it?

PHP 5.6 Support

PHP 5.6: Support stops at the end of 2018

Security support for PHP 5.6 ceases at the end of the year. Although developers had already postponed the end date by a year, many website operators still seem to be unprepared. A large number of websites still run on PHP 5.6. From January onwards, these websites will be at risk. However, many are dreading the update. How can you protect your website?

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...


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