Why Do Changes Made to a Website Not Appear Immediately? Cache Problems and Solutions
We explain layer by layer why changes made to a website do not appear immediately: browser, server and CDN cache, and the versioning of CSS/JS files.
Category: Uncategorized
The Website Looks Broken on the Phone but Normal on the Computer: Why?
If a website looks fine on the computer but broken on the phone, the reason is a lack of responsive design. We explain the symptoms, the causes and the solution with a fluid layout.
The Website Opens Very Slowly: Causes and Solution Methods
Why does a website open slowly? Large images, heavy JS/CSS, slow TTFB and cache problems; methods for speeding it up through measurement, optimization and a CDN.
Why Does the Contact Form on a Website Not Send Email?
Does the contact form say "sent" but no email arrives? A permanent solution with closed SMTP ports, missing SPF/DKIM/DMARC, and an HTTP email API.
Why Is User Interface Design Important in PC Applications?
The importance of user interface design in PC applications: fewer errors and faster, more efficient use through simplicity, consistency and readability.
How Should Data Security Be Ensured in PC Applications?
Data security in PC applications: hashing of passwords, role-based authorization, the principle of least privilege, regular backup and operation logging.
What Should Be Considered in Database Design?
The fundamentals of designing a fast, secure and sustainable database with normalization, primary/foreign keys, correct data types and indexes.
Why Is Data Backup Important in Databases?
The importance of database backup; protecting data safely with full/incremental backup, automatic backup, the 3-2-1 approach and restore testing.
What Is an Encoder? Incremental vs. Absolute Encoders
What is an encoder and how does it work? The difference between incremental and absolute encoders, resolution, output signal types and selection criteria are explained step by step.
What Is EtherCAT? Working Principle and Applications
What is EtherCAT and how does it work? The processing-on-the-fly principle, distributed clock synchronization, topology options and its use in motion applications are explained.
How to Select an HMI? Panel and Software Criteria
How are screen size, resolution, processor and memory, communication protocols, protection class and software environment evaluated when selecting an HMI?
How to Select an Inverter? AC Drive Criteria
How are load type, current, overload capacity, braking resistor, EMC filter and communication criteria evaluated when selecting a frequency inverter? A step-by-step guide.