Technological progress is great in many ways. The development of smart devices, AI, and different virtual tools are already making our lives simpler. And it seems there is no limit! However, how will this rapid progress reflect on people’s jobs? Most positions are expected to benefit from technology – specialists will become more productive and will be able to manage tasks easier and quicker. … [Read more...]
What is Military-Grade Encryption in VPN Service
Military-grade encryption can be an unclear phrase if the users are not well aware of the basics behind the terminology and existing offerings. Encryption in a VPN is very important for privacy, security, anonymity. A basic encryption system for the VPN may easily be breached by any malicious attempt. Few of the VPN services increasingly using the phrase military-grade encryption. Readers may read … [Read more...]
Theory for Running OpenVPN on Server
OpenVPN is a free software for building a Virtual Private Network (VPN) via an encrypted TLS connection. For encryption OpenSSL or mbed TLS can be used. OpenVPN uses either UDP or TCP for transport. OpenVPN is under the GNU GPL and supports the Linux operating systems, Solaris, BSD, MacOS, QNX, Windows, Android, iOS. Also, there are customized implementations for a variety of Linux-based … [Read more...]
What is a Virtual Private Network (VPN)?
This is a recap from our previously published articles to briefly describe Virtual Private Network (VPN) in easy langugage. Nowadays, VPN services for Windows are extremely popular. Many inexperienced users understand VPN as a magic key for accessing blocked web resources: they clicked the button, and the site opened. Yes, unblocking websites is one of the VPN functions, but not the most important … [Read more...]
HTTP vs MQTT for IoT Devices
Regular readers definitely noticed that in our IBM Watson IoT example codes for ESP32 Arduino, we have used both MQTT and HTTP. Also we talked about HTTP POST method. HTTP POST is easy, is not it? It is really easy to write code for Arduino to construct HTTP POST request. Because all of us more or less used with HTTP based API and cURL. It will appear that as MQTT is complex and HTTP is better to … [Read more...]
HTTP/3 : The Next Protocol After HTTP/2 and HTTP
The word HTTP/3 will astonish many as HTTP/2 yet not widely adapted (34% world adoption rate). HTTP/3 or HTTP-over-QUIC is the next protocol after HTTP/2 and HTTP 1. HTTP/3 will be a combination of SSL and TCP. HTTP/3 will use QUIC for transport. HTTP/3 will be the third major version of the Hypertext Transfer Protocol and based on previous RFC draft "Hypertext Transfer Protocol (HTTP) over QUIC". … [Read more...]
Visual Paradigm : A Tool to Create Illustration of Different Things
Visual Paradigm is a Nice Tool to Create Illustration of Different Things With Free Tier of Usage. You can create infographics, circuit diagram, flow charts, data visualization. Officially, it is an UML (Unified Modeling Language) CASE (Computer-aided software engineering) tool supporting UML 2, SysML and Business Process Modeling Notation (BPMN). There are several other such software, some of … [Read more...]
What is Zigbee? What Are the Differences Between LoRa and Zigbee
What is Zigbee? ZigBee is a personal-area network standard. ZigBee specification considered as an alternative to Wi-Fi and Bluetooth for some applications. Unlike LoRa and Wi-Fi, multiple central controllers can be used for Zigbee. Zigbee is the name of the specification of a set of high-level wireless communication protocols for use with low-power digital broadcasting, based on the IEEE 802.15.4 … [Read more...]
What is LoRa? What Are the Differences Between LoRa and WiFi
What is LoRa? What Are the Differences Between LoRa and WiFi? WiFi is limited in range, consume huge battery. LoRa is specially designed for the IoT devices. LoRa stands for Long Range. LoRa gives long-range transmissions of more than 10 km in rural areas with low power consumption. It is a patented wireless data communication technology developed in 2012. LoRa is a wireless communication standard … [Read more...]
What is Network Time Protocol (NTP)
In a previous guide on ESP32, we faced NTP server and Network Time Protocol to get current time for button press event as example. What is Network Time Protocol (NTP)? The Network Time Protocol (NTP) is a standard for synchronizing clocks in computer systems using UDP protocol. NTP is specifically designed to provide reliable time information over variable packet delay networks. In common usage, … [Read more...]
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