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How Laser Communications Work in Space and What Makes the Links Reliable

When NASA’s Artemis II astronauts traveled around the Moon in April 2026, radio was not their only connection to Earth. A laser communications terminal aboard Orion exchanged 484 GB of data during the 10-day mission, reaching downlink speeds of 260 Mbps. It was the first laser communications system flown on a crewed deep-space mission. Artemis

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How SD-WAN Simplifies Network Management

Technology / By Dave

The rapid evolution of technology has redefined how businesses manage their networks. Traditional WAN architectures, expensive and complex, face increasing demands for flexibility and agility. Organizations are seeking solutions that improve performance and optimize operational efficiency. Software-Defined Wide Area Networking (SD-WAN) provide robust management capabilities that far exceed those of conventional WANs. By leveraging centralized

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7 useful functions that a network RaspberryPi can do (FTP-TFTP-WEB-SAMBA-SYSLOG-RADIUS-DHCP)

Technology / By Dave

Let’s see how to set up a Raspberry Pi to use it as a server on your local network. Below you will find a list of commands and actions to perform step by step to configure the device. [1] SERVER FTP mkdir -p /home/pi/files/ chmod 777 /home/pi/files/ sudo bash apt-get install pure-ftpd -y pure-pw useradd pi

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Node.js Vs Python: What’s the Difference?

Technology / By Dave

Node.js and Python are two of the best back-end technologies. There are no “better” or “worse” programming languages, according to popular belief, and it all relies on the tastes of each developer. Node.js Node.js is a server-side platform based on the JavaScript Engine in Google Chrome. It employs an event-driven, non-blocking I/O architecture. It enables

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How to clean the Spotify cache to free disc space

Technology / By Dave

The latest version of Spotify has seen a big change in its graphical interface, and you can no longer find the button to manually clear all the cache of the files you listen to and download. After some time listening to streaming music, you may need to delete the old temporary files that the program

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How to calculate hash MD5-SHA1-SHA-256-CRC32 in Windows Linux Mac and online

Technology / By Dave

What they are Hash are used in computer science to map a string (a sequence of bits) of arbitrary length into a string of predefined length. It is a sort of ‘signature’ of an electronic document. For each string you can calculate a hash, so each different string will have different hashes. However, calculating the

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How to change the MAC address to the network card on Windows

Technology / By Dave

The MAC address (or MAC Address) is used by network cards to identify themselves in the exchange of information. MAC stands for Media Access Control and consists of a 6 byte (48 bit) long code. It is assigned by the manufacturer of the card at the time of its creation and is unique for each

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Solar activity in real time with SOHO (NASA ESA NOAA)

Space / By Dave

SOHO – Solar and Heliospheric Observatory EIT 304 EIT 195 EIT 171 EIT 284 LASCO C2 LASCO C3 H-Alpha H-Alpha Contrasted Nobeyama 17 GHz Magnetogram 525.02nm (Fe I) Solar X-rays Geomagnetic Field X-Ray flux Electron flux Proton flux Magnetometer Satellite Environment SOLAR WIND Total Electron Content (TEC) Latest 48h of photon data Solar

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How to create a safe and easy to remember password

Technology / By Dave

They say that the most used passwords are always the same (example: 123456, password, qwerty, etc. …), or in any case referable to birth dates or memorable moments of someone’s life. Well, using public characters or real places is not a good idea anyway: in fact there are some software (like John the Ripper) that are able to use huge dictionaries,

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The ten most used (and not to be used) passwords

Technology / By Dave

How do I choose a password? There are many combinations, some more efficient, some less so; those that reminds us of our real lives should definitely be avoided. Google’s message is clear: “Man’s best friend (the dog) does an exemplary job in protecting your home – so begins an article by Fox Van Allen, writing

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