A virtual visit to the red planet, thanks to the incredible photo released by NASA. A very high resolution panoramic image, captured by the rover “Curiosity” and the result of an assemblage of 896 single photos taken on Mars between October and November 2012. The results are amazing. Here’s a tip: put it in full …
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 …
How to calculate hash MD5-SHA1-SHA-256-CRC32 in Windows Linux Mac and online Read More »
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 …
How to change the MAC address to the network card on Windows Read More »
Better. zip .7z or .rar? Often we don’t even pay attention to it, but when we click on a ‘zipper’ file, we are using sophisticated compression algorithms that over the years keep getting better and better. There are many algorithms and therefore compression formats: Zipper, Rar, GZip, BZip2, 7z, Tar, Tar.gz … Among the most popular on Windows we have: 7z, Zip and Rar. The first and the second one …
In some situations we may have to connect to a Wifi network that is not ‘visible’ from our homes. Especially on holiday, where we are forced to stand at the window to try to get a better signal from a public HotSpot. How to ‘repeat’ the signal picked up outside, in our house? We …
How to create a Wi-Fi hotspot in Windows 7 8 or Windows 10 in a few steps Read More »
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, …
How to create a safe and easy to remember password Read More »
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 …
The ten most used (and not to be used) passwords Read More »
DNS stands for Domain Name System, it is the protocol used globally for domain name translations. What does it mean? When we type in the name of a website (e.g. spaceclick.com) our computer sends a DNS request to an appropriate server to translate this name into an IP address (e.g. 105.0.0.155). And then it connects to that IP address …
What are DNS, how to configure and protect DNS on Windows Read More »
Punycode is an encoding system that serves to represent a sequence of unicode characters via an ASCII character sequence, to make it possible to use these sequences in domain names, without having to modify existing infrastructure and standards. In this way you can manage internationalized domain names (IDNA) by adding the characters ‘xn–‘ to the beginning of the punycode string. For example, by entering xn–google.com as address, we …
A computer or any device, when connected to a network (LAN), is identified by an IP address assigned by the router. This address is usually in the form 192.168.X.Y and it is released by the router’s DHCP to identify the various devices connected to it. However, since the router itself is connected to the Internet …
