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  • OOP - Inheritance

    The concept of inheritance Inheritance is specific to object-oriented programming, where a new class is created from an existing class. Inheritance (often referred to as subclasses) comes from the fact that the subclass (the newly created ... Read more

    Object-Oriented Programming
    October 16, 2008 at 09:43 AM
  • RTP/RTCP protocols

    Document written by Nico VanHaute, Julien Barascud and Jean-Roland Conca Introduction: What are RTP and RTCP? The spread of computers, added to the availability of cheap audio/video computer hardware, and the availability of higher ... Read more

    Internet (protocols)
    October 16, 2008 at 09:43 AM
  • The Printer

    Printers Characteristics Daisy Wheel Printer Dot-Matrix Printer Inkjet Printer and Bubble Jet Printer Laser Printer LED Printer Printer Command Language Print Servers Printers The printer is a peripheral that allows you to make a print-out ... Read more

    Computer
    November 7, 2012 at 08:26 AM
  • NAT- Network address translation, port forwarding and port trigg

    The principle of NAT Network address translation or NAT was developed in order to respond to the shortage of IP addresses with IPv4 protocol (in time the IPv6 protocol will respond to this problem). In fact, in IPv4 addressing the number ... Read more

    Internet (protocols)
    October 16, 2008 at 09:43 AM
  • Operating system

    Description of the operating system Roles of the operating system Components of the operating system Multi-threaded systems Multi-processor systems Embedded systems Real time systems Types of operating system Description of the operating ... Read more

    Operating System
    March 15, 2018 at 03:48 PM
  • Modem

    A quick history of the modem The first coding to enable long distance communication was Morse, which was developed by Samuel F.B Morse in 1844. This code is made up of dots and dashes (a sort of binary language...) and made it possible to ... Read more

    Internet Technologies
    October 16, 2008 at 09:43 AM
  • Environment variables

    Environment variables An environment variable is a dynamic value loaded into the memory that can be used by several processes operating simultaneously. On most operating systems, the location of some libraries or of the main system ... Read more

    Operating System
    October 16, 2008 at 09:43 AM
  • E-mail scams - Fund transfer scams

    Scams A "scam" is a fraudulent practice of African origin that involves extorting funds from internet users by enticing them with a sum of money and promising them a share of it. The use of scams originated in Nigeria, which has also given ... Read more

    Attacks
    October 16, 2008 at 09:43 AM
  • autorun - autorun.exe

    autorun - autorun.exe The process autorun.exe (autorun) is a generic Windows 98/NT/Me/2000/XP process which automatically runs a program from a CD-ROM when the CD is inserted in the disk drive. The process autorun is not in any way a virus ... Read more

    Windows processes
    October 16, 2008 at 09:43 AM
  • DNS (Domain Name System)

    What is DNS? Each computer directly connected to the Internet has at least one specific IP address. However, users do not want to work with numerical addresses such as 194.153.205.26 but with a domain name or more specifically addresses ( ... Read more

    Internet (protocols)
    October 16, 2008 at 09:43 AM
  • Introduction to DOS

    The development of MS-DOS MS-DOS is the most well known operating system, the most commercialised version is that of Microsoft, christened "MS-DOS" (there are other versions such as DR-DOS). MS-DOS was created in 1981 when it was used on ... Read more

    MS Dos
    March 15, 2018 at 03:24 PM
  • Hard drive

    The role of the hard drive Structure How it works Block mode 32-bit mode Technical specifications The role of the hard drive The hard drive is the component which is used to permanently store data, as opposed to RAM, which is erased ... Read more

    Computer
    November 7, 2012 at 09:23 AM
  • Routing over the Internet

    Routers Routers are devices which make it possible to "choose" the path that datagrams will take to arrive at the destination. They are machines with several network interface cards each one of which is linked to a different network. So, ... Read more

    Internet (protocols)
    May 24, 2012 at 03:36 PM
  • Telnet protocol

    Introduction to the Telnet protocol The Telnet protocol is a standard internet protocol enabling terminals and applications to interface over the Internet. This protocol provides the basic rules making it possible to link a client (system ... Read more

    Internet (protocols)
    October 29, 2012 at 03:45 PM
  • The GPRS standard

    Introduction to the GPRS standard The GPRS (General Packet Radio Service) standard is an evolution of the GSM standard, and for that reason is sometimes called GSM++ (or GMS 2+). As it is a second-generation telephony standard that allows ... Read more

    Mobile phones
    October 16, 2008 at 09:43 AM
  • The GSM standard

    Introduction to the GSM standard The GSM (Global System for Mobile communications) network is, at the start of the 21st century, the most commonly used mobile telephony standard in Europe. It is a so-called "second generation" (2G) ... Read more

    Mobile phones
    October 16, 2008 at 09:43 AM
  • Positioning elements in CSS

    Using style sheets along with the and tags, you can specify the location of text or images down to the pixel. This is possible with versions 4 and higher of Netscape and Internet Explorer; however, the technique is still problematic and may ... Read more

    CSS
    October 16, 2008 at 09:43 AM
  • FTP commands

    The FTP protocol FTP (File Transfer Protocol) is a protocol — meaning a standard language that lets two machines communicate — used so that computers of different types (or with different operating systems) can transfer files over a ... Read more

    Networking tools
    October 16, 2008 at 09:43 AM
  • Data transmission - Analogue transmission

    The principles of analogue transmission Analogue data transmission consists of sending information over a physical transmission medium in the form of a wave. Data is transmitted via a carrier wave, a simple wave whose only purpose is to ... Read more

    Data transmission
    October 16, 2008 at 09:43 AM
  • Using Telnet

    Introduction to Telnet Protocols and implementation Running Telnet Commands in Telnet Introduction to Telnet Telnet is a protocol for emulating a remote terminal, which means that it can be used to run commands entered on a keyboard at a ... Read more

    Internet Utilities
    November 12, 2012 at 12:39 PM