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  • Types of computers

    Types of computers There are several families of computers, depending on their format: Mainframes, computers which a great deal of computing power, enormous input-output capabilities and high level of reliability. Mainframes are used by ... Read more

    Computer
    November 1, 2012 at 04:13 PM
  • 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
  • Cathode Ray Tube monitor (CRT)

    Cathode ray tube monitor Most monitors (computer screens) use cathode ray tubes (or CRT for short), which are glass vacuum tubes into which an electron gun emits a flow of electrons guided by an electrical field towards a screen covered in ... Read more

    Computer
    April 28, 2009 at 10:40 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
  • Client/Server Environment

    Introduction to Client/Server Architecture Numerous applications run in a client/server environment, this means that client computers (computers forming part of the network) contact a server, generally a very powerful computer in terms of ... Read more

    Client/Server
    October 16, 2008 at 09:43 AM
  • Introduction to Spreadsheet Concepts

    What is a Spreadsheet? A spreadsheet (or spreadsheet program) is software that permits numerical data to be used and to perform automatic calculations on numbers contained in a table. It is also possible to automate complex calculations by ... Read more

    Spreadsheet
    October 16, 2008 at 09:43 AM
  • Private-key (or secret-key) cryptography

    Symmetric encryption Symmetric encryption (also called private-key encryption or secret-key encryption) involves using the same key for encryption and decryption. ... Read more

    Cryptography
    October 16, 2008 at 09:43 AM
  • Linux - The Vi editor

    Introduction to Vi Despite its very limited ergonomics, Vi i is one of the most popular text editors texte under Unix type systems (with Emacs and pico). Under Linux, there is a free version of Vi called Vim (Vi Improved). Vi (pronounced ... Read more

    Linux
    October 16, 2008 at 09:43 AM
  • User management in Windows NT

    The notion of a user Windows NT is an operating system which manages sessions, meaning that when the system is started, it is necessary to log in with a user name and password. When Windows NT is installed, the administrator account is ... Read more

    Windows NT (XP,Vista,...)
    October 16, 2008 at 09:43 AM
  • Introduction to Wi-Fi (802.11 or WiFi)

    Introduction to Wi-Fi (802.11) The IEEE 802.11 specification (ISO/IEC 8802-11) is an international standard describing the characteristics of a wireless local area network (WLAN). The name Wi-Fi (short for "Wireless Fidelity", sometimes ... Read more

    Wifi
    October 16, 2008 at 09:43 AM
  • Computer - Introduction to Memory

    The Role of Memory The term "memory" applies to any electronic component capable of temporarily storing data. There are two main categories of memories: internal memory that temporarily memorises data while programs are running. Internal ... Read more

    Computer
    November 1, 2012 at 04:15 PM
  • Terms of Use for CCM.net

    Preface These terms of use have been written in order to inform users of the site of its conditions of use, in particular for using of communications services (such as the bulletin board) which let users the world over, ... Read more

    Terms of Use
    June 13, 2016 at 11:49 AM
  • FTP protocol (File Transfer Protocol)

    Introduction to FTP protocol FTP protocol (File Transfer Protocol) is, as its name indicates a protocol for transferring files. The implementation of FTP dates from 1971 when a file transfer system (described in RFC141) between MIT ... Read more

    Internet (protocols)
    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
  • Office Automation - Introduction

    What is office automation? Office suite tools What is office automation? The term office automation refers to all tools and methods that are applied to office activities which make it possible to process written, visual, and sound data in ... Read more

    Office software
    October 29, 2013 at 05:55 PM
  • 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
  • OOP - Data encapsulation

    The concept of encapsulation Encapsulation is a way of organizing data and methods into a structure by concealing the the way the object is implemented, i.e. preventing access to data by any means other than those specified. Encapsulation ... Read more

    Object-Oriented Programming
    October 16, 2008 at 09:43 AM
  • WiMAX - 802.16 - Worldwide Interoperability for Microwave Access

    What is WiMAX ? WiMAX is short for Worldwide Interoperability for Microwave Access. It is a metropolitan wireless standard created by the companies Intel and Alvarion in 2002 and ratified by the IEEE (Institute of Electrical and ... Read more

    Wimax
    October 16, 2008 at 09:43 AM
  • CCM - Who we are

    Welcome to We are France's number one tech website (CommentCaMarche.net). Every day, millions of users around the world read our news, tips, reviews on downloads, and ... Read more

    About Us
    July 13, 2017 at 06:41 PM
  • Hardware Interrupts (IRQ) and Conflicts

    The Concept of Interrupts DMA Base Addresses Hardware Conflicts IRQ Configuration Resolving Hardware Conflicts The Concept of Interrupts Because the processor cannot simultaneously process several pieces of information (it processes one ... Read more

    Computer
    October 29, 2013 at 04:33 PM