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  • Types of networks

    Different types of networks LAN MANs WANs Different types of networks Different types of (private) networks are distinguished based on their size (in terms of the number of machines), their data transfer speed, and their reach. Private ... Read more

    Introduction to Networks
    October 29, 2013 04:11 PM
  • Terms of Use for

    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

    User guide
    February 23, 2016 11:18 PM
  • Spreadsheet - Formulas

    Introduction to Formulas The main use of a spreadsheet is to automate calculations, which means using cells to perform operations based on values in other cells. The spreadsheet recalculates all the values each time a change is made to the ... Read more

    October 16, 2008 09:43 AM
  • Data transmission - Transmission modes

    Transmission modes A given transmission on a communications channel between two machines can occur in several different ways. The transmission is characterised by: the direction of the exchanges the transmission mode: the number of bits ... Read more

    Data transmission
    November 8, 2012 12:42 PM
  • Computer bus - What is it?

    Definition Characteristics Architecture The primary buses Chipset Definition A bus, in computing, is a set of physical connections (cables, printed circuits, etc.) which can be shared by multiple hardware components in order to communicate ... Read more

    October 29, 2013 04:32 PM
  • How email works (MTA, MDA, MUA)

    Email, as simple as it is to use, relies on a more complicated set of operating procedures than that of the Web. For most users, its operation is transparent, which means that it is not necessary to understand how email works in order to ... Read more

    October 16, 2008 09:43 AM
  • The concept of networks

    What is a network? The generic term "network" refers to a group of entities (objects, people, etc.) which are connected to one another. A network, therefore, allows material or immaterial elements to be circulated among all of these ... Read more

    Introduction to Networks
    October 16, 2008 09:43 AM
  • Structure of an email (Headers and bodies)

    Structure of an email An email has three basic parts: The header, a set of lines containing information about the message's transportation, such as the sender's address, the recipient's address, or timestamps showing when the message was ... Read more

    October 16, 2008 09:43 AM
  • Networking - 3-Tier Client/Server Architecture

    Introduction to 2-Tier Architecture 2-tier architecture is used to describe client/server systems where the client requests resources and the server responds directly to the request, using its own resources. This means that the server does ... Read more

    October 16, 2008 09:43 AM
  • DTS (Digital Theater Sound)

    DTS standard More information DTS standard DTS (Digital Theater Sound) is a digital sound coding standard created by Universal. Compared with the Dolby Digital standard, DTS uses four times less compression and digitises sound at 20 bits ... Read more

    November 12, 2012 02:14 PM
  • Creating an RJ45 crossover cable

    What's an RJ45 plug? A network card may have several types of connectors, with the most common being: An RJ45 connector; A BNC connector (coaxial cable). The RJ-45 is the one which interests us here, as it it the most widely used. The ... Read more

    Cables and connectors
    October 16, 2008 09:43 AM
  • Introduction to e-Commerce (electronic commerce)

    Introduction to e-Business The term "Electronic commerce" (or e-Commerce) refers to the use of an electronic medium to carry out commercial transactions. Most of the time, it refers to the sale of products via Internet, but the term ... Read more

    October 16, 2008 09:43 AM
  • Serial port and parallel port

    Serial ports are generally built into the mother board, which is why the connectors behind the casing and connected to the mother board by a wire cable can be used to connect an exterior element. Serial connectors generally have 9 or 25 ... Read more

    July 16, 2015 11:47 AM
  • WiFi modes of operation (802.11 or Wi-Fi)

    There are several kinds of hardware that may be used to implement a WiFi wireless network: Wireless adapters or network interface controllers (NICs for short) are network cards with the 802.11 standard which let a machine connect to a ... Read more

    October 16, 2008 09:43 AM
  • Creating a local area network

    Why set up a local area network? When you have several computers, it can be convenient to connect them to each other to create a local area network (LAN). Setting up such a network costs very little, contrary to what people may think. Here ... Read more

    Network configuration
    October 16, 2008 09:43 AM
  • Data transmission - Cabling

    Cabling types Coaxial cable Transceiver: the connection between Thinnet and Thicknet Coaxial cable connectors Twisted pair cabling Unshielded Twisted Pair (UTP) Shielded Twisted Pair (STP) Twisted pair connectors Fibre optics Cabling types ... Read more

    Data transmission
    November 7, 2012 08:25 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 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

    October 16, 2008 09:43 AM
  • Leased lines (T1, T2, T3)

    Leased lines "Leased" lines enable transmission of data at medium and high speeds (64 Kbps to 140 Mbps) by point to point or multipoint connection (Transfix service). In Europe, there are five types of lines distinguished according to ... Read more

    Internet Technologies
    October 16, 2008 09:43 AM
  • Spreadsheet - Functions

    The Concept of a Function Spreadsheets generally have a large number of integrated functions for processing data. There are hundreds, categorised as follows: Arithmetic functions that offer basic tools to process numerical data Statistical ... Read more

    October 16, 2008 09:43 AM