Active Directory is a distributed multimaster replicated database. All domain controllers host a full replica of the domain information for its own domain. Domain controllers in Windows 2000 and Windows Server 2003 environments hold a read/write copy of the Active Directory database. In these environments, changes can be made to the Active Directory database on …
A PCI simple communications controller is a software component found on a computer that controls the PCI connected devices plugged into that computer. PCI (Practical Communication Interface) is a hardware component built into the computer that allows a wide variety of devices to physically connect to the computer via individual card slots. While the PCI …
POTS (Plain Old Telephone Service), also known as PSTN (Public Switched Telephone Service), refers to the dominant telephone service in most residential and small business environments. A telephone company controls POTS, which allows consumers to make and receive calls on one line at a time. POTS differs from PBX, T-1, T-3, ISDN, VOIP, and other …
SCADA (Supervisory Control and Data Acquisition) is a system that collects data from various sensors at a factory, plant, or in other remote locations and sends this data to a central computer that then manages and controls the data. SCADA is a term that is used broadly to portray control and management solutions in a …
To change your Unix password, use the `passwd` command. Unless you are the “root” user, you will need to know your current password to set a new one. If you have forgotten your current password, you will need to contact the “root” user to have your password reset. Here is an example of the user …
The term algorithm is used in a variety of fields, including mathematics, computer programming, and linguistics. Its most well-accepted definition is something that consists of a finite list of instructions (which are well defined) that can be used to accomplish a task. Basically, when an algorithm is given some initial state, it will use the …
There is no “one” best satellite dish. The best satellite dish for you depends upon several factors. Satellite Dish Size The larger the satellite dish, the better it will receive signals. Therefore, the largest satellite dish available is always the best satellite dish — except that few of us want a nine foot satellite dish …
The Data Link Layer is layer two of the OSI model. It resides above the Physical Layer and below the Network Layer. The Data Link Layer is responsible for communications between adjacent network nodes. Hubs and switches operate at the Data Link Layer. The Data Link Layer is logically divided into two sub-layers: The Media …
Multimedia is simply multiple forms of media integrated together. Media can be text, graphics, audio, animation, video, data, etc. An example of multimedia is a Mozart web page that has text regarding the composer, an audio file of some of his music, and even a video of his music being played in a hall. Besides …
HSL (Hue, Saturation, and Lightness) is a method for describing colors. HSL is also known by the abbreviations of HLS and HIS, while the L can often refer to luminosity or luminance rather than light. The HLS color model is graphically represented by a double cone or hexcone, this shape resembles a spinning top. The …