Concise definitions on frequent terms


  12/06/13 19:07, by admin, Categories: Networks

A modulator-demodulator is a device used to transmit digital data over an analog channel. It modulates/demodulates a carrier signal in order to encode digital information onto it.

A modem is typically used to transmit computer data over POTS phone lines.


  10/03/09 21:14, by sandeepbk, Categories: Imaging

The Joint Photographic Experts Group (JPEG) algorythm is a very commonly used method of compression for photographic images. It is also a file format used for storing or transmitting photos.

The JPEG algorythm is lossy which means some details of the original picture are lost when compressing the algorythm. The algorythm has a quality setting allowing to set a balance between smaller file size and better quality.


  08/26/08 07:17, by admin, Categories: Networks

Frame-based computer networking technology used in local area networks (LANs). Ethernet defines wiring and signaling for the physical layer, and frame formats and protocols for the media access control (MAC)/data link layer of the OSI model. Ethernet is mostly standardized as IEEE 802.3.

It has become the most widespread LAN technology since the 1990s.


  02/20/11 00:39, by admin, Categories: Imaging

Adobe Photoshop is the most widely used photo editing software in the world.

It is also heavily used by graphic designers to create logos, buttons and other graphics for web sites.

Bounce Rate

  09/24/13 22:55, by admin, Categories: Marketing

The bounce rate is the percentage of visitors who leave a web site after viewing a single page.

This is widely regarded as a bad thing because it may mean that visitors did not find what they were looking for and "bounced" away to another site. They left almost immediately.

However, this is a broken metric in many cases. For example if you were looking for opening times of a retailer in your city and you found that info right on the homepage of the retailer, you will technically leave the site after a single page view. However it does not mean you did not find what you were looking for.

Furthermore you may have visited some competing sites in a row, "bouncing" from on e to the next, still finding the exact information (closing times) on each of them in a single page view each.


  08/26/08 01:54, by admin, Categories: Imaging

Term used for a toner usage measurement on laser printing. For example, 5% coverage means that an A4 sided paper has about 5% image or text on it. So, if the paper or original has complicated images or lots of text on it, the coverage will be higher and at the same time, a
toner usage will be as much as the coverage.

Bootstrap Protocol (BOOTP)

  08/26/08 01:50, by admin, Categories: Networks

A network protocol used by a network client to obtain its IP address automatically. This is usually done during the bootstrap process of computers or operating systems running on them. The BOOTP servers assign the IP address from a pool of addresses to each client. BOOTP enables 'diskless workstation' computers as well as other networked devices (printers...) to obtain an IP address prior to loading any advanced operating system.


  12/06/13 18:24, by admin, Categories: Imaging

The Tagged Image File Format (TIFF) is a non compressed bitmap image format, typically produced by scanners.

TIFF images typically include tags defining the characteristics of the image that is included in the file.


  08/26/08 01:44, by admin, Categories: Networks

AppleTalk is a proprietary suite of network protocols developed by Apple. It was included in the original Macintosh (1984) but is now deprecated by Apple in favor of TCP/IP.

Internet Service Provider (ISP)

  02/20/11 00:31, by admin, Categories: Networks

An Internet Service Provider is a company that lets you access the Internet from your home or office by using a DSL modem, a cable modem or any other device (including sattelite links, etc.).

They are a gateway between the connection that goes into your home/office and the rest of the Internet.

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