Concise definitions on frequent terms

Automatic Document Feeder (ADF)

  08/26/08 01:43, by admin, Categories: Imaging

An Automatic Document Feeder (ADF) is a mechanism that will automatically feed an original sheet of paper so that a printer can scan some amount of the paper at once.

Subnet Mask

  12/06/13 19:00, by admin, Categories: Networks

The subnet mask is used in conjunction with the network address to determine which part of the address is the network address and which part is the host address.

A subnet mask may look like 255.255.255.0 which means the first 3 bytes are part of the network and the last byte is the address of the host on the subnet.

Another way to write the same network mask as above is /24 which means the 24 first bits (8 bits * 3 bytes) are part of the network.

Modem

  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.

Intranet

  10/03/09 20:27, by sandeepbk, Categories: Networks

An Intranet is a network using the same protocols of the public Internet but on a private scale, within an organization.

For example a company may have an intranet for sharing informations between employees. That information would not be accessible outside of the company.

Dual Inline Memory Module (DIMM)

  08/26/08 02:01, by admin, Categories: Uncategorized

A small circuit board that holds memory.

EtherTalk

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

A suite of protocols developed by Apple for computer networking. It was included in the original Macintosh (1984) and is now deprecated by Apple in favor of TCP/IP networking.

Duty Cycle

  08/26/08 02:04, by admin, Categories: Imaging

Duty cycle is the page quantity which does not affect printer performance for a month. Generally the printer has the lifespan limitation such as pages per year. The lifespan means the average capacity of print-outs, usually within the warranty period. For example, if the duty cycle is 48,000 pages per month assuming 20 working days, a printer limits to 2,400 pages a day.

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.

JPEG or JPG

  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.

WPA-PSK

  12/06/13 18:15, by admin, Categories: Networks

WPA-PSK (WPA Pre-Shared Key) is special mode of WPA for small business or home users.

A shared key, or password, is configured in the wireless access point (WAP) and any wireless laptop or desktop devices. WPA-PSK generates a unique key for each session between a wireless client and the associated WAP for more advanced security.

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