InformationDesign-Assignment#7

Network Keyterm - 4

**DDR**

1. Short for Double Data Rate, DDR is a type of memory that utilizes both the rising and falling edge of the system clock that has the potential of doubling the speed of the memory. Today, the DDR technology can be found in high end Video Cards as well as computer memory such as DDR-SDRAM.
2. Short for Dial-on-Demand Routing, DDR was developed by Cisco and is a new routing technique that uses existing telephone lines to help form a WAN.
3. DDR is also short for Dance Dance Revolution. A popular arcade and console game where users must dance on a pad in conjunction with what is being displayed on the screen.

Source: http://www.computerhope.com/jargon/d/ddr.htm

**DNS**

Short for Domain Name System or Domain Name Service, a DNS is an Internet or other type of network server that helps to point domain names or the hostname to their associated IP address that was introduced by Paul Mockapetris and Jon Postel in 1984. If a domain name is not found within the local database, the server may query other domain servers to obtain the address of a domain name.

• For example, when a user is accessing the Computer Hope domain a user would enter the easy to remember domain: computerhope.com. When entered that domain name is looked up on a Domain Name System to translate that name into an IP address that can be better understood by computer, e.g. 204.288.150.3. Using that IP address the computers can then find the computer containing the Computer Hope web page and forward that information to your computer.

Source: http://www.computerhope.com/jargon/d/dns.htm

**DOS**

1. Short for Disk operating system, DOS is an acronym often used to describe MS-DOS.
2. Short for Disk operating system, DOS refers to any type of operating system that runs from a disk drive. Today all operating systems could be considered disk operating systems.
3. Short for Denial of Service, a DoS attack is a form of attacking another computer or company by sending millions or more requests every second causing the network to slow down, cause errors or shut down. Because it is difficult for a single individual to generate a DoS attack, these forms of attacks are often created from another company or college and/or worms are created to create zombie computers to create a DoS attack.

Source: http://www.computerhope.com/jargon/d/dos.htm

**DSL**

Short for Digital Subscriber Line, DSL is a method for home users and small businesses to have high speed access to the Internet over standard copper lines. Capable of receiving up to 6.1 megabits per second, DSL is a great solution providing it is available in your area. Because of the technology used, you must be within a certain distance from your phone company's CO for DSL to work or be available.

Source: http://www.computerhope.com/jargon/d/dsl.ht m

**Download**

Sometimes abbreviated as dl, download is a term used to describe the process of retrieving data from another computer, either over a network or modem. Each page you visit on the Internet you download to your computer first. The term download is often associated with downloading a software program from the Internet that can be installed and ran on your computer.

• Additional help and information about how to download a file on the Internet can be found on document CH000505.
• See document CH000839 for information about why a download may fail before being completed and what can be done. See our download page for available downloads through Computer Hope.

Source: http://www.computerhope.com/jargon/d/download.htm