Case Study Vocab Part 1 of 3

Backup Software: A computer program used to perform a complete back up of a file, data, database, system or server. The back up software enables you to make an exact duplicate of everything contained on the original source. This software must also be used to perform a recovery of the data or system in the event of a disaster.
ie. Software that allows you to recover data or files stored on your system in the event of a computer crash or other event that corrupts data on your computer.

Broadband and Wireless Access:

Broadband Access:

• A high data rate Internet access—typically contrasted with dial-up access over a 56k modem. Dial-up modems are limited to a bit-rate of less than 56 kilo-bit/s (kilobits per second) and require the full use of a telephone line—whereas broadband technologies supply more than double this rate and generally without disrupting telephone use.
• ie. A alternative to dial up access over a phone line, broadband uses a different line and has a speed twice as fast as dial up.
  
• Bit-rate:
• The number of bits that are conveyed or processed per unit of time.
• Bits:
• a binary digit, taking a logical value of either "1" or "0". Binary digits are a basic unit of information storage and communication in digital computing.
• ie. the standard unit of data storage and it transfer rate
  
• Modem:
• A device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.
• ie. A device that regulates the encoding and decoding of transferred data.
  
• kilo-bit; one thousand bits

Wireless Access:

• Wireless Network:
• Any type of computer network that is wireless, and is commonly associated with a telecommunications network whose interconnections between nodes is implemented without the use of wires.
• ie. A network using wireless technology allowing you to log into the internet wirelessly.


• Node:
• an active electronic device that is attached to a network, and is capable of sending, receiving, or forwarding information over a communications channel.
• ie. A device that can send, recieve or forward data.


• Wireless Access Point:
• device that allows wireless communication devices to connect to a wireless network using Wi-Fi, Bluetooth or related standards
• ie. Using a wireless network to connect to a network

Client/Server Network: Distinguishes client systems from server systems, which communicate over a computer network. A client-server application is a distributed system comprising both client and server software. A client software process may initiate a communication session, while the server waits for requests from any client.
ie. A network in which a server provides services and acts as a central server for (client) computers.

CT Scanner: A medical imaging method employing tomography. Digital geometry processing is used to generate a three-dimensional image of the inside of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. Tomography: Imaging by sections or sectioning.
ie. A imager that uses X-rays to build a three dimensional image of an object by sections.

Data Redundancy: A property of some disk arrays (most commonly in RAID systems) which provides fault tolerance, so that all or part of the data stored in the array can be recovered in the case of disk failure.
ie. A process in which if a computer crashes; some of the data can be recovered.

RAID (Redundant Array of Inexpensive Disks) systems: A technology that allowed computer users to achieve high levels of storage reliability from low-cost and less reliable PC-class disk-drive components, via the technique of arranging the devices into arrays for redundancy.
ie. Computers that are able to recover data after crashing.

Disk Arrays: A disk storage system which contains multiple disk drives. It is differentiated from a disk enclosure, in that an array has cache memory and advanced functionality.
ie. multiple disk drives that store data in various forms.

Disaster Recovery: The process, policies and procedures related to preparing for recovery or continuation of technology infrastructure critical to an organization after a natural or human-induced disaster.
ie. Steps that are taken following a disaster to restore normal life and repair any damage sustained during the disaster or event, in this case the recovery of computer data and the repair of IT systems in the region.

Embedded IT systems: A special-purpose computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. It is usually embedded as part of a complete device including hardware and mechanical parts.
A system designed to perform only a few dedicated tasks, the system usually being included in a device containing hardware and other mechanical parts.

EMR- Electronic Medical Records: A medical record in digital format.

Failover Systems: The capability to automatically switch to a redundant or standby system, following the failure of the previously active system.
ie. Ability to automatically to a standby sytem following the crash of the active system.

File Server: A computer that is attached to a computer network and provides a location for shared files on a specific network, which can be accessed from any computer on said network.
ie. A computer in a network that offers a location for shared files to the rest of the computers on the network.

Firewall: A part of a computer system or network designed to block unauthorized access to the system or network. It is a set of devices programmed to permit, deny, encrypt, or decrypt computer traffic between different domains.

ie. A program/system design to block unauthorized acces to the computer or network it is protecting.