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CGS 2100c test 2 abdallah
CGS 2100c test 2 abdallah
55
Computer Science
Undergraduate 1
10/24/2007

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Term

kernal

Definition
The core module of an operating system that typically manages memory, processes, tasks, and storage devices.
Term
boostrap program
Definition
a program stored in ROM that loads and initializes the OS
Term
File allocation table (FAT)
Definition
table established by the OS for all files stored on any storage medium
Term
multithreading
Definition
a technology that allows multiple parts or threads from a programto run simultaneously
Term
Client server networks
Definition
use one or several servers
Term
CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
Definition
a method of responding to an attempt by two devices to use a data channel simultaneously. (ethernet protocol)
Term
drive mapping
Definition
a process of assigning a drive letter to a storage devce located on a different network workstation
Term
Bandwidth
Definition
a data transmission capacity of communications channel. Digital signals are measured in bits per second, analog are in hertz.
Term
broadband
Definition
high bandwith
Term
narrowband
Definition
low banwidth
Term

latency

Definition
the elapsed time it takes for a packet of data to arrive to its destination
Term
multitasking OS
Definition
1-      provides processing and memory management services that allow two or more programs to run simultaneously
Term
Restore
Definition
a utility program that keeps track of your system configuration and files at a given date and allows you to configure your system exactly like it was then
Term
logical storage model
Definition
a visual or conceptual aid that helps a computer user visualize a storage file system
Term
physical storage model
Definition
a representation of data as it is physically stored
Term
file specification
Definition
a combo of the drive letter, subdirectory, file name, and extension that identifies a file aka path. (ex: C:\Word\Titties.doc)
Term
file extension
Definition
a set of letters and/or numbers added to the end of a file name that helps identify the contents or type
Term
backup
Definition
a duplicate copy of a file, disk, or tape also refers to a Windows utility that allows you to create and restore backups
Term
Before each back-up...
Definition
 you must run an up to date antivirus software
Term
network interface card (NIC)
Definition
a network circuitry required to connect to a LAN
Term
node
Definition
Each connection point on a network
Term
networked peripheral, or network-enabled peripheral
Definition
any device that contains network circuitry to directly connect to a network
Term
network device, or network appliance
Definition
any electronic device that broadcasts network data, boosts signals, or routes data to its destination
Term
router
Definition
intended to work on LANs to monitor and direct packets being transported from one device to another
Term
routable IP address
Definition
one which can be accessed by packets on the Internet
Term
router
Definition
a device found at each intesection on the internet backbone that examines the IP address o incoming data, and fowards the data towards its destination
Term
network hub
Definition
a network device that connects several nodes of a Local Area Network
Term
gateway
Definition
a network device that connects two dissimilar networks even if the networks use different protocols
Term
bridge
Definition
a device that connects two similar networks by simply transferrring data without regard to the network format
Term
modem
Definition
a device that modulates and demodulates a signal, typically used to send data from a computer to the internet over telephone, cable television, or satellite networks
Term
handshaking
Definition
a process where a protocol helps 2 network devices communicate
Term

Encryption

Definition
the process of scrambling or hiding information so that it cannot be understood without the key necessary to change it back to its original form
Term
(PKE)

Public key encryption

Definition
an encription method that uses a pair of keys, a public key (known to everyone), and a private key (known only to the recipient) that decrypts it
Term
LAN
Definition
(Local area network) An interconnected group of computers and peripherals located within a relatively limited area, such as a building or campus
Term
MAN
Definition
(metropolitan area network) A public, high-speed network that can transmit voice and data thin a 50-mile range
Term
WAN
Definition
(wide area network) An interconnected group of computers and peripherals that covers a large geographical area, such as mutiple branches of a corporation
Term
Circuit switching
Definition
a method used by the telephone network to temporarily connect one telephone with another for the duration of a call
Term

Packet switching

Definition
a technology used by data communications networks, such as the internet, where a message is divided into smaller units called "packets" for transmission
Term
Access rights of an FTP site...
Definition
can be configured in various ways to allow or prevent changing file names uploading files or deleting files
Term
ISP (Internet Service Provider)
Definition
1-      operates routers, communications equipment, and other network devices that handle the physical aspects of transmitting and receiving data between their subscribers and the Internet
Term
T1, T3, and T4 lines
Definition
are leased from the telephone company, and offer fast, high-capacity data transmission
Term
Coaxial cable
Definition
an electrical cable consisting of a round conducting wire, surrounded by an insulating spacer, surrounded by a cylindrical conducting sheath, usually surrounded by a final insulating layer (jacket).
Term
fiber-optic cables
Definition
a glass or plastic fiber designed to guide light along its length
Term
TCP/IP
Definition
(Transmission Control Protocol/Internet Protocol) the primary protocol suite for transmitting messages over the internet
Term

Always-on connection

Definition
in the context of internet acces, a permanent connection, as opposed  a connection that is established and dropped as needed
Term
mobile internet access
Definition
any service that allows subscribers to access the internet on the go
Term

grid computing system

Definition
a network of diverse computers, such as PCs, Macs, workstations, and servers, in which each computer contributes processing resources to solve a single problem
Term
NAT
Definition
the process your router uses to keep track of packets and their corresponding private or public IP addresse
Term
Cellular ready PDA's:
Definition
Blackberry, Axim, IPAQ
Term
actual speed of a 56 Kbps modem
Definition
44 Kbps
Term
VoIP (Voice over IP)
Definition
hardware, software, and protocols used to make telephone-style calls over the internet
Term
ISDN (Integrated Services Digital Network
Definition
a type of fixed Internet connection that moves data at speeds of 64 Kbps or 128 Kbps over ordinary telephone lines
Term
DSL
Definition
a high-speed, digital, always-on Internet access technology that runs over standard phone lines
Term
Cable Internet service
Definition
distributes always-on broadband Internet access over the same infrastructure that offers cable television service
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