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Operating Systems
IT 205 Final Globe University
90
Computer Science
Undergraduate 1
06/12/2011

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Term
802.11g
Definition
Wireless networking standard that operates in the 2.4GHz band w/a theoretical output of 54 Mbps and backward compatible with 802.11b
Term
802.11b
Definition
Wireless networking standard that operates in the 2.4GHz band w/a theoretical output of 11 Mbps
Term
802.11n
Definition
Wireless networking standard that operates in the 2.4GHz and 5.6GHz band and uses MIMO for a theoretical output of 100+ Mbps
Term
802.11a
Definition
Wireless networking standard that operates in the 5GHz band w/a theoretical output of 54 Mbps
Term
access control
Definition
Security concept using physical security, users and groups,authentication and security policies
Term
active partition
Definition
On a hard drive, primary partition that contains an operating system
Term
active partition
Definition
On a hard drive, primary partition that contains an operating system
Term
active partition
Definition
On a hard drive, primary partition that contains an operating system
Term
Add or Remove Programs
Definition
Applet that allows users to add or remove a program from the system
Term
administrative shares
Definition
Administrator tool to give local admins access to hard drives and system root folders
Term
Administrative Tools
Definition
Group of Control Panel applets, including Computer Management, Event Viewer, and Reliability and Performance Monitor
Term
Administrator Account
Definition
User account, created when the OS is first installed, that is allowed complete, unfettered access to the system without restriction
Term
Administrators group
Definition
List of members with complete administrator privileges
Term
Advanced Startup Options menu
Definition
Menu that can be reached during the boot process that offers advanced OS startup options, such as boot in Safe Mode or boot into Last Know Good Configuration
Term
adware
Definition
type of malicious program that downloads ads to a user's computer, generating undesirable network traffic
Term
Aero
Definition
The Windows Vista desktop environment. Aero adds some interesting aesthetic effects such as window transparency and Flip 3D
Term
antivirus program
Definition
Software designed to combat viruses by either seeking out and destroying them or passively guarding against them
Term
API(Application Programming Interface)
Definition
Software definition that describes operating system calls for application software; conventions defining how a service is invoked
Term
APIPA(Automatic Private IP Addressing)
Definition
Feature of windows that automatically assigns and IP address to the system when the client cannot obtain an IP address automatically
Term
APM(advanced power management)
Definition
BIOS routines that enable the CPU to turn selected peripherals on and off
Term
applet
Definition
generic term for a program in the Windows Control Panel
Term
ASR(automated system recovery)
Definition
Windows XP tool designed to recover a badly corrupted Windows system; similar to ERD
Term
ATTRIB.EXE
Definition
command used to view the specific properties of a file; can also be used to modify or remove file properties, such as read-only, system or archive.
Term
attributes
Definition
values in a file that determine the hidden, read-only, system and archive status of the file
Term
authentication
Definition
any method a computer uses to determine who can access it
Term
autodetection
Definition
process through which new disks are automatically recognized by the BIOS
Term
Automatic Updates
Definition
feature allowing updates to Windows to be retrieved automatically over the Internet
Term
AutoPlay
Definition
Windows2000/XP/Vista/7 setting, along with autorun.inf, enabling Windows to automatically detect media files and begin using them
Term
Backup or Restore Wizard
Definition
Utility contained within Windows that allows users to create system backups and set system restore points
Term
basic disks
Definition
hard drive partitioned in the "classic" way with a master boot record (MBR) and partition table
Term
baud
Definition
one analog cycle on a telephone line
Term
BIOS(basic input output system)
Definition
Classically, software routines burned onto the system ROM of a PC. More commonly seen as any software that directly controls a particular piece of hardware. A set of programs encoded in read-only (ROM) on computers. These programs handle startup operations and low level control of hardware such as disk drives, the keyboard and the monitor
Term
BitLocker Drive Encryption
Definition
Drive encryption software offered in Windows Vista/7 Ultimate and Enterprise Editions. BitLocker requires a special chip to validate hardware status and to ensure that the computer hasn't been hacked
Term
Boot
Definition
to initiate and automatic routine that clears the memory,loads the operating system, and prepares the computer for use.
Term
cold boot
Definition
Boot done when the computer is physically switched on
Term
warm boot
Definition
loads a fresh OS without turning of the computer, lessening the strain on the electronic circuitry - initiate by pressing CTRL-ALT-DELETE twice in rapid succession
Term
boot sector
Definition
first sector on a PC hard drive or floppy drive, track 0. boot-up software in ROM tells the computer to load whatever program is found there.
Term
BOOT.INI
Definition
text file used during the boot process that provides a list of all OSs currently installed and available for NTLDR. Tells where each OS is located on the system. Windows XP and earlier
Term
bootable disk
Definition
disk that contains a functional operating system; can also be a floppy disk, USB thumb drive, or optical disk
Term
bootstrap loader
Definition
segment of code in a system's BIOS that scans for an OS, looks specifically for a valid boot sector, and , when one is found, hands control over to the boot sector; then the bootstrap loader removes itself from memory
Term
bps(bits per second)
Definition
how fast data is moved from one place to another
Term
browser
Definition
program specifically designed to retrieve, interpret, and display Web pages
Term
BSoD (blue screen of death)
Definition
infamous error screen that appears when Windows encounters an unrecoverable error
Term
byte
Definition
8 bits
Term
CAB files
Definition
cabinet files. These files are compressed and most commonly used during OS installation to store many smaller files, such as device drivers
Term
cache(disk)
Definition
special area of RAM that stores the data most frequently accessed from the hard drive. Cache memory can optimize the use of your systems
Term
Cat 5e
Definition
Category 5e wire. TIA/EIA standard for UTP wiring that can operate up to 1 gigabit per second
Term
CD(CHDIR)
Definition
change directory . Allows you to change the focus of the command prompt from one directory to another
Term
certification
Definition
license that demonstrates competency in some specialized skill
Term
CHAP(Challenge Handshake Authentication Protocol)
Definition
common remote access protocol; serving system challenges the remote client, usually by means of asking for a password
Term
CHKDSK (Checkdisk)
Definition
hard drive error detection and to a certain extent, correction utility in Windows. Originally a DOS command, also the executable for the graphical Error-checking tool
Term
clean installation
Definition
OS installed on a fresh drive
Term
client
Definition
computer program that uses the services of another computer program. Software that extracts information from a server; also, a machine that accesses shared resources on a server
Term
client/server
Definition
relationship in which client software obtains services from a server on behalf of a person
Term
client/server network
Definition
network that had dedicated server machines and client machines
Term
cluster
Definition
basic unit of storage on a floppy or hard disk. multiple sectors are contained ina cluster
Term
CMOS(complementary metal-oxide semiconductor)
Definition
originally, the type of nonvolatile RAM that held info about the most basic parts of your PC, such as hard drives, floppies and amount of DRAM.
Term
CMOS setup program
Definition
program enabling you to access and update CMOS data
Term
command-line interface
Definition
user interface for an OS devoid of all graphical trappings
Term
compatibility modes
Definition
feature of Windows 2000 and beyond to allow software written for previous versions of Windows to operate in newer OSs
Term
CompTIA Network+ certification
Definition
vendor neutral, industry-wide certification for network technicians covering network hardware, installation and trouble shooting
Term
CompTIA A+ certification
Definition
Industry-wide, vendor-neutral computer certification program that demonstrates competency as a computer technician
Term
Computer Management
Definition
Applet in Windows' Administrative Tools that contains several useful snap-ins, such as Device Manager and Disk Management
Term
Control Panel
Definition
collection of Windows applets, or small programs, that can be used to configure various pieces of hardware and software in a system
Term
copy backup
Definition
type of backup similar to Normal or Full,in that all selected files on a system are backed up. This type of backup does not change the archive bit of the files being backed up
Term
COPY command
Definition
command in the command-line interface for making a copy of a file and pasting it in another location
Term
CPU(central processing unit)
Definition
"brain" of the computer. microprocessor that handles primary calculation for the computer. CPUs are known by names such as Core i5 and Phenom
Term
cylinder
Definition
single track on all the platters in a hard drive
Term
daily backup
Definition
backup of all files that have been changed on that day without changing the archive bits of those files
Term
default gateway
Definition
In a TCP/IP network, the nearest router to a particular host. This router's IP address is part of the necessary TCP/IP configuration for communicating with multiple networks using IP
Term
definition file
Definition
list of virus signatures that an anti-virus program can recognize
Term
defragmentation(DEFRAG)
Definition
procedure in which all the files on a hard disk are rewritten in disk so that all parts of each file reside in contiguous clusters. The result is and improvement in disk speed during retrieval operations
Term
DEL(Erase)command
Definition
command in the command line interface used to delete/erase files
Term
desktop
Definition
user's primary interface to the Windows operating system
Term
device driver
Definition
program used by the OS to control communications between the computer and peripherals
Term
Device Manager
Definition
utility that enables techs to examine and configure all the hardware and drivers in a Windows PC
Term
DHCP (Dynamic Host Configuration Protocol)
Definition
protocol that enables a DHCP server to set TCP/IP settings automatically for a DHCP client
Term
differential backup
Definition
similar to an incremental backup, backs up the files that have been changed since the last backup. This type of backup does not change the state of the archive bit.
Term
digital certificate
Definition
form in which a public key is sent from a Web server to a Web browser so that the browser can decrypt the data sent by the server
Term
digitally signed driver
Definition
all drivers designed specifically for Windows are digitally signed, meaning they are tested to work stably with these OSs
Term
DIR command
Definition
command used in the command-line interface to display the entire contents of the current working directory
Term
directory
Definition
another name for a folder
Term
Disk Cleanup
Definition
utility built into Windows that can help users clean up their disks by removing temporary Internet files, deleting unused program files, and more
Term
disk cloning
Definition
taking a PC and making duplicates of the hard drive,including all data, software and configuration files and transferring it to another PC
Term
disk duplexing
Definition
type of disk mirroring using two separate controllers rather than one; faster than traditional mirroring
Term
Disk Management
Definition
snap-in available with the Microsoft Management Console that enables techs to configure the various disks installed in a system; available in the Computer Management Administrative Tool
Term
disk mirroring
Definition
process by which data is written simultaneously to two or more disk drives. Read and write speed is decreased but redundancy in case of catastrophe is increased
Term
disk quota
Definition
application allowing network administrators to limit hard drive space usage
Term
disk striping
Definition
process by which data is spread among multiple drives. Increases speed for both reads and writes of data. Considered RAID level 0 because it does not provide fault tolerance
Term
disk striping with parity
Definition
method for providing fault tolerance by writing data across multiple drives and then including an additional drive, called a parity drive, that stores info to rebuild the data contained on the other drives. Requires at least three physical disks: two for the data and a third for the parity drive. This provides data redundancy at RAID levels 3-5 with different options
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