D322 WGU Correct answers latest update
Application Software
Programs end users run to accomplish tasks.
Productivity Software
Application software used to aid in productivity. I.E. Presentation software, word processor,
spreadsheets.
System Software
Consists of programs that make up the OS and directly support system itself.
**Includes services or DAEMONS
Server Software
Works with hardware to provide network service.
Local Application
Software stored on an individual computer.
Intranet
A LAN that uses IP. Used to communicate within organization.
Cloud Computing
Allows organization to access resources/app anywhere, anytime. Beneficial because an org. may
access resources it may not normally have.
Operating Systems
Allows a user to easily access hardware/software, required to maintain computer environment.
Kernel
Core component of OS.
Loads when computer first boots
Sits on top of hardware, is interface b/w hardware and software.
Device Drivers
Interface b/w OS and hardware.
Shell
Interface for user, often personalized. The shell provides access to the kernel.
I.E. The GUI will translate mouse motions into calls to kernel/routines. Desktop elements include
shortcuts, windows theme, menus, background.
Services (Daemons)
OS programs that start when OS is loaded. They run in the background and wait for an event to
initiate.
, Utility Programs
Allow user to monitor system performance.
Web Server
Role is to respond to HTTP requests.
*Most HTTP requests are for HTML docs, but could include any web accessible resource.
It's all combined into the URL.
**APACHE is most popular web server-can execute scripts for dynamic pages, use security
mechanisms, log request for trend tracking.
Proxy Server
A software that acts as an intermediary between a client and a server to shield the client from
adverse actions of the server.
*Also provides degree of anonymity, since IP address recorded is for proxy server and not individual
client.
*Can also be used to block requests to certain servers (i.e Facebook)
*Can reject responses that contain certain content (i.e "porn")
**SQUID is most common, but APACHE can also be used as proxy server.
Database Server
Permits database access across a network.
Performs tasks such as data analysis, data manipulation, security, and archiving.
May/may not store database itself.
**MySQL is popular.
File Server
Computer with large hard disk storing files, but can also store software to be run over network.
Email Server
Provides email service.
Accepts email request from clients.
IMAP,POPS,HTTP,MAPI,MIME
String Data
Alphanumeric or text
Ex: James (Last name)
623 Hill Street
Number Integer
Numeric data, whole numbers.
Ex: 4
Floating Point
Decimal.
Ex: 4.2
Date/Time
Application Software
Programs end users run to accomplish tasks.
Productivity Software
Application software used to aid in productivity. I.E. Presentation software, word processor,
spreadsheets.
System Software
Consists of programs that make up the OS and directly support system itself.
**Includes services or DAEMONS
Server Software
Works with hardware to provide network service.
Local Application
Software stored on an individual computer.
Intranet
A LAN that uses IP. Used to communicate within organization.
Cloud Computing
Allows organization to access resources/app anywhere, anytime. Beneficial because an org. may
access resources it may not normally have.
Operating Systems
Allows a user to easily access hardware/software, required to maintain computer environment.
Kernel
Core component of OS.
Loads when computer first boots
Sits on top of hardware, is interface b/w hardware and software.
Device Drivers
Interface b/w OS and hardware.
Shell
Interface for user, often personalized. The shell provides access to the kernel.
I.E. The GUI will translate mouse motions into calls to kernel/routines. Desktop elements include
shortcuts, windows theme, menus, background.
Services (Daemons)
OS programs that start when OS is loaded. They run in the background and wait for an event to
initiate.
, Utility Programs
Allow user to monitor system performance.
Web Server
Role is to respond to HTTP requests.
*Most HTTP requests are for HTML docs, but could include any web accessible resource.
It's all combined into the URL.
**APACHE is most popular web server-can execute scripts for dynamic pages, use security
mechanisms, log request for trend tracking.
Proxy Server
A software that acts as an intermediary between a client and a server to shield the client from
adverse actions of the server.
*Also provides degree of anonymity, since IP address recorded is for proxy server and not individual
client.
*Can also be used to block requests to certain servers (i.e Facebook)
*Can reject responses that contain certain content (i.e "porn")
**SQUID is most common, but APACHE can also be used as proxy server.
Database Server
Permits database access across a network.
Performs tasks such as data analysis, data manipulation, security, and archiving.
May/may not store database itself.
**MySQL is popular.
File Server
Computer with large hard disk storing files, but can also store software to be run over network.
Email Server
Provides email service.
Accepts email request from clients.
IMAP,POPS,HTTP,MAPI,MIME
String Data
Alphanumeric or text
Ex: James (Last name)
623 Hill Street
Number Integer
Numeric data, whole numbers.
Ex: 4
Floating Point
Decimal.
Ex: 4.2
Date/Time
