Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
What is Computer Literacy?
|
to be computer literate you must:
-Understand a computer's capabilities and limitations -Know how to use a computer |
|
What are the challenges facing a digital society?
|
-privacy risks
-personal data collection -email monitored -copyright infringement -reliance on computers for security -digital divide |
|
The difference between Information Technology (IT) and Information Systems (IS)
|
-data are streams of raw facts representing events and occurrences
-Information technology is the hardware and software applied to solve a problem -An information system consists of components that support decision making and control, and help with analysis, visualization, and product creation -One of the components of an information system is information technology |
|
Information Systems
-What is a system -An information system includes: -A system development life cycle (SDLC) is: |
System
-A collection of pieces working together to achieve a common goal An information system includes -Data -People -Procedures -Hardware -Software System development life cycle (SDLC) -An organized process (or set of steps) used to develop systems in an orderly fashion |
|
Connecting to the Internet
-An internet backbone is... -T lines is the... -An optical carrier line (OC) is... |
Internet backbone - Collection of large national and international networks
T lines—initially used for backbone ISP connection Optical carrier line (OC)—today’s most common backbone ISP connection |
|
An IP Addresses is a...
|
Unique number that identifies devices connected to the Internet
Typical IP address 197.24.72.157 Static address -Address never changes Dynamic address -Temporary address |
|
Domain Names are...
Top-level domains (TLD) Second-level domains |
Names that take the place of an IP address
Sample domain name: - www.mywebsite.com Portion of the domain name that follows the dot -Sample top-level domain names .com, .org, .edu, and .net Unique name within a top-level domain -Sample second-level domain names Yahoo.com, Google.com, and Unesco.org |
|
Web site is a ...
First page is known as... Web page contains: |
Web site:
-Collection of related Web pages -First page known as home or index page Web page: -HTML document -Text and graphics -Unique address -Hyperlinks |
|
URL stands for:
1: 2: 3: 4: |
Uniform Resource Locator
1: Domain Name 2: Protocol 3: Top-Level Domain (TLD) 4: Path or Subdirectory |
|
HTML/XHTML
-Hypertext Markup Language (HTML) -Extensible Hypertext Markup Language (XHTML) |
Hypertext Markup Language (HTML)
-Tags that describe the formatting and layout of a Web page Extensible Hypertext Markup Language (XHTML) -Successor to HTML -Has much more stringent rules regarding tagging |
|
computer’s four major functions
|
Gathers data (users input data)
Processes data into information Outputs data or information Stores data and information |
|
Data vs. Information
|
Data: Representation of a fact, figure, or idea
Information: Organized, meaningful data |
|
Bit
|
Binary digit
0 or 1 -Each letter, number, and character = a string of eight 0s and 1s |
|
Byte
|
8 bits
|
|
Computer Software
|
Programs that enable hardware to perform different tasks
|
|
Software
|
A set of instructions that tells the computer what to do
|
|
Two main types of software
|
System software
Application software |
|
System Software
|
Coordinates instructions between software and hardware
Includes -Operating system -Utility programs |
|
Application Software
|
Programs used to complete tasks
Includes Productivity software Specialty software Entertainment software Educational and reference software Personal software |
|
What the OS Does
|
Provides a user interface (GUI)
Manages the CPU Manages memory and storage Manages hardware and peripheral devices Coordinates application software with the CPU |
|
How does the CPU work?
|
Control unit
Arithmetic logic unit (ALU) Machine cycle: -Fetch -Decode -Execute -Store Speed: -MHz -GHz |
|
Types of storage devices
|
Hard drive
Floppy drive Zip disk drive CD/DVD Flash memory |
|
Virtual Memory
|
Instructions and data are stored on the hard drive when RAM is full.
Swap file Paging Thrashing |
|
The operating system provides...
|
an organizational structure for the computer’s contents
|
|
Hierarchical structure of directories:
|
Hierarchical structure of directories:
-Drives -Folders (Directories) -Subfolders (Subdirectories) -Files |
|
|
|