Basic Computer Principle Flashcards
The sequence of instructions developed by a software programmer
Computer Program
Are programs that manage the resources of the computer system and simplify applications programming
System Software
They include such as the operating system, database management system, networking software, translator, and software utilities
System Software
Is the software that controls the computer hardware and acts as a bridge between application and the hardware
Operating System (OS)
What are the three major OSs is use today
Windows by microsoft
Macintosh OS
UNIX/Linux
Is that series of instructions that organizes the course of data through the computer to the solution of a particular problem
Operating System
Computer programs that are written by a computer manufacturer , by a software manufacturer, or by the users themselves o guide the computer to perform specific task
Applications Programs
Allows programs allow users to print mailing lists, complete income tax forms, evaluate financial statements, or reconstruct images from xray transmission patterns
Application Programs
What are the two types of monitors
Cathode Ray Tube (CRT)
Liquid Crystal Display (LCD)
The cathode ray tube or CRT is
almost obsolete
The Liquid Crystal Display or LCD
most common
The number of pixels on a display
Resolution
Grouping of one red dot, one green dot, and one blue dot
Dot Triad
Measurement of how close the dots are located to one another within a pixel
Dot Pitch
May be expressed as aperture grille pitch, pixel pitch, or slot pitch, depending on the monitor maker
Dot Pitch
Measure of how fast the monitor rewrites the screen or the number of times that the image is redrawn on the display each sound
Refresh Rate
Ratio of the width of the monitor to the height of the monitor
Aspect Ratio
Measured diagonally from one corner of the display to the opposite corner
Viewable Area
Consist of a cathode and anode within a vacuum tube
Cathode Ray Tube
Boils off a cloud of electrons and then a potential difference is placed on the tube
Cathode Ray Tube
Produces images by shining or reflecting light through a layer of liquid crystal and a series of color filters
Liquid Crystal Display
Has two pieces of polarized glass with a nematic liquid crystal material sandwiched between the two
Liquid Crystal Display
Is the physical (geometric) layout of the connected devices on a network.
Topology
What are the four common topology configuration
bus, ring, star, mesh
Is a network in which all devices are physically attached on a single wire
Bus Topology
This type of topology does not need any switches or hubs
Bus Topology
A network in which the devices are connected in a circle
Ring Topology
Each device passes its received messages to the next node on the ring always in the same direction
Ring Toplogy
Network that has the devices connected to a central hub or switch
Star Topology
Can be thought of as a bus topology
Star Topology
Is the most commonly used network topology
Star Topology
The data are sent through the hub out to the destination device
Star Topology
Is used most often to connect networks to other netwroks
Mesh Topology
This type of network has redundancy built in with the multiple connections.
Mesh Topology
network that has multiple pathways interconnecting devices and networks
Mesh Topology
Is sometimes created so that larger networks an be segmented or broken up into smaller network
network bridge or network component
Is sometimes created so that larger networks an be segmented or broken up into smaller network
network bridge or network component
This reduces the network traffic, speeds up he overall network connection
Network component - Network Switch
Is similar to a hub but it sends data only
Network Switch
It will read the destination address from the data and select a direct path to ithe intended target
Network Component - Network Switch
When the hub receives data from a device, it generally sends those data to all devices connected to it
Network Hub
Are commonly used in small office and home application
Network Hub
Is the simplest device that can be used to connect several pieces
Network Hub
It has several wiring ports available on it to receive and transmit data
Network Hub
Provides the interface between the computer and network medium
Network Interface Card
Becoming more commonplace as technology
Wireless Connections
Uses glass threads to transmit data on the network
Fiber Optic Cable
Is surrounded by plastic protective covering
Fiber Optic Cable
Is much faster than its metal counterparts
Fiber Optic Cable
It is most often used in the infrastructure of the network
Fiber Optic Cable
Similar telephone wire , consist of four twisted pairs of copper wires
Twisted-Pair wire
It is the most commonly jsed connection medium in LANS
Twisted - Pairs wire
Similar to the wiring used for the cable television run into house
Coaxial cable
computer that can work independently
Thick client
Generally a high-end computer
Thick client
Generally a high end computer
Thick client
a device that is found on a network that requires services and resources from a server
Thin client
a computer that manages resources for other computers
Server
House application provide storage for files
Server
similar to a server based network computer that controls the operation of the network
Client-Based network
similar to a server based network
Client-Based network
There can be multiple servers on this type of network
Server-Based Network
Allows the users to move from computer to computer
Server-Based Network
The most popular small office or home network
Peer-to-peer Network
Each computer on the network is considered equal
Peer-to-Peer Network
Wide of these long distance communication links drive up
Wide Area Network (WAN)
A network that span a large area city, state, nation,
Wide Area Network (WAN)
Has the fastest communication technology
Local Area Network
The computer are interconnected and communicate by sharing images and reports
Local Area Network (LAN)
wireless access points
Local Area Network (LAN)
two or more objects sharing resources and information
Network
These device can be shared among a group of computers to save money and space for the users
Network
A diode is an electronic device that allows current flow in one direction
LCD-LED
Emits light when electrically stimulated
LED
The first LED semiconductor material was
Gallium Arsenide (GaAs)
