LESSON 2.1

Question 1

The sequence of instructions developed by a software programmer is called a

Answer 1

computer program.

Question 2

are programs that manage the resources of the computer system and simplify applications programming.

Answer 2

Systems software

Question 3

is the software that controls the computer hardware and acts as a bridge between applications and the hardware.

Answer 3

operating system (OS)

Question 4

Computer programs that are written by a computer manufacturer, by a software manufacturer, or by the users themselves to guide the computer to perform a specific task are called ______________.

Answer 4

applications programs

Question 5

The number of pixels on a display

Answer 5

RESOLUTION

Question 5

two major types of monitors

Answer 5

the cathode ray tube (CRT; almost obsolete)

the liquid crystal display (LCD; most common).

Question 6

Measurement of how close the dots are located to one another within a pixel

May be expressed as aperture grille pitch, pixel pitch, or slot pitch, depending on the monitor maker.

Answer 6

Dot Pitch

Question 6

Grouping of one red dot, one green dot, and one blue dot.

Answer 6

DOT TRIAD

Question 7

Ratio of the width of the monitor to the height of the monitor

Answer 7

ASPECT RATIO

Question 8

Measure of how fast the monitor rewrites the screen or the number of times that the image is redrawn on the display each second.

Answer 8

Refresh Rate

Question 9

Measured diagonally from one corner of the display to the opposite corner.

Answer 9

Viewable Area

Question 10

Consists of a cathode and anode within a vacuum tube.

The cathode boils off a cloud of electrons and then a potential difference is placed on the tube.

Answer 10

CATHODE RAY TUBE

Question 11

Advantages OF CATHODE RAY TUBE

Answer 11

Produce a very bright image

Had a very fast refresh rate, which would reduce the possibility of blur in dynamic imaging.

Question 12

Disadvantages OF CATHODE RAY TUBE

Answer 12

Energy consumption

Heat production,

The sheer size and weight of the monitors

Question 13

Produces images by shining or reflecting light through a layer of liquid crystal and a series of color filters

Answer 13

LIQUID CRYSTAL DISPLAY

Question 14

A diode is an electronic device that allows current flow in one direction only.
An LED emits light when electrically stimulated

Answer 14

LCD - LED

Question 15

two or more objects sharing resources and information,

Answer 15

NETWORK

Question 16

Small area networked with a series of cables or wireless access points that allow computers to share information and devices on the same network.

The least expensive to install, and they are much faster than WANs because of their smaller size

Answer 16

LOCAL AREA NETWORK (LAN)

Question 17

A network that spans a large area: city, state, nation, continent, or the world
Used to connect computers that are not physically attached through conventional network cables but are rather connected through other means, such as telephone lines, satellite links, or other types of communication cable

Answer 17

Wide Area Network (WAN)

Question 18

Each computer on the network is considered equal; no computer has ultimate control over another

Answer 18

Peer-to-Peer Network

Question 19

There is a centralized computer (the server) that controls the operations, files, and sometimes the programs of the computers (the clients) attached to the network

The server provides a location for centralized storage and retrieval on the network.

Answer 19

Server-Based Network

Question 19

Similar to a server-based network in that there is a centralized computer that controls the operations of the network

Rather than sending the entire original resource to the client for processing, the server processes the resource as requested by the client and returns only the results back to the client.

Answer 19

Client-Based Network

Question 19

A computer that manages resources for other computers, servers, and networked devices

Answer 19

SERVER

Question 20

Similar telephone wire, but whereas telephone wire has only four wires, twisted-pair wire usually consists of four twisted pairs of copper wires that are insulated and bundled together with an RJ-45 termination

Answer 20

Twisted-Pair wire

Question 20

A device that is found on a network that requests services and resources from a server. May be another computer, a printer, or any other networkable device that needs a server to complete its tasks. Almost any personal computer (PC) can be a client, as long as it can be attached to the network

Answer 20

THIN CLIENT

Question 20

Uses glass threads to transmit data on the network. It consists of a fiber optic core that is surrounded by a plastic protective covering.

Answer 20

Fiber Optic Cable

Question 21

No physical cabling needed, but each device must contain the appropriate wireless transmitter/receiver mobility and convenience, but these kinds of connections have a limited range

Answer 21

WIRELESS CONNECTION

Question 21

Similar to the wiring used for the cable television that is run into a house. Consists of a center conducting wire surrounded by insulation and then a grounded shield of braided wire

Answer 21

Coaxial cable

Question 21

provides the interface between the computer and the network medium It provides the physical connection between the network and computer works with networking software to establish and manage the data, to chop up the data into packets, and to handle addressing issues

Answer 21

Network Interface Card

Question 22

is the simplest device that can be used to connect several pieces of equipment together for network communication purposes

Answer 22

Network hub

Question 23

is the physical (geometric) layout of the connected devices on a network. There are four common topology configurations: bus, ring, star, and mesh

Answer 23

TOPOLOGY

Question 24

Is a network in which all devices are physically attached to and listen for communication on a single wire.

Answer 24

Bus Topology

Question 24

is similar to a hub, but it sends data only to those devices to which the data are directed

Answer 24

network switch

Question 24

It can recognize in which segment a particular destination address resides and send data to it

Answer 24

NETWORK BRIDGE

Question 25

A network in which the devices are connected in a circle. Each device passes its received messages to the next node on the ring (always in the same direction), and the data transmissions move around the circle until they reach the correct receiver

Answer 25

RING TOPOLOGY

Question 25

Network that has the devices connected to a central hub or switch. Can be thought of as a bus topology with the bus collapsed into a central box: the hub or switch the most commonly used network topology.

Answer 25

Star Topology

Question 26

Network that has multiple pathways interconnecting devices and networks. This type of network has redundancy built in with the multiple connections.

Answer 26

Mesh Topology

Question 27

is sometimes created so that larger networks can be segmented or broken up into smaller networks to reduce traffic within that network

Answer 27

NETWORK BRIDGE