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Computer Networks And Technology > Short Definitions > Flashcards

Short Definitions Flashcards

1
Q

Tablet

A

A device with operating system and touch screen display processing circuitry and rechargeable battery in a single thin flat package.

Can do what other computer do but lacks input/output abilities.

Larger than smartphone but may not always support access to cellular network

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2
Q

802.11

A

Evolving family of specification for wireless LANs developed by a working group of IEEE.

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3
Q

Control over system performance

A

Monitors overall system health to help improve performance.

Records delays between requests for a service and response from the system.

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4
Q

Clock rate/speed

A

Number of pulses per second generated by an oscillator that sets tempo for the processor.

Measured in MHZ,GHZ.

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5
Q

Trackball

A

Controls position of the cursor on the screen,movements are controlled by moving a ball.

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6
Q

Display resolution

A

Measures width x height in pixels of a television or a display device.

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7
Q

Executable files

A

To perform various functions or operations on a computer.
Cannot be read because it is compiled.

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8
Q

SMTP

A

Simple Mail Transfer Protocol
Set of communication guidelines that allow software to transmit email over the Internet.

  • only works with outgoing messages.
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9
Q

Scanner

A

Electronic devices using light sensing equipment to scan paper images such as text, photos, illustrations and translate the images into signals that computer can store, modify, distribute.

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10
Q

Touch screen

A

Input device
Layered on top of electronic visual display.
Use to input information by multitouch gestures by touching the screen with fingers or stylus.

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11
Q

Multimedia

A

Integration of text,graphics, drawings, still and moving images,animation,audio, and other media where every type of information can be represented, stored,transmitted, and processed digitally.

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12
Q

Hypertext

A

A text with references (hyperlinks) that allows users to access related informations by clicking on the links or keywords within a document or web pages.

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13
Q

GPS

A

A navigation system using a receiver and algorithms to synchronise location, velocity and time data for air,sea and land travel.

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14
Q

Web browser

A

Locate and display webpages.
Can display graphics and text, multimedia, though they require plugins for some formats.

Ex: Internet Explorer, google Chrome, Microsoft Edge.

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15
Q

Data Encryption

A

Translation of data into secret code before transmission.

Receiving devices must be able to decrypt data transmitted.

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16
Q

System file

A

Critical files without which a computer system may not operate correctly.

May be part of operating system.

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17
Q

Archive file

A

Collect multiple data files together in a single file for easier portability and storage or simply to compress files to use less storage space.

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18
Q

Bar code reader

A

Electronic device that read and send printed barcodes to computer.

Consists of light source, a lens and light sensor translating optical impulses into electrical ones.

19
Q

HDMI

A

High Definition Multimedia Interface

Hold resolution quality of monitor ,projector, TV constant.

Reproduces screen quality better than VGA.

Send audio to external screen making it convenient and good quality choice.

20
Q

Ethernet

A

Port/Jack on computer allows use of ethernet connector.

Allow creation of LANs

Used on routers, computers, modems.

Allow multiple local devices to share information and work together.

21
Q

Desktop Computer

A

Personal computer for regular use at a single location due to its big size and power requirements.

Most common configuration is monitor,keyboard and mouse and a case that houses main components of PC, namely power supply, motherboard, hard drive and optical drive.

22
Q

Laptop

A

Portable computers that you can take with and use in different environments.
Include a screen, keyboard and trackpad.

Have battery which allows them to operate without being plugged into a power outlet. Include power adaptor to charge battery.

23
Q

Wireless connection

A

No physical connection between sender and receiver.
Network is connected by radio waves or microwaves to maintain communications.

24
Q

VPN

A

Virtual Private Network

allows you to create a secure private network connection over a public network as if your computing device is directly connected to private network.

Encrypts your internet traffic, makes it difficult for anyone to intercept or access data.

25
Q

VoIP

A

Voice over Internet Protocol

allows to make voice calls over the internet instead of traditional phone lines.
converts voice into digital signals and transmits them over the internet to the recipient, who then hears the voice as if on phone call.

more cost-effective, features like video calling and instant messaging.

26
Q

Internet Protocol

A

IP uses set of rules to send and receive messages at internet address level.

27
Q

Input Devices

A

Keyboard
Mice
Scanner

28
Q

Output Devices

A

USB drives
Hard disk drive
Solid state drive

29
Q

Hard drive capacity

A

Amount of data,HDD can store.
Higher capacity can store more data like files, documents,photos, and videos.
Measured in GB and TB.

30
Q

Benchmarking

A

Compare and evaluate performance of system against same/similar system.

31
Q

Motherboard

A

It holds everything in place, lets components communicate with each other.

Foundation of computer

32
Q

USB PORT

A

allows stand alone electronic devices to be connected via cables to a computer or to each other.

33
Q

Updating/upgrading software files

A

Computers have latest tools and utilities to execute instructions.

Newer and faster processors require up to date software to achieve maximum efficiency.

34
Q

Defragmentation

A

Process of grouping files together that are stored in fragments across storage devices.

Files can be read faster by processor and can increase the speed of computer.

35
Q

Cache memory

A

Store frequently accessed data and instructions for quick access by CPU.

36
Q

Arithmetic Logic Unit (ALU)

A

Has special memory location called registers.

Perform addition, subtraction,multiplication and division, logic comparison.

37
Q

Storage Devices

A

USB drives
Hard disk drive
Solid state drive

38
Q

VLAN

A

Virtual Local Area Network

groups of workstations, servers and network devices that appear to be on same LAN despite geographical distribution.

removes latency in network, which saves network resources and increase network efficiency.

assist in issues like security, scalability, network management.

traffic easily controlled by VLANs

39
Q

Server

A

A program or device that provides functionality for other programs or devices called clients

40
Q

Internet of Things (IoT)

A

Encompasses everything connected to Internet.

Is made up of devices from simple sensors to smartphones and wearables- connected together

41
Q

Virtualization

A

Refers to creation of a virtual resource such as server,desktop,operating system, file,storage, or network.

42
Q

Video Graphic Array

A

15 pin connector used to produce an image on screen.

Found on computer monitor, TV sets

43
Q

Services offered by ISP

A

Access Internet

Backup of data

Access to cloud

Telephone line and access to telephone network

Security system

User account, log in

44
Q

DHCP

A

Dynamic Host Configuration Protocol

Automatically assign unique IP addresses to devices on a network, saving time and risk of conflicts.

Operates on client server model.
Leases IP addresses to clients for specific period of time, after which Client must renew the lease or obtain a new IP address.

Computer Networks And Technology (31 decks)

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