Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ICT > Unit 2 Connectivity > Flashcards

Unit 2 Connectivity Flashcards

1
Q

What is bandwidth?

A

The number of bits that can be carried by a connection in one second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a buffer? Give an example

A

An area of memory used to temporarily store data.
An example is when you are streaming video

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a domain? Explain how it works

A

-The name used to identify a web server.
-When a domain is pinged, a data packet is sent to a server and it is immediately returned to the device.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Explain how a buffer works

A

-video will not start playing until there is enough memory in the buffer to play for a few seconds.
-more data is downloaded during this time
-when the buffer is empty, there is no more video to play and will pause

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is latency?

A

The amount of time it takes to send data between devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a lag? Give an example of how this can affect the user’s experience.

A
  • Move slowly or fail to keep up
    -An example of this would be in online gaming, if the latency is high then the game will lag and not seem as responsive.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does interference disrupt wired and wireless signals?

A

-Can be caused by wireless signals, routers and appliances.
-To stop this, cabled connections can be shielded from it by wrapping wires in thin metal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does furniture disrupt wireless signals?

A

Walls and furniture can reduce the strength of wireless signals, reducing the available bandwidth.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does distance disrupt wired and wireless signals?

A

The strength of signals is reduced as the distance increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a LAN?

A

Local Area Network

-connects digital devices in a small geographical area e.g. building

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a WAN?

A

Wide Area Network

-spread over a large geographical area.
-often used to connect many buildings
-often have slower transfer speeds than LAN’s due to their wider reach

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a PAN?

A

Personal Area Network

-group of connected devices that are all near an individual user. e.g. connecting a smartwatch to smartphone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is tethering?

A

The process of connecting a host device that uses a mobile broadband connection with other devices so they can use / share the host’s broadband connection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What do satellites do?

A

They transmit data to and receive data from digital devices, which use antennae to receive radio signals that satellites transmit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why is GPS useful?

A

They can calculate the exact location of a device.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is DVB?

A

Digital Video Broadcasting

-internationally accepted standard method of broadcasting digital television.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What allows people in remote areas to place voice calls?

A

Satellite communication in satellite telephones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How do the military use satellites?

A

they use them for communication systems e.g. Global Command and Control System.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Explain how televisions are broadcast?

A

-transmitters broadcast radio signals that are received by the user’s antenna.

-the antenna sends a signal through a wire to the television or receiver, converting it into images and audio.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is DVB-T?

A

Digital Video Broadcasting - Terrestrial is where transmitters are based on the Earth, instead of in orbit. They do not need a special antenna.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is ethernet?

A

A network connectivity standard that provides a way for computers to communicate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is HDMI’s use?

A

Digital video connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is a minijack’s use?

A

Personal headphones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a USB’s use?

A

Storage transfer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is Ethernet’s use?

A

Networking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Wireless communication
Examples of using Wi-Fi.

A

Wi-Fi is used in home and office networks, it is a wireless technology used to connect devices to a network, which can then be connected to the internet.

26
Q

What is Bluetooth?
Examples of using Bluetooth.

A

Bluetooth lets devices connect over short distances.
However they cannot carry as much data as Wi-Fi and need to pair with the device before they can communicate.

Examples are connecting smartphones and laptops to earphones, speakers etc

27
Q

Wi-Fi vs Bluetooth

A

WiFi
-long range
-high bandwidth
-high power usage
-high security

Bluetooth
-short range
-low bandwidth
-low power usage
-low security

28
Q

What is 3G and 4G

A

They are mobile broadband’s which provide internet access to mobile devices when a Wi-Fi signal is not available. (G stands for generation)

29
Q

What is Infra-red signals?

A

Electromagnetic radiation with longer frequency than visible light
They cannot carry much data and have short ranges. they are usually affected by sunlight e.g. remote controls

30
Q

What is NFC?

A

Near-Field Communication. it uses RFID (radio frequency identification) chips used in smartphones and payment cards.

31
Q

Wired vs Wireless

A

Wired
-cables are fairly cheap
-risk of tripping over cables
-faster speed than wireless
-more stable (less interference)
-not portable
-can look untidy and messy
-most secure

Wireless
-no need to buy cables
-no safety hazards
-slower speed than wired
-affected by interference
-portable within range
-tidy
-less secure- easy to intercept

32
Q

What is an ISP?

A

Internet Service Provider. A company that provides customers access to the internet.

33
Q

What is a fire optic cable?

A

A cable that sends data using light signals.

34
Q

What is a copper cable?

A

A cable that sends data using electrical signals which are conducted through copper wires.

35
Q

NETWORKS

A

NETWORKS

36
Q

What does a network allow?

A

A network operating system allows a computer to communicate on a network. -provides functionality to a stand-along operating system.

37
Q

What is a stand-alone?

A

Something that can function on its own. e.g. a stand-along computer, without being part of a network.

38
Q

What does a stand-alone operating system include?

A

-passing usernames and passwords to a server for checking when a user logs on.
-separating users accounts and checking accessibility
-providing access to network storage and shared resources.

39
Q

Give 3 three methods used to identify devices on a network.

A

-Internet protocol (IP)
-MAC address
-Device name

40
Q

What is an IP address?

A

It is a unique address that networked devices use to send data to each other.

41
Q

Why are MAC addresses different to IP addresses?

A

They are universally unique identifiers given to the network interface card. They are assigned by manufacturers and are 6 characters long.

42
Q

What is a hotspot?

A

A place in a building where there is a computer system with an access point, allowing people in a building to connect to the internet or a service.

43
Q

Why is a device name important?

A

It helps people identify different devices, such as computers on a network.

44
Q

Describe the correlation between a bit and terabytes (everything in between)

A

8 bits= 1 byte
1,024 bytes= 1 kilobyte
1,024 kilobytes= 1 megabyte
1,024 megabytes= 1 gigabyte
1,024 gigabytes= 1 terabyte

45
Q

Give 2 characteristics of fibre optic cables

A
  • they are flexible wires
    -they are expensive
46
Q

What is a wireless access point?

A

a point that allows devices with Wi-Fi connectivity to connect to a wired network

47
Q

What is a gateway?

A

a gateway connects two different types of networks.

48
Q

What is a router?

A

a router stores the addresses of all devices that are connected to it so that it can forward network traffic with the quickest route.

49
Q

What is a booster used for?

A

It is used to amplify the signal in a network so that its range can be extended.

50
Q

What is a server?

A

A computer that shares its resources with connected devices (clients)

51
Q

INFORMATION SLIDE

A
  • An authentication server checks usernames and passwords
  • A print server manages multiple printers at a time, dealing with print requests from client computers and forming queues.
  • File servers allow users to access shared and private storage
  • Application servers provide clients with app access, directly run from the server.
52
Q

Give 4 types of servers.

A

-Authentication server
-Print server
-File server
-Application server

53
Q

HTTP

A

Hypertext transfer protocol- set of standards used to control how documents are written

54
Q

What is a web browser?

A

Type of software application used to request and display information stored on web servers.

55
Q

What is a search engine?

A

They provide users with a way to find information in web pages stored on web servers.

56
Q

What is a blacklist vs a whitelist?

A

A list of unacceptable URLs and a list of acceptable URLs.

57
Q

Peer-to-peer networks

A

these computers share their resources with other computers in the network, but with no access to the server.

58
Q

client-server networks and benefits

A

a network that uses servers

-control of user access rights
-centralized administration
-centralized backup
shared software and storage, files
-roaming profiles

59
Q

Securing data on networks
How do logins and passwords secure data?

A

-users log in to computers using correct login details
-passwords are used to authenticate and user to the network.

60
Q

How do firewalls secure data?

A

they are used at the gateway of a network, it controls the network traffic and prevent unauthorized users from accessing devices and resources.

61
Q

How do encryption secure data?

A

it encodes and scrambles data so unauthorized users are prevented from being able to understand it.

62
Q

WEP

A

Wireless Encryption Protocol is used to secure the wireless transfer of data.

63
Q

WPA

A

Wi-Fi Protected Area is a security protocol designed to provide less encryption than WEP.

ICT (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions