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VCE Computing > Year 10 Exam: Area Of Study 2 > Flashcards

Year 10 Exam: Area Of Study 2 Flashcards

1
Q

What is a Local Area Network (LAN) and what are its capabilities?

A

A local area network connects computers and devices in a limited geographical area, such as a home, school, office building or closely positioned group of buildings. Each computer or device on the network is a node.

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2
Q

What is a Wide Area Network (WAN) and what are its capabilities?

A

A WAN covers a large geographical area (as opposed to local) using a communications channel that combines many types of media such as such as telephone lines, cables and radio waves.

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3
Q

What is a client server network?

A

A network in which one or more computers act as a server (host computer) and the other computers on the networks (clients) can request services from the server.

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4
Q

What is the role of a server on a client server network?

A

A server controls access to the hardware and software on the network, and provides a centralised storage area for programs, data and information.

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5
Q

What is a peer-to-peer (P2P) network?

A

A (P2P) is a simple, inexpensive network that typically connects fewer than 10 computers. Each computer can share the hardware (such as the printer), data or information located on any other computer in the network.

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6
Q

What are the main functions of communications devices?

A

Communications devices enable computer users to communicate and exchange items such as data, instructions, and information with another computer.

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7
Q

What is a switch?

A

A switch is a device that provides a connecting point for cables in a LAN. A switch stores the address of every device down each cable connected to it. When a packet enters the switch, it uses simple logic to detect the destination of the packet and sends the packet down the cable that contains the addressed device.

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8
Q

What is a router?

A

A router is a device used to connect multiple networks - several LANs or LAN and a WAN, such as the internet. A router will connect LANs and WANs irrespective of the hardware and network communications protocol used in each segment.

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9
Q

What is a broadband router?

A

Broadband routers are routers for home networks and are designed specifically to join the home (LAN) to the internet (WAN) to share internet connections.

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10
Q

What is a wireless access point (WAP)?

A

A wireless access point is a communications device used on local area networks. It acts as a central transmitter and receiver of wireless radio signals.

A WAP is often connected to a wired network backbone for faster transmission of data back to the network server.

WAPs are mostly used in business networks where larger buildings and spaces need wireless coverage.

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11
Q

What is a wireless extender (wireless repeater) ?

A

Wireless extenders increase the area covered by a wireless network. They allow users to keep keep mobile devices, media players and computers connected to a wi-fi network with expanded coverage throughout the home or office.

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12
Q

Define communications software

A

Communications software is an application or program, designed to pass or support the movement of information over a network.

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13
Q

What is a network operating system (NOS) ?

A

A NOS is the system software that controls a LAN. A NOS controls the attached computer systems, any peripherals and the communication between them.

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14
Q

What are some of the tasks performed by a NOS?

A

Administration

File management

Device management

Security

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15
Q

What are the purposes of network protocols?

A

Network protocols outline the rules and conventions for communication between network devices.

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16
Q

What are the strengths and limitations of wireless communications technology?

A
  1. Communications satellite: 1 Gbps
  2. 802.11ac: 867-1300 Mbps
  3. Microwave radio: 150 Mbps
  4. 802.11: 108-600 Mbps
  5. 802.11a: 54 Mbps
  6. 802.11g: 54 Mbps
  7. 4G: 2-12 Mbps
  8. 802.11b: 11 Mbps
  9. HomeRF: 1.6-10 Mbps
  10. Infra-red: 115 Kbps - 4 Mbps
  11. Bluetooth: 1-2 Mbps
  12. 3G: 200 Kbps - 2 Mbps
  13. 2G: 9.6 - 19.2 Kbps
17
Q

What are the capabilities and limitations of smartphones?

A

Capabilities of smartphones Limitations of smartphones
Allows users to:
-make and receive phone calls - small display
-surf the internet -small keyboard
-send and receive emails -difficult to print from
-operate a calendar of events - applications are limited
-play music
-take pictures
-store images
-use GPS
-run apps

18
Q

List the advantages and disadvantages fibre-optic cables have over twisted-pair cables.

A

Advantages: Disadvantages

  • carries more signals than wire cables -expensive
  • faster data transmission -difficult to
  • less susceptibility to interference install
  • better security for signals during transmission
  • their smaller size
19
Q

List some security threats to data and information communicated and stored within networks?

A

Accidental threats:
deleting files accidentally

Deliberate threats: 
hackers
malware
spyware
viruses
worms
trojans
logic bombs
keyloggers
phishing

Event based threats:
power surge

20
Q

What is a virus?

A

A computer program that can destroy files and alter the performance of the operating system.

21
Q

What is a worm?

A

A virus that copies itself repeatedly in memory or over a network.

22
Q

What are Trojans?

A

Programs that pretend to be one thing, but that are actually performing another malicious background function.

23
Q

What is a firewall?

A

Hardware and software that restrict access to data and information on a network.

24
Q

What are some legal responsibilities of network professionals and users of networks?

A

Ensuring that copyright laws are not infringed.

Ensuring that privacy laws have been complied with.

25
Q

Discuss some ethical responsibilities of network professionals and users of networks.

A

Following the correct moral path.

26
Q

Discuss some risks associated with using a network.

A

Breaches of security: Inadequate security systems are liable to be attacked by malware or hackers.

User dependence: Faulty components could limit the effectiveness of a worker or the productivity of a business.

Social networks: distracting, negative impact on health.

27
Q

Discuss ways in which people, processes, digital systems and data combine to form networked information systems

A

Digital system: where the data comes from; the components

People: the ones that receive the data and what they do with it

Processes: how the data gets to the people

Data: what the people are actually analysing

28
Q

How are wireless communications in a LAN achieved?

A

Through the use of radio signals

29
Q

What is an intranet?

A

A private communication system for users of a LAN

30
Q

A router can protect a LAN from?

A

some outside threats

31
Q

What does the Domain name system (DNS) do?

A

Converts a domain name into the IP address of a server that hosts a web site

32
Q

The protocol for web traffic is?

A

HTTP

33
Q

Ethernet defines?

A

How data packets will travel between networked devices

34
Q

An information system is different from a computer system because?

A

The information system also includes data, processes and people

35
Q

Phishing is when

A

Victims are fooled into giving their banking details to criminals

36
Q

Mobile internet devices tend to suffer from?

A

Slower and more expensive communications

VCE Computing (4 decks)

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