IT revision, pages 15-18 (Revision guide)

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What is meant by wired connection methods?
A method of connecting devices that use physical cables to connect between devices, systems or components.
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What is Cat5 (wired system connection method)
Used for telephone communications and ethernet networks.
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What are the advantages of Cat5?
Versatile, Widely available, Cheaper than other methods
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What are the disadvantages of Cat5?
Only useful over short distances, At a higher risk to interference than other wired techniques.
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What is coaxial wired connection (wired system connection method)?
All types of data communication, commonly used in television cabling.
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What are the advantages of coaxial?
Less likely to interference so works well over long distances, can be a cheaper method of connection.
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What are the disadvantages of coaxial?
Thickness of cable makes it difficult to work with, limited bandwidth
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What is fibre optic used for (wired system connection method)?
Telephone and internet cables, cable television and computer networking.
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What are the advantages of fibre optic?
Improved security, can be used over long distances, high data transfer rate.
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What are the disadvantages of fibre optic?
Very expensive, Specialist skills needed to install
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What is VGA used for (wired device connections)?
Used for analogue connection of video display equipment, such as projectors, CRTs or LCDs.
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What are the advantages of VGA?
Universally used on high resolution display equipment, Low cost cabling.
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What are the disadvantages of VGA?
Large cabling, Signal affected over distance, No DRM (digital rights management)
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What is HDMI used for (wired device connections)?
Digital connection of both video and sound from devices to display equipment.
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What are the advantages of HDMI?
Capable of high resolution, Used in computing and entertainment.
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What are the disadvantages of HDMI?
Limited length, More expensive than VGA.
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What is USB used for (wired device connections)?
Connecting equipment and devices such as printers, scanners, input devices and cameras.
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What are the advantages of USB?
High speed, Sends and receives data, Connects to multiple devices.
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What are the disadvantages of USB?
Limited distance, Limited power supply.
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What is a wireless connection method?
Wireless connection methods connect without wires, often using radio waves or light waves.
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- The following are wireless system methods -
-
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What is WiFi used for?
To connect devices wirelessly to local and wide area networks such as the internet.
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What are the advantages of WiFi?
High data transfer, Good range, Relatively cheap.
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What are the disadvantages of WiFi?
Can be complex, Security concerns (as it is available to everyone - just need a password so therefore easier to hack)
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What is 3G and 4G used for?
Used to connect to data networks such as the internet whilst on the go.
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What are the advantages of mobile data connections?
Allows you to access the internet on the go, 4G provides very fast connection speeds.
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What are the disadvantages of mobile data connections?
Heavy use of 3G/4G can lead to a high cost, Uses public networks.
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What is satellite broadband used for?
Provides connectivity to remote areas, often rural.
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What are the advantages of satellite broadband?
Wide coverage, High speed.
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What are the disadvantages of satellite broadband?
Affected by poor weather, High initial cost.
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What is microwave/laser used for?
Allows point to point LAN connections between locations.
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What are the advantages of Microwave/laser connections?
High speed, No ongoing costs.
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What are the disadvantages of Microwave/laser connections?
Affected by poor weather, High initial cost.
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-All of the following are wireless connection methods for devices-
-
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What is bluetooth used for?
Pairing devices over short distances such as headphones, keyboards, speakers, mice.
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What are the advantages of Bluetooth?
Easy to set up, Low power consumption
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What are the disadvantages of Bluetooth?
Low data transfer speeds, Very short range
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What is WiFi direct used for?
Connecting devices to remote displays. Similar to bluetooth.
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What are the advantages of WiFi direct?
Transmits both audio and video, Usually built into devices.
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What are the disadvantages of WiFi direct?
Limited range, Can affect data connectivity.
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What is WiFi used for?
Allows 'adhoc' networks to wirelessly connect to devices. Can be used to permit wireless printing.
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What are the advantages of WiFi?
Simple set up, Uses existing WiFi infrastructure.
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What are the disadvantages of WiFi?
Using 'ad-hoc' networks can impact connectivity
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What are the features of different networks?
Different types of networks can be defined by their size (LAN, WAN, PAN), or by their purpose (VPN).
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What does LAN stand for?
Local Area Network
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What is a LAN?
A computer network that covers a single building or site.
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What does a WAN stand for?
Wide Area Network
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What does a WAN do?
A computer network that covers a large geographical area such as a country or the whole world.
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Is the internet a WAN or a LAN?
WAN
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What does PAN stand for?
Personal Area Network
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What does a PAN do?
Used to network devices wirelessly within a short range of an individual.
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What does VPN stand for?
Virtual Private Network?
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What does a VPN do?
Creates a secure network connection over a public network by using encryption.
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What are the main factors affecting the choice of a network? (10)
User experience, User needs, Specs, Connectivity, Cost, Efficiency, Compatibility, Implementation (timescale, testing, downtime), Productivity, Security.
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Why is connectivity important?
Choice of cabling, how easy is it to connect to devices? Is the businesses location a place where fibre optic is supplied?
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What is meant by compatibility?
Will the network connect with all the devices the user has?
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What are the remaining 8 factors when choosing a network (excluding compatibility and connectivity)
User experience, User need, Specs, Cost, Efficiency, Implementation, Security.
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What should users/businesses consider when choosing components? (6)
Manufacturer, Specs, Warranty/Ongoing support, Infrastructure, Familiarity, Compatibility with existing components,
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What should users/businesses consider when considering performance factors?
Available bandwidth and connection methods, Load, Infrastructure, Professional level equipment or SOHO equipment.
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Other cards in this set

Card 2

Front

What is Cat5 (wired system connection method)

Back

Used for telephone communications and ethernet networks.

Card 3

Front

What are the advantages of Cat5?

Back

Preview of the front of card 3

Card 4

Front

What are the disadvantages of Cat5?

Back

Preview of the front of card 4

Card 5

Front

What is coaxial wired connection (wired system connection method)?

Back

Preview of the front of card 5
View more cards

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