Flashcards
Sem título
Flashcards do conjunto (11)
- 1What is the difference between fibre optic cables and copper cables for connecting to the internet?Copper uses electrical signals and needs a repeater every 100 m or so; it is limited in bandwidth and is prone to electrical interference 9 such as lightning. Whereas fibre - optic uses light; the signal does not weaken much over distance; it is not prone to electrical disturbance and is harder to hack and has a high bandwidth
- 2What are two uses of GIS?Archaeology, town planning, land surveying and agriculture.
- 3What are the advantages and disadvantages of using bluetooth to connect to devices?No need for wires, many devices can connect automatically, signal only travels a short distance, may be hacked by others nearby.
- 4Wy is fibre optic cable better than dial up for watching a video online?With fibre-optic the video would arrive smoothly owing to the high bandwidth available whereas with dial-up the data would arrive so slowly that there would be long pauses while enough data was buffered to show the next screen.
- 5What are the advantages in using wireless network other than a wired one?No wires to sink/conceal
Can work anywhere in the office even close by
Easier o keep offices clean
Fewer trailing wires to trip over - 6What are the security issues of data if you have a wireless network installed?Hacker may gain access to the network and steal data
- 7What are the differences would find between dial up or broadband to access the internet?Dialup Broadband
Use a modem
Needs a telephone line
Coverts signal that can be passed along a telephone line
Time is spent making the connection by dialling the number
Data transfer speeds are slow
Pages appear very slowly when browsing the internet
Takes longer to upload files compared to broadband Uses a cable connection or ASDL
Can use the telephone at the same time
Much high transfer data rate compared to dialup
Can watch listen to video in real time
Can download large music files in a shorter time
Can use webcam services - 8What is e-commerce?E-commerce is buying or selling goods or services over the internet.
- 9What is the process involved with booking online holidays?To carry out online booking you would:
browse websites to find one that provides what you want (e.g. ‘Cheap holidays in Spain 2011’)
search the website for your specific requirements (e.g. self catering, near beach)
choose the date, number of people, number of rooms and so on
proceed to a ‘checkout’
choose a method of payment
enter the details of credit or debit card
enter information about the address where the tickets are to be delivered (or often you print off your tickets and travel plans yourself or they are sent to you by email). - 10An online shopping account is being set up and a password has to be verified. Explain the process of verificationAn online shopping account is being set up and a password has to be verified. Explain the process of verification
- 11State two types of bank card that can be used both at a shop’s checkout and at a bank’s cash pointDebit and credit card
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- FlashCards sobre Sem título, criado por lewih033 em 12-10-2014.
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- lewih033
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