ICT-UNIT 1, Let's communicate! (NOTES) HIGHLIGHTED

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  • Created on: 06-06-13 20:02
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ICT-UNIT 1, Let's communicate! (NOTES)
What can your phone do? 23/04/13
Smart phone is a phone offering advanced features. It is an example of a multifunctional device ­it has the ability to
do many different things using the same device e.g. games, Bluetooth, mp3
Picture resolution (pixels)-Refers to quality and detail of image on screen.
Higher resolution=better quality.
Camera resolution (megapixels) - Amount of detail that camera picks up in one picture.
Higher resolution=more detail file is very big
Be safe/efficient:
Withheld number is used to not make your number visible to the other party
Password locks prevent unauthorised access
Registered phones allow the owner to block the phone off by calling the network provider. This makes it
unusable to the criminal.
Storage capacity (gigabytes)-Amount of storage space in internal memory.
Memory card (gigabytes) - Secondary storage device for back-up, copy, removing files.
Secure Digital (SD) Card: Flash memory card. Stores up to 2GB
Secure Digital High Capacity (SDHC) - Flash memory card. Stores up to 32GB
File format-Particular code that file is stored in. If not compatible=device cannot decode info
Compatibility-device should be able to share + communicate with another device.
Different phones allow you to play different file formats, which may/not be compatible with your computer.
Phones need to be able to send and receive signals so that they can share data with other devices. This requires:
Bluetooth-exchange of data through short distances from fixed, as well as mobile (moving) devices. Phone
needs to be able to understand Bluetooth protocols (rules)
Wi-Fi-Exchange of data though longer distances.
Emails
POP3-Dowbloads your inbox when you log into your email through the internet.
Nabilah Chowdhury, 11Ra

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IMAP4-View your entire inbox + subfolders automatically.…read more

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Navigation/menu system (easier to guide older people)
Panic button (reach relatives easily)
Size of screen = buttons (older people can feel)
Volume (older people may have hearing problems)
No. of available features (some people may not want so many features e.g.…read more

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Personal Digital Assistant- Compact as a phone. Contains address book, note-making features, telephone +
internet, allows data exchange with computers.
When buying a computer, one needs to consider:
Processor (CPU) [gigahertz]-carries out calculations=processes. Higher processing speed=faster computer
BUT=more power used
-Mobile processors- For laptops. Use less power + switch off automatically when not used less heat + saving
energy.
Random Access Memory (RAM)-Temporary memory used by the computer. Runs open programs in the
computer.…read more

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You can conserve energy by:
Not playing multimedia, games, music
Reduce screen brightness
Allow computer to turn of computer parts automatically e.g. monitor switches off after 10 seconds
Run files from Hard drive after copying b/c uses less energy that OD
Disconnect unused devices
Earphones NOT speakers
Switch off Wi-Fi + Bluetooth
Peripherals are divided into:
Input devices-Takes info and puts into computer. Ready to be processed.
Output devices-Allows you to view/hear the processed info. e.g.…read more

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Voice over internet protocol (VoIP)-Sound is exchanged. Used to make a telephone call via the internet. Cheaper or
FREE, even internationally, but monthly fee may be charged in some cases. This means less phone bills. Need
peripherals such as, microphones, headset, speakers, and webcam (streaming videos) to use VoIP.
Mobiles need a 3G Connection (allows high-speed wireless transfer).
CONS of VoIP
Latency: The time delay between the moment something is initiated to the moment it is detectable.
Slow internet connection=delay in sound received.…read more

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Protocols-The set of rules used by computers to communicate with each other across a network. There are two types
of email protocols:
IMAP4-Downloads your inbox + subfolders, so you can view them on any computer you have connected to.
POP3-You have to use internet to download the mail, and then you can access it. You can log in and log out.
You are only charged for your connection time.…read more

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You can upload podcasts so that people can view them by subscribing and downloading the materials which are ready
for use. Subscribing to blogs=notified when others update info.
Social bookmarking allows others to update with info that you want to know.
Be safe/efficient:
Don't sit researching too long stress from information overload user feels overwhelmed + unable to take
any of it in Health problems e.g. back + eye strain.…read more

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Computer Misuse Act (1990) - Protects people from:
Logging onto someone else's computer/account and accessing their information
Making changes to computer material e.g. sending viruses to people on purpose.
Copyright, Designs and Patent Act (1988) - Protects people's original work/ideas from being used without
permission.
Data and Protection Act (1988) - Regulates how personal information. Protects against misuse.
Cookies- Small file, stores info related to your internet activity, then reports back to the website server.…read more

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The digital divide
The digital divide is those who have access to effective digital technology, and those who don't.
Causes of lack of access:
1) Low income 2) Rural area 3) Disability 4) Dyslexia 5) Elderly 6) Ethnic minority
Implications of digital divide
Economic-Money, wealth, production etc.…read more

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