Topic 2: Communication services Flashcards
(40 cards)
What are some advantages and disadvantages of mobile phones?
Advantages:
What are voice telephones? What are some of the services available on mobile phones?
Telephones are one of the most popular communication devices and although the landline phone is still very popular the growth in the use of mobile phones has meant that these have many more services available.
Here are some of the services available through mobile phones:
What is SMS (texting?)
SMS (short messaging service) or as most people know it, texting, allows short low-cost messages to be sent between phones. It is also possible to send text messages to phones using a computer or mobile device such as a PDA or palmtop.
What is fax?
Fax is like a long-distance photocopier. You put a document in the fax machine at one end and then enter the telephone number of the fax machine to which it is to be sent. The page is scanned, passed along the telephone line and it is printed out the recipients fax machine. Documents as well as diagrams/drawings can be sent by fax. It is possible to use a computer with a scanner and printer as a fax machine.
What is instant messaging (IM?)
Instant messaging is a method of two people using real-time text to conduct a conversation. Dome instant message services can make use of WebCams and allow people conducting conversation to see each other.
What is email?
Email is a fast and cheap way of sending messages from one computer to one or more other computers. It has the advantage that you can attach file to email.
What are chat rooms?
Chat rooms are virtual meeting places where you can meet and hold conversations with others. They are not without their dangers. You do not always truly know who you are talking to.
What are forums?
Forums are often called message boards and they allow people to post and respond to messages posted on them. Usually the forum is about a particular subject of interest.
What are bulletin boards?
A bulletin board is a computer with a special software that users can log into. Once logged in, they can upload and download files, read bulletins and messages, etc.
What is VoIP?
Voice over Internet protocol/Internet telephone enables cheap phone calls to be made using the Internet. It is a technology that allows for signals to be transferred over the Internet but they can sometimes be unreliable and the quality of the sound is poor.
What is video conferencing?
Videoconferencing allows face-to-face meetings to be conducted without the participants being in the same room or even the same geographical area. You will probably have seen video conferencing systems used to interview people in distant locations on the TV news. Videoconferencing allows people to hold a virtual meeting. The people at the meeting can see and speak to each other. They are also able to share documents, presentations, etc.
What are some advantages and disadvantages of videoconferencing?
Advantages:
What is version control?
When working on multiple versions of the file, each version should have a different filename to the previous version. There is always the danger of saving an older version of the file using the same filename loosing work in the process. Saving using different version names helps avoid this. This is called version control.
How do you transfer data securely over the Internet?
In order to transfer data, it is often necessary to use the Internet. This exposes the data to the threat from hackers. Hackers may view the data, alter the data or use the data to commit fraud. In order to transfer data securely it is necessary to encrypt it. Encryption scrambles the data as it is been sent and only the true recipient can unscramble it.
How do you make sure that only authorised people have access?
It is important to make sure the only people who are authorised to access the ICT system have access to it. There are a number of ways this can be done:
How would you show respect towards others on the Internet?
What is the data protection act?
This states what you can and cannot do with your personal data.
What is a web browser?
Web browser software is a program that allows access to webpages stored on the Internet. A web browser allows the user to find information on websites and webpages quickly and it does this by making use of: URLs, keyword searches, links and menus.
What is email software?
Email is an electronic message sent from one communication device (computer, telephone, mobile phone, or PDA) to another. Most web browser software has email software provided as part of it. Email software allows a user to: read and write emails, reply to an email, forward emails. Also create an address book where you produce a list of the people you need to contact with their contact details including their email addresses and it also allows you to send one email to a group of people.
What is messaging software?
Messaging software is a software that allows for written and oral communication between two people using the Internet. In most cases both users will need to have the same messaging software in order to communicate with each other. Messaging software includes: SMS software that allows text messages to be sent and received, instant messaging that allows users to conduct a real-time conversation by typing your messages to each other and VoIP, where users are able to make cheap voice calls to each other over the Internet.
What is file transfer?
Filetransfer is used to transfer a file of data from one computer to another. File transfer software is available as part of the email software and it allows you to attach files to emails. For example, you could attach a file containing a photograph of yourself obtained from a digital camera, a piece of clipart, a picture that you have scanned in, a long document, etc. Basically, if you can store it as a file, then you can attach it to an email.
How would you use the Internet for communication?
How would you use the Internet for commerce?
Most organisations use websites, sometimes for promotional purposes and sometimes to allow people to order goods or services using the site. This is called e-commerce. Lots of these websites allow customers to browse online catalogues and add goods to their virtual shopping basket/trolley just like in a real store. When they have selected the goods, they go to the checkout where they have to decide on the payment method. They also have to enter some details such as their mailing address and other contact details. The payment is authorised and the ordering process is completed. All that is left is for the customer to wait for the delivery of the goods.
How would you use the Internet for leisure?
