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Technologies available to access Information |
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This report will describe technologies which are available to access information, exchange information and carry out transactions and will show a link between the technologies and different areas of society.This report is aimed at pupils within a year ten or eleven class as a reference document during unit 3 of the Applied Information and Communication Technology (Double Award). Technologies available to access Information The internet is the fastest growing and largest world wide source of information, for a brief history of how it came about see appendix A. ... All of the nets technologies; web, newsgroups, email, mailing lists, this enables geographically distributed groups of people to communicate who otherwise couldnt do so. ... Digital information travels at 2/3 of the speed of light on copper wire and on fibre optic cables, or about 200 thousand kilometres a second, less than full light speed because copper and fibre optic cable are about one-third thicker than a vacuum. ... Internet routers are getting faster and faster with switching speeds nearing instantaneous, while fibre optics and wireless technologies are enabling networks to send much larger numbers of bits at once. ... This can be seen as an advantage or a disadvantage, on one side companies can now communicate not just verbally but also with physical information which can be made available to all inside and outside the company. However anyone can access the information even though it maybe protected or hidden from the majority of people, someone will always find a way in. ... A new type of criminal has emerged, called hackers, they use the internet to obtain all types of information, such as money or companies private detail. ... • Universal access. ... Web browsers have been deployed on cell phones and personal organizers, and the web is now the standard interface for providing access to information. ... People now use the world wide web as a source of entertainment, they search for information, play online games, watch the latest movie trailers and hear samples of the latest music. ... One major downside is that anyone can access the sites and can pose as anyone, this has lead to Microsoft closing down all its chat sites. ... To connect to the above two technologies a modem is required. ... Another way to connect to the World Wide Web is through mobile phones via WAP, Wireless Application Protocol is an accepted, open industry standard that allows wireless devices to access information and services on the Internet. ... WAP certainly does not replace the use of PCs to access the Internet. It simply complements them with an “anywhere, anytime” access solution. ... Technologies Available to Exchange Information Email is the most widely used Internet application. ... The key features of email are: Email is a “push” technology, these technologies deliver information to the user so all they have to do is receive it. Radio and television are other types of push technologies. ... For example, the recipient doesnt have to be available when they compose and send an email, they can send an email at the time that is most convenient to them. Similarly, they dont have to be available when someone else sends them an email, their email waits on their server until they log in and download it when most convenient to themselves. ... Its possible that a person can receive information that has been mailed to more than one person, for example an announcement sent to hundreds of people on a mailing list. ... Use of regular mail, telephone, or telegram to communicate the same information as email would take much longer, and be much more expensive. ... When compared with the cost of airtime for voice calls or wireless web access, SMS is a real bargain. ... There is no need to call an access number, as is the case with voice-mail. Also, most networks offer SMS alerts (information packets, such as stock quotes, sports scores, and news) that can be delivered to mobile phones at regularly scheduled intervals. ... Digital radio eliminates the hisses and crackles of interference, as it sends the information via a series of ones and noughts, not through a wave. Listener choice has broadened with the development of digital radio with the new space available on the airways. Stations are available to cater specifically to listeners interests be they money or sports news, classical music, 24-hour rock, easy-listening, or talking-books. At a national level there are an additional five BBC stations available in 2003 and nine commercial stations. There are a number of regional stations available, catering at a local level to tastes and interests. ... Information on personal level can now be exchanged through many different ways, and more information can now be stored on the products that carry them. ... A DVD, Digitally Versatile Disc, works exactly the same way as a CD-Rom, but it can hold a lot more information, about 4. ... A recordable Minidisk is a magneto-optical device capable of storing 140 megabytes of information. ... A recent development in personal communications and the exchange/storing of information is the PDA, Personal Digital Assistant. ... The idea of making a small hand-held computer for storing addresses and phone numbers, taking notes and keeping track of daily appointments originated in the 1990s, although small computer organizers were available in the 1980s. ... Though originally intended to be simple digital calendars, PDAs have evolved into machines for crunching numbers, playing games or music and downloading information from the Internet. ... Technologies Available to Carry out Transactions Most new technologies developed to carry out transactions are used to make peoples lives quicker and easier, the two most popular are ATM (Automatic Teller Machines) and EPOS systems (Electronic Point Of Sale). ... The host processor is similar to an Internet service provider in that it is the gateway through which all the various ATM networks become available to the cardholder (the person wanting the cash). ... Dial-up ATMs connect to the host processor through a normal phone line using a modem and a free telephone number, or through an Internet service provider using a local access number dialled by modem. |
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