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Acquisition or rental of equipment to produce multimedia can be costly.
2.3 Encryption
Encryption is about keeping data secret
Codes can range from anything but as long as the sender and the recipient know the code, the message can be decoded
Encryption can be damaging as e.g. the police may want to monitor a suspected drug dealer and may need to find off a drop off point but are unable to decode the message.
Advantages- E-mails – sometimes we want our mail to be private!
People have a right to a degree of privacy in their lives.
Do you want the postman reading your letters??
Online Purchasing (Ebay, Amazon, Victoria’s Secret)
Some personal information you want kept private (i.e. credit card numbers)
Disadvantages- Private communication between terrorists
More difficult for National Security Agency
Harder to crack down on terrorists
Hate groups could use encryption for their own ends
Encryption will make cracking down on hate groups more difficult
- Modems
Short for modulator-demodulator. A modem is a or that enables a to transmit over, for example, telephone or cable lines. Computer information is , whereas information transmitted over telephone lines is transmitted in the form of waves. A modem between these two forms.
Advantages- 56K modems perform better than their 28.8K and 33.6K cousins.
The half-digital nature of 56K means that your connect rates will be higher than with pure analogue technology.
Most people can expect speeds in vicinity of 40-50K. It's not a huge leap, but its natural progression over today's speeds, and it will be an easy decision for people buying their first modem, and for anyone who's still using a 14.4 modem.
Disadvantages- if you were one of the first people to buy a 28800 modem, you may have discovered that most of the places that you called still used 14400 modems, so you could only connect at 14400. It's always been this way with modems: they can only connect at the highest speed supported by both modems.
- ADSL
ADSL stand for Asymmetric Digital Subscriber Line.
ADSL is a broadband connection technology, which utilises existing copper wired telephone networks. ADSL uses a wide range of frequencies over an existing telephone line to deliver much higher speeds than your standard 56k modem (between 10 and 40 times faster). It is also possible to use your phone while online.
Advantages- Broadband Internet connections like ADSL offer much faster data transfer rates compared to regular modem connections. This means that websites and e-mail will download more quickly.
ADSL is always on. As long as your PC is powered on it's connected to the Internet. This makes getting on-line much easier as you don't have to wait for your computer to dial your ISP and connect to a server. Just open a browser window and your chosen start page will load immediately
ADSL does not tie up your phone line. You can make and receive voice or fax calls normally whether your computer is being used on-line or not.
ADSL is not charged by the minute like dial-up modem connections. A fixed charge is added to your phone bill every month. The charge depends on the ADSL package you buy.
Disadvantages- ADSL offers similar bandwidth to leased lines at a fraction of the cost, however the bandwidth is not guaranteed. ADSL lines are shared with up to 50 other users. This is known as the contention ratio. Most contention ratios are 50:1 for home and SOHO users, and 20:1 for business users. The amount of users using one line at any one time can make your bandwidth fluctuate. Therefore if you require a fixed, permanent bandwidth, REDNET would advise using a leased line as opposed to ADSL.
2.6 Mobile Phones
2.6.1 SMS
SMS stand for Short Messaging Service
SMS is the transmission of short text messages to and from a mobile phone, fax machine and/or IP address. Messages must be no longer than 160 alphanumeric characters and contain no images or graphics.
Advantages- SMS messaging is not tied down to terminals but are an inherently mobile technology. The widespread adoption of this technology means that even remote or mobile areas of an organization can be given access to physically fixed data.
- The travelling salesman can be given access to the company's inventory data...
- The courier can update a database with delivery schedules the second he actually delivers the package and the customer can be notified the second after...
- Students can check their grades and enrol for courses even during vacations...
- Fleet operators can check the location of vehicles online through GPS (Global Positioning System) enabled mobile devices etc.
SMS is Always On
SMS is available 24 hours a day, seven days a week and people carry around their mobile phones. Hence, customers, business partners and employees readily receive messages sent.
SMS is Low Cost
- WAP
WAP stand for Wireless Application Protocol
WAP is a secure specification that allows users to access information instantly via such as mobile phones, pagers, two-way radios, smart phones and communicators.
Advantages- Wap is the Internet on your phone and is used wherever u can go and it can be used by: -
- The travelling salesman can be given access to the company's inventory data...
- The courier can update a database with delivery schedules the second he actually delivers the package and the customer can be notified the second after...
- Students can check their grades and enrol for courses even during vacations...
-
Fleet operators can check the location of vehicles online through GPS (Global Positioning System) enabled mobile devices etc.
Disadvantages- these are that it’s slow and not efficient, it isn’t completely set up and not many people have it at the moment
Sending a message via SMS is low cost to the enterprise and low cost for the customers inquiring information from your company. While WAP (Wireless Access Protocol) and Mobile Internet can offer more information per connection, it requires you to establish pretty long winding access procedures and may easily cost 10 to 100 times more than the quick and specific request of a SMS message.
SMS is Fast
As a communication technology, SMS is fast to adapt, learn, and deploy. The technology is not dependent on large network installations or fixed landlines that can take weeks or months to deploy. With a deployment using the IC Jacobsen ISMS Server it has now become incredibly easy to integrate SMS to all existing services like Email, Chat, Databases and applications.
- Digital Broadcasting
Digital Broadcasting is a system, which broadcasts digital information to television in people’s homes. They’re a lot of company's that use digital broadcasting. Digital Broadcasting is also use in digital music players and radios.
Advantages- it is possible to provide high-quality video/audio broadcasting services using a digital broadcasting system that is resistant to noise and ghosting.
News and daily life information can be made available at any time by storing all necessary information on (characters, still pictures, etc.) in the receiver.
Connection to a communications network allows TV viewers to participate in programs at home.
Disadvantages- the interactive is slow and sometimes digital TV can crash
- Personal digital assistant (PDA)
Short for personal digital assistant, a handheld that combines computing, telephone/, Internet and . A typical PDA can function as a cellular phone; fax sender, Web and personal organizer. Unlike , most PDAs began as pen-based, using a rather than a for . This means that they also incorporated features. Some PDAs can also react to voice input by using technologies. PDAs of today are available in either a stylus or keyboard version.
Advantages- increasingly technologically connected
Expanded knowledge for faculty and students
Information available at point-of-care
Disadvantages- a P.D.A cost quite a bit like in the range of £350-£500, Hardware requires respect, Confidentiality issues, Ethical and, legal demands, Potential violation, Problems may be overcome with system security
- DVD
Short for digital versatile disc or digital videodisc, a type of optical disk technology similar to the . A DVD holds a minimum of 4.7 of data, enough for a full-length movie. DVDs are commonly used as a medium for digital representation of movies and other multimedia presentations that combine sound with graphics.
The DVD specification supports disks with capacities of from 4.7GB to 17GB and access rates of 600KBps to 1.3 . One of the best features of DVD drives is that they are backward-compatible with CD-ROMs, meaning they can play old CD-ROMs, CD-I disks, and video CDs, as well as new . Newer DVD players can also read CD-R disks.
DVD uses to compress data.
Advantages- Videotape typically has a life expectancy of from only 10 to 20 years depending upon many variable factors. Though still the best medium to originate in, conversely, it's the poorest medium to archive in, due to its relatively short life.
Unlike videotape, the DVD disk is never in contact with rotating heads, head drums, capstans, pinch rollers, guide posts, bearings, audio heads or control track heads.... All of which the tape must "grind" over each time it is played. There is no mechanical wear to a DVD disk since solely a laser beam scans it.
The disk is also not susceptible to magnetic fields or serious chemical breakdown as is videotape.
Disadvantages- it will take years for movies and software to become widely available.
It can't record (yet).
It has built-in copy protection and regional lockout.
It uses digital compression. Poorly compressed audio or video may be blocky, fuzzy, and harsh.
- Floppy disk
A soft magnetic . It is called floppy because it flops if you wave it (at least, the 5¼-inch variety does). Unlike most , floppy disks are , because you can remove them from a . Disk drives for floppy disks are called floppy drives. Floppy disks are slower to than hard disks and have less capacity, but they are much less expensive. And most importantly, they are portable.
Advantages- a floppy disc is small and is took anywhere and is good to store word documents
Disadvantages- there isn’t much storage space. And they have to be formatted to be used because they can attract viruses easily
- Touch screen technology
Touch screen technology exists in PDAs more than any thing else.
Touch screens for home PCs cost a bit of money but are worth it.
Touch screen is a type of that has a touch-sensitive transparent panel covering the screen. Instead of using a such as a or , you can use your finger to point directly to on the screen.
Although touch screens provide a natural for novices, they are unsatisfactory for most because the finger is such a relatively large object. It is impossible to point accurately to small areas of the screen. In addition, most users find touch screens tiring to the arms after long use.
Advantages- touch screen technology is much easier to use they a normal screen because you can touch the screen in places that you want to use.
Disadvantages-the touch screen can break easily and can scuff from fingerprints and you will have to keep cleaning it.
- WAP
WAP stand for Wireless Application Protocol
WAP is a secure specification that allows users to access information instantly via such as mobile phones, pagers, two-way radios, smart phones and communicators.
Advantages- Wap is the Internet on your phone and is used wherever u can go and it can be used by: -
- The travelling salesman can be given access to the company's inventory data...
- The courier can update a database with delivery schedules the second he actually delivers the package and the customer can be notified the second after...
- Students can check their grades and enrol for courses even during vacations...
-
Fleet operators can check the location of vehicles online through GPS (Global Positioning System) enabled mobile devices etc.
Disadvantages- these are that it’s slow and not efficient, it isn’t completely set up and not many people have it at the moment
3.0 Conclusion
In the future Internet technology will be in every home and business through out the world. You would be able to see people when u makes a phone call just like they were next to you talking to you. You will also be able to keep in touch with who ever you want whenever you want. There is already enough technology in the world today and there will be more to come in the future.
The oldest piece of technology in this report is the floppy disc, which has been around for decades and will never go because they are small enough to carry round and they are good for storing documents on.
Internet sites I used to get my information for my report: -
this is where I found information on broadband Internet connection. The information that I found on this website was very brief and didn’t tell me much on what broadband is.
on this website I found out about ADSL. The information on this website was also brief on what ADSL is and what it’s used for.
on this web site the information was about digital broadcasting and there was quite a lot of information on this website and I checked it with my text book
is the web site I used to search for other web sites for the information I used
on this web site I found help and information on storage media.
on this web site I found out about broadband and dial up connections.