Essay on Mr Yusuf

Submitted By yuyu12
Words: 1467
Pages: 6
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Unit: 11.2 Evaluate the uses and drawbacks of websites

Task 1

|Types of connections |Connection Speed |Time taken to download |
| | |100MB file |
|Dial-up |56K |0.4hrs |
|ISDN |128 Kbps |1.78hrs |
|BoardBand |24mb |0.01hrs |
|ADSL |640 Kbps |0.34hrs |
|DSL |9 Mbps |0.25hrs |
|Cable |20 Mbps |1.11hrs |
|Modem | | |
|SDSL |3 Mbps |0.074hrs |

Dial-up

Dial-up is a connection to the internet which is made by plugging your telephone line into the modem port on your computer. It requires no additional connection on top of the telephone network. In addition, dial-up is useful to travelers because telephone points are available throughout the world. The Dial-up speed is maximum of 56k and it was not possible to connect to the Internet and make telephone calls at the same time. For example, some broadband connection is impossible due to low population and demand for dail-up.

ISDN

(ISDN) Integrated Services Digital Network is a circuit-switched telephone network system, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better quality and higher data speeds than are available with analog. Furhtermore, ISDN is a set of protocols for establishing and breaking circuit switched connections. For example ISDN is an international standard for end-to-end digital transmission of voice, data and signalling.
BoardBand

Broadband is a telecommunications term that refers to a signaling method that includes or handles a relatively wide range of frequencies, which may be divided into channels or frequency bins.In addition, Broadband is always a relative term, understood according to its context in other words the boardband is wider greater and carrys information capacity. In radio, for example, a very narrow-band signal will carry Morse code a boardband which carrys speech.

ADSL

Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. It does this by utilizing frequencies that are not used by a voice telephone call. For example the ADSL provides a high speed, and it always connects that can carry both data and voice.

DSL

DSL is the family of technologies that provide digital data transmission over the wires of a local telephone network..Moreover, DSL originally stood for digital subscriber loop, although in recent years, many have adopted digital subscriber line as a more marketing-friendly term for the most popular version of consumer-ready DSL, ADSL. For example, it can carry both data and voice signals.

Cable Modem

A cable modem is a type of modem that provides access to a data signal sent over the cable television infrastructure. Furthermore, Cable modems are primarily used to deliver broadband Internet access, taking advantage of unused bandwidth on a cable television network. For example you can use the cable modem for internet or other connections which requires plugs.

SDSL

Symmetric Digital Subscriber Line (SDSL) is a broadband connection, used to transmit high-bandwidth information over ordinary telephone lines.The main difference between ADSL and SDSL is that SDSL has the same upstream data rate as downstream (symmetrical), whereas ADSL always has smaller upstream bandwidth.
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