BROADBAND

BROADBAND

Internet:
Internet access is the means by which individual terminals, computers, mobile devices, and local area networks are connected to the global Internet. Internet access is usually sold by Internet Service Providers (ISPs) that use many different technologies offering a wide range of data rates to the end user. Consumer use first became popular through dial-up connections in the 1980s and 1990s. By the first decade of the 21st century, many consumers had switched away from dial-up to dedicated connections, most Internet access products were being marketed using the term "broadband",

Broadband defn:
Broadband refers to telecommunication that provides multiple channels of data over a single communications medium, typically using some form of frequency or wave division multiplexing.
Broadband refers to high-speed data transmission in which a single cable can carry a large amount of data at once. The most common types of Internet broadband connections are cable modems (which use the same connection as cable TV) and DSL modems (which use your existing phone line). Because of its multiple channel capacity, broadband has started to replace baseband, the single-channel technology originally used in most computer networks.

Types of broadband:
1.DSL Broadband
(i)Digital Subscriber Line (DSL) is a technology that delivers broadband over your phone line to be used in the home or office.
(ii)With DSL technology, large volumes of information are sent over a copper cable at rapid speeds.
(iii)DSL allows you to download web pages, text, graphics, music and video in real time.
2.ADSL Broadband
(i)Asymmetric Digital Subscriber Line (ADSL) is a technology similar to the DSL technology.
(ii)With ADSL, information is downloaded more rapidly than it is uploaded.
(iii)ADSL is particularly useful for homes and businesses as it can download web pages and files at fast speeds.
(iv)ADSL2 and ADSL2+ are new technologies offered by some providers offering speed up to 24Mbps. One provider offering this service is Be.
3.Symmetric Broadband (SDSL)
(i)Symmetric broadband (SDSL) is a technology similar to ADSL broadband.
(ii)SDSL broadband downloads information at the same speed as it uploads information. Whereas ADSL broadband downloads the information faster than it uploads it.
(iii)This type of broadband requires an extra telephone line.
(iv)SDSL broadband is particularly suitable for businesses that send large volumes of information.

Local Loop Unbundling
1.Local Loop Unbundling (LLU) is where ADSL or SDSL broadband technologies are provided without using the British Telecom’s exchange system.
2.This means that LLU providers can offer broadband features at a competitive price.
3.LLU is only available in certain parts of UK. Providers include Bulldog and Be.

Cable Broadband
1.There are several ways in which broadband can be delivered to your PC, this type of broadband is delivered through a cable.
2.Cable companies also offer television and telephone packages as well as broadband Internet services.
3.Cable companies provide broadband, television or phone packages to about 45% of homes and businesses in the UK.
4..You can only get cable broadband if a company has cabled your street.
5.Cable providers include ntl.

Satellite Broadband
1.There are several ways in which broadband can be delivered to your PC,PC; this type of broadband is delivered through a satellite.
2.To receive satellite broadband you must have a dish antenna, and can be used almost everywhere in the UK.
3.There are 2 types of satellite services:
  1.One-way satellite services download information via satellite and upload information via a telephone or IDSN line.
  2.Two-way satellite services download and upload information via satellite. This provides an even higher bandwidth and a faster speed.
4.Satellite transmission may be affected by weather conditions.
5.The cost of installing and running satellite broadband can be quite expensive compared with other types of broadband.
6.Satellite broadband generally has quite high latency (ping times) compared to other broadband, and so is unsuitable for certain types of Internet Access such as online gaming.

Wireless Broadband
1.Wireless broadband is one of the ways in which broadband can be delivered to your PC.
2.This type of broadband requires an antenna to be installed to get connection to the Internet.
3.Wireless broadband is particularly suitable for distributing information between buildings and for homes where access to ADSL or cable broadband is unavailable.
Broadband application:
The use of broadband in national initiatives such as medical and healthcare, public safety, consumer protection, government, education, energy and environment, civic engagement, and economic development.

Advantages of Broadband over Dialup:
The advantages of broadband over dial-up connections are many and include:
1.Rapid loading of web pages and e-mail (as much as 100 times faster)
2.Equally fast downloading of files, programs, and computer updates
3. More efficient use of time online -- no more waiting for pages to load
and no more dropped telephone signals!
4.No need to tie up a telephone line or support the cost of a second telephone line
5.An always-on connection, ready when you are to access the outside world
6.The ability to easily stream video and music -- this could be a whole new experience for many people
7.More efficient delivery of photos and other large e-mail attachments
8.The ability to enable Vonage, Skype or other low-cost (or no-cost) voice-over-IP telephone communications systems
9.Technology which enables people to work from home
In short, broadband Internet considerably improves your online experience and reduces the frustration which now plagues dial-up users.

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