Archive for the ‘I’ Category

iPlayer

September 13, 2007

iPlayer is a catch-up service developed by the BBC. It allows a user to download their favourite BBC programmes over the internet. They then have up to 30 days to watch the downloaded programme, before it deletes itself. Advertising-free programmes can be viewed for up to a week after transmission.

BBC iPlayer is currently in open Beta testing.

By Sarah at UK Broadband Finder
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ISDN – Integrated Services Digital Network

September 13, 2007

ISDN – or Integrated Services Digital Network – offers digital data transmission (including voice and video) over the existing copper wire network. It is not a broadband service and instead of a modem you use an ISDN adapter, called a terminal adapter.

Two types of ISDN are available – the Basic Rate Interface (BRI) for homes and small businesses, and the Primary Rate Interface (PRI) for large businesses and organisations.

ISDN lines offer speeds of 128 kb which, while good in comparison to dia- up, are seen as slow now that DSL broadband is so widely available. Therefore, nowadays ISDN is not a particularly useful option for domestic users.

By Sarah at UK Broadband Finder
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Broadband ISDN

September 13, 2007

Broadband ISDN takes ISDN a step further. Whereas ISDN is transmitted over the the copper wire narrowband loop, broadband ISDN (or B-ISDN) uses fibre. This means it can send and receive data (including voice, data and video) at over 150Mb.

By Sarah at UK Broadband Finder
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ICANN – Internet Corporation for Assigned Names and Numbers

September 1, 2007

The not-for-profit organisation Internet Corporation for Assigned Names and Numbers is commonly known as ICANN.

ICANN has responsibility for the following:

  • setting policy on top level domains such as .com, .org, etc
  • managing the systems for assignment of domain names
  • offering a domain name resolution service, the Uniform Domain Name Resolution Policy, for companies in dispute over domain name ownership
  • allocating space for IP addresses

Until ICANN was set up on the 1990s, these responsibilities were held by the US government.

By Sarah at UK Broadband Finder
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Instant Messaging – IM

August 14, 2007

Instant messaging, often shortened to IM, involves the sending of messages in real time between people who are online simultaneously. It differs from email messaging where messages are sent and can be downloaded and read at a later date.

IM also benefits from having fewer steps to go through to send a message, so it works well as an instant conversation. IM services often include other features such as the ability to send files and documents, and to view the person you are speaking to using a webcam and microphone.

A downside to IM is that users may need to be on the same IM service in order to communicate (although that is starting to change).

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

TCP / IP

July 19, 2007

TCP/IP, or Transmission Control Protocol/Internet Protocol, standardises communication between computers over the internet. TCP/IP can also be used in private networks.

Transmission Control Protocol (TCP) is the standard for two computers establishing a connection with each other over the internet and transmitting streams of data, and also ensuring that data packets are received in the right order.

The Internet Protocol (IP) finds out the address of the data packet and ensures it is routed to the right destination based on that address, even if there is no direct connection to that address.

Every computer with access to the internet uses TCP/IP .

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

Dynamic IP address

June 16, 2007

A Dynamic IP address is one that changes each time you go online. All computers need an IP address when they connect to the internet, so they can be identified by other computers. Websites need fixed IP addresses. However casual web browsers don’t – so they are often allocated a dynamic IP address by their internet service provider (ISP) which changes each time they go online.

An IP address is made up of four sets of numbers with each set separated by a dot. Each set of numbers is between 0 and 255. With the extraordinary growth in the numbers of people going online around the world, it is easy to see that IP addresses based on number combinations could run out.

So if an internet service provider gives a web user a dynamic IP address, it reduces the need for IP addresses in general as the IP adresses a provider owns can be re-used. The internet service provider also saves money as it only needs enough IP addresses for the number of people likely to be going online at one time, rather than having to ensure that each subscriber has a specific IP address available to them at all times (which is what it would have to do if they gave each subscriber a fixed IP address when they signed up).

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

IP Address

June 11, 2007

IP stands for Internet Protocol – and the IP address is a unique identifying address given to every computer connected to the internet. It takes the form of four sets of numbers with each set separated by a dot. Each set of numbers is between 0 and 255.

Computers accessing the internet via an ISP may be allocated a temporary IP address by their ISP for that internet visit – however a website will require a fixed IP address. Many broadband providers include a free IP address with some of their broadband packages.

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

Internet Accelerator

May 8, 2007

An internet accelerator reduces the size of each webpage before it downloads to your pc. This can be useful if you are unable to receive broadband and are stuck on dial up; or if your broadband speeds are two slow for your requirements and you are unable or unwilling to upgrade to a faster package.

Although it can’t change the actual speed of your web connection, an internet accelerator can compress each element of a web page or email using Content Sensitive Compression (‘CSC’) . Once compressed, your web pages and emails can upload and download more quickly.

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer

Internet Protocol TV – IPTV

April 3, 2007

IPTV, or Internet Protocol TV, is the transmission of television via the internet. This could mean simply watching scheduled TV programmes, or viewing television on demand with thousands of TV programmes and films available for an indvidual to watch when they want.

IPTV can be delivered over cable or ADSL (broadband via a BT phone line) – either to a pc, or to a set-top box to be watched on the TV.

Not surprisingly, it requires a high speed broadband connection to ensure quality and consistency.

By Sarah at UK Broadband Finder
Read my Broadband Glossary disclaimer