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DSL stands for the following.
The digital subscriber line technology is the most common
technology for Internet access across the UK. The advantage
of DSL is that it works upon the copper line telephone network
of the UK. Unlike with access through a fibre optic network,
which needs new cabling laid.
Before DSL was launched in the UK, dialup and ISDN (a type
of DSL) technologies were the most common ways to access the
Internet. Dialup for domestic homes, ISDN was primarily for
business usage. The problem with a dialup connection, alongside
its slow upload and download speed, was that it tied up the
telephone line when a connection to the Internet was established.
The advantage of implementing a digital subscriber line is
that it can used simultaneously alongside the telephone line.
The only requirement is the use of a DSL filter, otherwise
DSL will tie up a telephone line, just as with a dialup connection.
As of 2010, DSL supports a download speed of between 256
Kb/s to 24 Mbit/s. The problem with the UK's copper line telephone
network, is that a speed of 24 Mbit/s is rarely achievable.
In fact, the UK Government was/is attempting to meet a goal
of an average download speed of just 2 Mbit/s by 2012.
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