ADSL / VDSL
The term Asymmetric Digital Subscriber Line (ADSL) describes the most common used technology for broadband connections for consumers. It was developed on the basis of DSL technology under certain conditions one of which was that it had to use existing telephone lines without impeding telephony using the land-line connection. At the same time it had to meet the mostly asymmetrical (unequal) data transfer-rate needs for private customers at high reception- and sending rates.
The Very High-Speed Digital Subscriber Line (VDSL) is DSL technology that provides significantly higher data transfer speeds over conventional telephone lines than ADSL, for example. Like all DSL technologies, VDSL also uses the last segment of the transfer link to the customer which is a (twisted) copper line, although the media constantly and incorrectly talk about the use of fibre optic lines even for this segment.