<P> Many technologies are available for wide area network links . Examples include circuit switched telephone lines, radio wave transmission, and optic fiber . New developments in technologies have successively increased transmission rates . In ca . 1960, a 110 bit / s (bits per second) line was normal on the edge of the WAN, while core links of 56 kbit / s to 64 kbit / s were considered fast . As of 2014, households are connected to the Internet with Dial - Up, ADSL, Cable, Wimax, 4G or fiber . The speeds that people can currently use range from 28.8 Kilobits per second through a 28K modem over a telephone connection to speeds as high as 100 Gigabits per second over an Ethernet 100GBaseY connection . </P> <P> AT&T plans to start conducting trials in the year 2017 for businesses to use 400 Gigabit Ethernet . Researchers Robert Maher, Alex Alvarado, Domaniç Lavery & Polina Bayvel of University College London were able to increase networking speeds to 1.125 Terabits per second . Christos Santis, graduate student Scott Steger, Amnon Yariv, Martin and Eileen Summerfield developed a new laser that quadruples transfer speeds over fiber optic cabling . If these two technologies were combined, then a transfer speed of up to 4.5 Terabits per second could potentially be achieved, although it is unlikely that this will be commercially implemented in the near future . </P> <Ul> <Li> ATM </Li> <Li> Cable modem </Li> <Li> Dial - up </Li> <Li> DSL </Li> <Li> Frame relay </Li> <Li> ISDN </Li> <Li> Leased line </Li> <Li> SONET </Li> <Li> X. 25 </Li> <Li> SD - WAN </Li> </Ul> <Li> Dial - up </Li>

You have a wan link that connects two sites