ethernet uses rj45 jack which uses max 1gbps speed...usually it is used to connecnt your pc with your router, modem or switch......it connects rj45 jack to ur ethernet slot on ur pc that comes default with motherboards or pc or lappys now a days...
dsl means Digital Subscriber Line...which has a bandwidth range of usually 8-10 mbps it comes throught copper wire like telephone line does.....and end user usually receives the connection via a dsl modem which has copper telephone wire input from isp and out put of ethernet rj45 cable to user pc, dsl usually has 1:1 download:upload speed which is costly for isps to provide so in india isps has choosen cheaper version of dsl which is adsl (Asymmetric Digital Subscriber Line) which has lower upload speed than download
metro ethernet is a service from reliance broadband where they dont use any copper wire or modem....but directly supply suscriber a ethernet cable connection which connects in his pc from reliance switches...these are very high speed connection offering speeds 10-20 mbps in selected areas...and this facility perhaps..has capacity to provides speed upto 250 mbps to end user...as there is no copper wire or copper loss direct switch to user...connection....and for field connection to the switches they use their fibre optical network which are very high speed gbps network
i hope this helps u understand.....about dsl ethernet and metro ethernet by reliance broadband.....for more knowledge please google yourself....
