What is ADSL and SDSL?
Short answer: ADSL and SDSL differ in whether the speed is the same downloading and uploading. Long answer: ADSL (asymmetrical digital subscriber line) has a higher download speed at the cost of a slower upload speed. ADSL is what is usually found in homes. SDSL (symmetrical digital subscriber line) has the same speed both ways. SDSL is usually found in small offices and home offices.