You are reviewing different DSL services with a small busine

You are reviewing different DSL services with a small business customer to determine which type of service he should purchase. You tell him that some services offer the same maximum upload and download speeds, while others offer different maximum upload and download speeds. Of the following, which services offer different maximum upload and download speeds?

A. ADSL

B. HDSL

C. SDSL

D. VDSL

Solution

A and D. ADSL, or asymmetric DSL, offers maximum download speeds of between 1.5 and 9 Mbps and maximum upload speeds of between 16 to 640 Kbps. VDSL, or very high data-rate DSL, offers maximum download speeds of between 13 and 52 Mbps and maximum upload speeds between 1.5 and 6.0 Mbps.