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Which xDSL flavor, appropriate for home or small office…

Which xDSL flavor, appropriate for home or small offices, delivers more bandwidth downstream than upstream
and over longer distance?

PrepAway - Latest Free Exam Questions & Answers

A.
VDSL

B.
SDSL

C.
ADSL

D.
HDSL

Explanation:
Asymmetric DSL (ADSL) provides data travel downstream faster than upstream. Upstream speeds are 128
Kbps to 384 Kbps, and downstream speeds can be as fast as 768 Kbps. Generally used by residential users.
ADSL is appropriate for small offices.
Incorrect Answers:
A: VDSL is basically ADSL at much higher data rates (13 Mbps downstream and 2 Mbps upstream).
B: Symmetric DSL (SDSL) provides data travel upstream and downstream at the same rate.
D: High-Bit-Rate DSL (HDSL) provides T1 (1.544 Mbps) speeds over regular copper phone wire without the
use of repeaters.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 699


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