If you had a choice between DSL and cable modem, which would provide the highest potential data rate?
What will be an ideal response?
In theory, a cable system can support data rates of 52 Mbps downstream and 512 Kbps
upstream. In practice, the rate can be much less. First, the data rate of a cable modem only pertains to
communication between the local cable office and the subscriber’s site. Second, the bandwidth is
shared among a set of N subscribers, where the size of the set is controlled by the cable provider.
From a subscriber’s point of view, sharing the bandwidth with other subscribers can be a
disadvantage because the effective data rate available to each individual subscriber varies over time.
In the worst case, if N subscribers share a single frequency, the amount of capacity available to an
individual subscriber will be 1/N. DSL provide constant or near-constant service. So the decision of
selecting DSL or cable modem will depend on the type of application/environment.
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