Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
None of these
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is never less expensive than flat-rate service
is always less expensive than flat-rate service

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Computer Networking
What does a VLAN do?

Provides multiple collision domains on one switch port.
Breaks up broadcast domains in a layer 2 switch internetwork.
Acts as the fastest port to all servers.
Provides multiple broadcast domains within a single collision domain.

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