Computer Networking
Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?1. Half-duplex Ethernet operates in a shared collision domain.2. Half-duplex Ethernet operates in a private collision domain.3. Half-duplex Ethernet has higher effective throughput.4. Half-duplex Ethernet has lower effective throughput.

1,2 and 3
2 only
1 and 4
4 only

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Computer Networking
A WATS arrangement

is never less expensive than flat-rate service
is always less expensive than flat-rate service
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 less expensive than flat-rate service only when the number of calls is large and the duration of each is short

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