Computer Networking
Alex is required to provide information on how many people are using the network at any one time. Which network will enable him to do so?

Server-based
Token-Ring
Star
Peer-to-peer
Ethernet

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Computer Networking
A WATS arrangement

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

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Computer Networking
The main difference between synchronous and asynchronous transmission is

None of these
the bandwidth required is different
the clocking is derived from the data in synchronous transmission
the pulse height is different.
the clocking is mixed with the data in asynchronous transmission

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Computer Networking
Demodulation is a process of

multiplexing various signals into one high speed line signals
performing data description.
converting analog to digital signals
converting digital to analog signals

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Repeaters cannot increase the signal strength sufficiently
"Line echo" occurs due to the impedance of the cable
Cable terminators do not reflect the signal properly
Cable terminators do not absorb the signal properly
Network collisions occur

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