Computer Networking
The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

cannot talk at once
can do one way data transmission only
can send or receive data one at a time
None of these
can receive and send data simultaneously

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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.

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

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Computer Networking
Demodulation is the process of

combining many low speed channels into one high speed channel
dividing the high-speed signals into frequency bands
converting analog signals to digital signals
converting digital signals to analog signals
None of these

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