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

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Computer Networking
The network layer, in reference to the OSI model, provide

None of these
the interface between the X.25 network and packet mode device
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received
All of these

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