Computer Networking
Communication circuits that transmit data in both directions but not at the same time are operating in

a half-duplex mode
an asynchronous mode
None of these
a simplex mode
a full-duplex mode

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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.

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

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Computer Networking
ARP (Address Resolution Protocol) is

a TCP/IP high level protocol for transferring files from one machine to another
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
None of these
a protocol that handles error and control messages
a protocol used to monitor computers

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