Computer Networking
The method of communication in which transmission takes place in both directions, but only one direction at a time is called

Full Duplex
Simplex
Four wire circuit
Half Duplex

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

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Computer Networking
Contention is

One or more conductors that serve as a common connection for a related group of devices
a collection of interconnected functional units that provides a data communications service among stations attached to the network
None of these
the condition when two or more stations attempt to use the same channel at the same time
a continuous frequency capable of being modulated or impressed with a second signal

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