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

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

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
X.21 is

a method access control technique for multiple-access transmission media
a very common bit-oriented data link protocol issued by ISO
None of these
network access standard for connecting stations to a circuit-switched network
a method of determining which device has access to the transmission medium at any time

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
Communication network is

one or more conductors that serve as a common connection for a related group of devices
None of these
a collection of interconnected functional units that provides a data communications service among stations attached to the network
the condition with 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

ANSWER DOWNLOAD EXAMIANS APP