In half-duplex communication between two hosts, both hosts can transmit, and both hosts can receive, but hosts cannot transmit and receive simultaneously.
a) true b) false

True: In half Duplex communication both of the hosts can transmit and receive. But can not do both job simultaneously.

when one host is sending other one can receive but can not transmit. And the receiving host waits for the transmitting host to finish transmitting, before it starts transmitting from it's end.

When one host is receiving other one can transmit.

For example- The communication system of army people. when one person talks the person in the other end has to wait till he finishes. They can not talk simultaneously.

Explanation:

Where in full duplex the both hosts can transmit and receive simultaneously, in half duplex system that's not possible.

b. related objects

explanation:

data is stored in related objects in an access database.

looking away, slouching, not focusing

explanation: