Answer:
The answer is Collision Domain.
Explanation:
Network segment where only one device can communicate at a time is known as Collision Domain. A Network Segment is a separate portion in a computer network which is connected by other portions through bridge, routers, switches, etc.
Now in this network segment, if there is a portion which allows only one device to communicate at a time, is called as Collision Domain. This is because of the fact that in such type of segments, collision may occur if the data transmission takes place simultaneously.
