Final answer:
The Zero Capacity queue is referred to as a message system with no buffering. Incoming messages are immediately transmitted or discarded if transmission is not possible.
Step-by-step explanation:
The Zero Capacity queue is referred to as a message system with no buffering. It means that the queue does not have any space to store messages, so when a new message arrives, it is immediately transmitted or discarded if it cannot be transmitted. This type of queue is commonly used in real-time systems where message delivery must occur without delay.
For example, in a computer network, if a packet arrives at a router with a zero capacity queue, and there is no immediate transmission path available, the packet will be dropped.
In summary, the Zero Capacity queue is a message system with no buffering, where incoming messages are either immediately transmitted or discarded if transmission is not possible.