Answer:
Best effort
Step-by-step explanation:
Protocols are the methods by which data is transferred in a network. These can be in different categories depending on user requirements and cost the user is willing to incur.
The best effort protocol is a network that does not guarantee efficient data a delivery and quality of delivery is not required to meet any quality of service.
For example network dealt and occurrence of packet loss will rely on how congested the network is.
It offers no built-in error-checking or retransmission capability uses.
The opposite of this is reliable delivery that ensures a level of quality service.