Question

What connectionless protocols are implemented at the lower layers of the OSI model, what is usually used to acknowledge that the data was recieved or to request the retransmission of missing data?

Answer 1

Answer:

upper-layer connection-oriented protocols

Explanation:

Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.

Answer 2

Answer:

An upper-layer, connection-oriented protocol or service

Explanation:

Connectionless acknowledgements are used to request retransmission.

Upper-layer connection-oriented protocols keeps track of the data received and can request retransmission from the upper-level protocols on the sending host.

A Network layer IP protocols manage the communication sessions if connection-oriented transport services are not available.

The best-effort delivery process guarantees that all packets that are sent are received.

Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.