what is the relationship between connection oriented and connectionless
They are the connection-oriented method and the connectionless method: 1  Connection-oriented Requires a session connection (analogous to a phone call) be established before any data can be sent. 2  Connectionless Does not require a session connection between sender and receiver. The sender simply starts sending packets (called datagrams) to the destination. This service does not have the reliability of the connection-oriented method, but it is useful for periodic burst transfers.