Connection-oriented Ethernet refers to the transformation of Ethernet, a connectionless communication system by design, into a connection-oriented system. The aim of connection-oriented Ethernet is to create a networking technology that combines the flexibility and cost-efficiency of Ethernet with the reliability of connection-oriented protocols. Connection-oriented Ethernet is used in commercial carrier grade networks.
Read more about Connection-oriented Ethernet: Background, PBT and PBB, T-MPLS (Transport MPLS), Achieving The Promise of Carrier-grade Ethernet