 Many customers migrated from Frame Relay to MPLS over IP or Ethernet, which in many cases will reduce costs and improve manageability and performance of their wide area networks.While the underlying protocols and technologies are different, both MPLS and ATM provide a connection-oriented service for transporting data across computer networks.In both technologies, connections are signaled between endpoints, the connection state is maintained at each node in the path, and encapsulation techniques are used to carry data across the connection.