Which mode of Ethernet service uses a point-to-point configuration?

E-Line service is characterized by its point-to-point configuration, which is designed to provide a dedicated connection between two locations. This service type enables a direct, private link for data transmission, which is ideal for businesses that require reliable and secure communication between their sites. The E-Line service is commonly used for applications such as leased line services, where a single customer has exclusive access to the network resources over the dedicated path.

In this mode, the service provides a simple and efficient way to connect two endpoints and is primarily used for operational reasons like bandwidth guarantee and reduced latency. It contrasts with other Ethernet service modes, which can involve multiple endpoints and complex network configurations. E-LAN, E-Tree, and E-Trunk services are more suited for multi-point or complex interconnectivity scenarios, aimed at facilitating communication among several sites or organizing hierarchical structures in the network. This fundamental differentiation underscores why E-Line service exclusively employs a point-to-point structure for its operation.