Which EVC service type restricts connectivity between endpoints?

The E-Tree service type is designed specifically to restrict connectivity between endpoints. In an E-Tree configuration, there are typically two types of endpoints: root and leaf. The root endpoints can communicate with all leaf endpoints, but the leaf endpoints cannot communicate with each other. This characteristic makes E-Tree particularly useful for applications where a central point (the root) needs to communicate with multiple endpoints (the leaves) while preventing those endpoints from conversing directly. This model is often employed in scenarios such as providing managed service offerings where end users should not interact directly with one another, thus preserving security or network policies.

In contrast, other EVC service types like Point-to-Point and VPWS enable direct communication between the two endpoints, while VPLS offers a multipoint-to-multipoint connection where all endpoints can communicate. This distinct restriction on connectivity in E-Tree is what sets it apart from the other service types listed.