Answer:
ERP protection
Step-by-step explanation:
Ethernet Ring Protection, or ERP, is an attempt at ITU-T under the G. 8032 Recommendation to offer sub-50ms recovery and protection switching for Ethernet traffic in a ring like topology and at the same time making sure that there loops are not formed at the Ethernet layer. G.
In recent times Ethernet Ring Protection (ERP) has emerged to offer protection switching for Ethernet ring topologies with sub-50 ms failover facilities.