Which two design characteristics of Resilient Ethernet Protocol on a Metro Ethernet infrastructure are true? (Choose two.)

REP is purpose-built for Layer 2 Ethernet ring topologies and achieves fast convergence by maintaining a single blocked port to prevent loops and pre-calculating alternate paths so that a link failure triggers near-instant reconvergence.

UDLD can be deployed alongside REP to detect physical unidirectional link conditions - such as a fiber strand failure in one direction - that REP's mechanism does not catch, providing complementary protection on ring segments.

This is false - REP explicitly supports VLAN load balancing by allowing different VLANs to use different blocked ports around the ring, distributing traffic across multiple ring segments.

REP and STP cannot operate on the same ring segment simultaneously because REP replaces STP for ring topologies and mixing both on the same ring would create conflicting loop prevention mechanisms.

REP and STP domains must be kept separate and cannot share common links or segments - their loop prevention mechanisms are incompatible and a boundary port is required where the two domains meet.