You are tasked with the design of a high available network. Which two features provide fail closed environments? (Choose two.)

EIGRP is fail-closed because when a neighbor adjacency goes down, it immediately removes all routes learned through that neighbor, dropping traffic destined via that path rather than forwarding it over a failed link.

RPVST+ is fail-closed because it actively blocks ports during topology changes to prevent Layer 2 loops, ensuring that a failure causes the affected path to be shut down rather than left in an indeterminate state.

MST maps multiple VLANs to fewer spanning tree instances and is optimized for scale rather than rapid fail-closed convergence, making it less suited for guaranteeing a fail-closed posture compared to RPVST+.

L2MP is not a widely standardized high-availability protocol and does not define a fail-closed behavior that would qualify it for this design requirement.