Which two features describe TI-LFA? (Choose two.)

TI-LFA computes a backup repair path by identifying P (Post-convergence path neighbor from PLR) and Q (node further along the post-convergence path that can reach the destination without traversing the protected resource) nodes. This ensures the computed backup path is loop-free from the perspective of the protected destination on the post-convergence path.

TI-LFA considers the entire post-convergence path and its properties, not just the isolated next-hop neighbor, to ensure loop-freedom for the repair path.

TI-LFA is a Segment Routing FRR mechanism and does not depend on LDP capability for PQ nodes; it uses SR identifiers (SIDs) for its operations.

TI-LFA explicitly relies on the concept of P and Q nodes to compute its backup path, and its primary focus is 100% coverage for single link/node failures, not 'double segment failure protection'.

A fundamental aspect of TI-LFA is that it computes a backup path that emulates the behavior of the post-convergence path, meaning the repair tunnel effectively routes traffic along the path that the network would eventually use after a failure has fully converged, thus preventing transient loops.