A service provider is designing a new backbone based on an IGP and MPLS what are two valid reasons for implementing MPLS-TE as well? (Choose two)

Sub-second rerouting is delivered by the MPLS-TE Fast Reroute (FRR) feature, which is one capability within MPLS-TE rather than a standalone justification; alternative mechanisms such as IP FRR and Loop-Free Alternates can also achieve sub-second recovery without deploying full MPLS-TE.

MPLS-TE has no role in detecting neighbor failures faster than IGPs; rapid failure detection is the responsibility of BFD, which operates independently of whether MPLS-TE is present.

MPLS-TE allows operators to signal separate label-switched paths (LSPs) for different QoS service classes, enabling differentiated forwarding across distinct network paths - something a pure IGP cannot do because it routes all traffic on the same shortest path regardless of traffic type.

MPLS-TE uses RSVP-TE to establish explicit LSPs following administrator-defined paths that are completely independent of the IGP topology, enabling pre-provisioned backup tunnels that protect against link or node failures without relying on IGP reconvergence.

RSVP serves as the signaling protocol used by MPLS-TE to establish LSPs, so MPLS-TE depends on RSVP - not the reverse; RSVP can also be deployed for other purposes without MPLS-TE.