To meet specific business requirements, QoS-marked traffic must be sent over a dedicated link. Which technology fulfills this requirement?

MPLS provides label-switched path forwarding and traffic engineering capabilities but does not natively route traffic to a specific link based on QoS DSCP markings.

Q-in-Q tunneling is a Layer 2 technique for stacking VLAN tags to extend L2 domains and provides no mechanism for QoS-based routing to a dedicated link.

PBR uses route maps applied to interfaces to match traffic based on IP precedence, DSCP markings, or ACLs, then sets the next-hop to a specific interface or IP address. This allows QoS-marked traffic to be steered to a dedicated link, satisfying the business requirement without altering the global routing table for all traffic.

EIGRP metric modification influences path selection for all traffic in the routing domain and cannot selectively route only QoS-marked traffic over a specific dedicated link.