Which two QoS models should be part of a network redesign to ensure that IP QoS is deployed to support data, voice and videos application? (Choose two)

Integrated Services (IntServ) uses RSVP signaling to reserve bandwidth and resources along the entire end-to-end path before data transmission begins, providing guaranteed QoS for delay-sensitive traffic like voice and video.

DiffServ does not manage resources for individual user packets on a per-flow basis - it applies aggregate class-based treatment, which is a fundamental distinction from per-flow resource management.

Differentiated Services (DiffServ) classifies traffic into multiple service classes and marks packets directly in the IP header DSCP field, enabling scalable per-hop forwarding behaviors across the network without per-flow signaling.

End-to-end resource reservation before data transmission is the defining mechanism of IntServ using RSVP, not DiffServ - conflating this behavior with DiffServ misidentifies the model.

Categorizing traffic into classes using in-header markings is the defining behavior of DiffServ, not IntServ - IntServ operates via RSVP signaling and does not rely on per-class markings in the packet header.