Which QoS model is bandwidth-dedicated to provide sufficient quality for applications that need high resolution, such as video terminals?

Best-Effort provides no bandwidth guarantees or traffic differentiation, treating all packets equally and making it entirely unsuitable for latency-sensitive, high-resolution video.

IntServ uses RSVP to reserve per-flow bandwidth end-to-end, but it does not scale to large enterprise networks due to per-flow state requirements and is not the standard model deployed for video terminal quality.

DiffServ (Differentiated Services) classifies and marks packets using DSCP values, enabling per-hop behaviors such as Expedited Forwarding (EF) that allocate dedicated bandwidth to specific traffic classes like video. In enterprise deployments, DiffServ combined with mechanisms like LLQ or CBWFQ provides the bandwidth guarantees needed for high-resolution video terminals. It is Cisco's recommended scalable QoS model for multimedia applications because it enforces policies at each hop without requiring per-flow state.

'DiffServf' is not a defined QoS model or standard - it is a typographical error and not a valid answer choice.