Which characteristic of distributed class-based weighted fair queueing addresses jitter prevention?

Distributed Class-Based Weighted Fair Queuing (DCBWFQ) inherently provides the capability to define and group network traffic into various classes, offering granular control. This classification is a foundational characteristic that allows administrators to isolate time-sensitive applications like voice into distinct classes, thereby enabling the application of specific QoS mechanisms, such as strict priority queuing (often implemented as Low Latency Queuing on top of CBWFQ), to effectively minimize jitter for that class.

This describes the function of Low Latency Queuing (LLQ), which provides a strict priority queue for voice traffic, but it is not an inherent characteristic of standard CBWFQ itself, which focuses on weighted fairness among classes.

Similar to choice B, this directly describes LLQ, which provides a strict priority queue for voice traffic to minimize jitter, rather than a core characteristic of standard CBWFQ.

This choice is nearly identical to A, describing the ability to define custom classes, which is a key aspect of the granularity offered by CBWFQ.