Which QoS marking is used when an administrator configures voice call signaling?

AF41 (Assured Forwarding Class 4, Drop Precedence 1) is typically used for video conferencing or mission-critical data, not voice signaling.

CS3 (Class Selector 3) is the recommended DiffServ Code Point (DSCP) for voice call signaling traffic. This marking places the signaling packets into a medium-priority queue, ensuring that call setup and teardown messages are delivered reliably without impacting real-time voice media which uses EF.

CS4 (Class Selector 4) is generally used for real-time interactive applications or broadcast video, not specifically voice signaling.

EF (Expedited Forwarding) is primarily used for real-time voice media (RTP streams) to provide the lowest latency and jitter, not for the signaling itself.