Which two features will access layer switches provide support providing high-quality voice and taking advantage...

Deploy RSVP to improve VoIP QoS only where it will have a positive impact on quality and functionality where there is limited bandwidth and frequent network congestion.

Use multiple egress queues to provide priority queuing of RTP voice packet streams and the ability to classify or reclassify traffic and establish a network trust boundary.

Map audio and video streams of video calls (AF41 andAF42) to a class-based queue with weighted random early detection.

Implement IP RTP header compression on the serial interface to reduce the bandwidth required per voice call on point-to-point links.

Use 802 1Q trucking and 802.1p for proper treatment of Layer 2 CoS packet marking on ports with phones connected.