A technician is installing a PoE switch for VoIP phones. Which of the following is the technician MOST likely going to configure on the switch?

NAT (Network Address Translation) translates private IP addresses to public ones at a router or firewall and does not affect traffic prioritization on the switch.

Quality of Service classifies VoIP RTP streams and marks them with high-priority DSCP values such as Expedited Forwarding (EF - 46), giving them preferential queuing treatment on the switch. Without QoS, voice packets compete equally with bulk data, resulting in unacceptable call quality.

PAT (Port Address Translation) is a form of NAT that maps multiple private addresses to a single public IP using port numbers; it has no role in traffic prioritization for VoIP.

DHCP assigns IP addresses to devices automatically; while phones need IP addresses, DHCP configuration alone does not ensure the voice traffic quality required for VoIP calls.