In QoS tagging, PCP stands for which term?

• A. Protocol Control Point
• B. Packet Classification Point
• C. Path Control Point
• D. Priority Code Point

Answer: (D)

In QoS tagging, the term is Priority Code Point. The Priority Code Point is a 3-bit field in the IEEE 802.1Q VLAN tag that carries the traffic’s priority level. Switches and other network devices use this value to decide how to queue and forward frames, giving higher-priority traffic (higher PCP values) preferential treatment to meet QoS requirements. The field defines eight possible priority levels (0 through 7), independent of IP-level markings like DSCP. The other phrases listed aren’t standard terms used for this VLAN-tag priority indicator, so they don’t fit the concept.