A stormwater bureau needs civic voice packets to keep class treatment across an MPLS core that forwards on labels. What QoS concept maps packet DSCP into the MPLS header for core classification?
Select an answer to reveal the explanation.
Short Explanation
Once the packet is labeled, the core often never peeks at IP DSCP again — so you pipe that marking into the EXP/TC bits at imposition. Think of EXP as the colored sticker on the shipping label that voice wears across the stormwater MPLS cloud.
Full Explanation
MPLS QoS commonly maps IP DSCP (or equivalent) into the 3-bit EXP/Traffic Class field at label imposition so P routers can classify and queue labeled packets without IP deep inspection. That preserves civic voice treatment across the core. Flow labels, random EXP, or RDs are not QoS marking mechanisms. Design the DSCP-to-EXP policy at PE edges and keep consistent PHBs through the label-switched domain.