Design end-to-end QoS policies
3 practice questions under this official exam objective (300-420) — each with the community-verified answer, a full option-by-option explanation and instant feedback.
Shape Outbound and Police Inbound to Protect a 10 Mbps Link
On a small 10 Mbps internet handoff, traffic shaping is applied outbound to smooth egress toward the provider so bursts stay within the link bandwidth
Mark Multimedia Conferencing with DSCP AF4 (Avoid WRED)
For multimedia conferencing over MPLS, the architect classifies and marks the traffic with DSCP AF4 (video) carried in a bandwidth (allocated) queue.
Configure Explicit Trust at the DiffServ Trust Boundary (F and G)
Under a DiffServ model, the trust boundary is where untrusted or already-classified traffic enters the trusted QoS domain. Points F and G are the edge