Design end-to-end QoS policies
6 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
Campus QoS Design: Scavenger Queue and Queuing Placement?
This campus QoS design question asks how to protect real-time traffic during congestion while containing virus/worm floods and excessive traffic. The
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
Which QoS Model Fits 5G Backbone Marking Requirements
This 300-420 question asks which QoS model satisfies a 5G operator's marking plan of EF for conversational traffic, AF2 for streaming and AF3 for web
Which QoS Class Model Fits CS5 Broadcast?
This 300-420 QoS design question asks which Cisco QoS strategy model an ISP should deploy for a CS5-marked premium broadcast service while consuming t