1.4 Describe QoS Architecture 350-501 Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A service provider is designing QoS for a new service that requires both per-flow guarantees for a critical application and scalable class-based treatment for all other traffic. The provider wants to avoid the scalability issues of per-flow reservations while still providing a guaranteed service for the critical application. Which approach should be used?

   • AUse DiffServ for all traffic
   • BUse IntServ for all traffic
   • CUse MPLS TE with MAM for all traffic
   • DUse IntServ for the critical application and DiffServ for other traffic
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   Which statement accurately describes Policy-Based Tunnel Selection (PBTS) in MPLS TE?

   • AIt automatically creates a new tunnel for each policy rule.
   • BIt selects tunnels based on the QoS marking of the traffic.
   • CIt uses policy rules to select tunnels based on QoS attributes and other packet characteristics.
   • DIt is used only for traffic that has been marked with a specific DSCP value.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   What does it mean to 'trust' QoS markings at a trust boundary?

   • AThe router ignores the markings and applies its own default QoS.
   • BThe router only trusts markings from certain source IP addresses.
   • CThe router uses the incoming QoS markings for further QoS treatment.
   • DThe router re-marks all packets to a default value.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A service provider is implementing MPLS QoS and must satisfy two customers: Customer A requires that its DSCP markings be preserved end-to-end, while Customer B requires that the provider's re-marking be visible at the egress edge. The provider wants to use a single MPLS QoS model for both customers. Which model should be used?

   • ANo single model can satisfy both requirements
   • BPipe model
   • CShort Pipe model
   • DUniform model
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the purpose of Class-Based Tunnel Selection (CBTS) in MPLS TE?

   • ATo dynamically create a new tunnel for each traffic flow.
   • BTo map different classes of traffic to different MPLS TE tunnels based on QoS requirements.
   • CTo select a tunnel based on the source IP address of the traffic.
   • DTo select a tunnel based on the destination IP address of the traffic.
   Reveal Solution Discussion Select an answer first