1.4 Describe QoS Architecture 350-501 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A service provider is deploying DS-TE and must choose between MAM and RDM for bandwidth constraints. The provider has three classes: voice, video, and data. Voice is critical and must never be blocked by video or data reservations. Video is less critical but should be able to use idle data bandwidth. Data is best-effort. Which model should be used?

   • AClass-Based Tunnel Selection (CBTS)
   • BPolicy-Based Tunnel Selection (PBTS)
   • CRussian Doll Model (RDM)
   • DMaximum Allocation Model (MAM)
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A service provider is establishing trust boundaries for a new MPLS VPN service. The provider wants to trust customer markings at the CE-to-PE interface, but also wants to prevent customers from abusing high-priority markings. The provider has decided to re-mark all traffic that exceeds the contracted rate. Where should the trust boundary and re-marking policy be applied?

   • ATrust at PE ingress, re-mark at PE egress
   • BTrust all markings, no re-marking
   • CTrust at core, re-mark at CE
   • DTrust at CE, re-mark at PE ingress based on contracted rate
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   An enterprise customer requires that its DSCP markings be honored and potentially re-marked by the service provider across the entire MPLS path, including the egress customer edge. The provider must ensure that any QoS policy applied in the core is reflected in the markings delivered to the customer. Which MPLS QoS model should be used?

   • AIntServ model
   • BShort Pipe model
   • CUniform model
   • DPipe model
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A service provider is designing DS-TE bandwidth constraints for three classes: voice (high priority), video (medium), and data (low). The provider wants to ensure that voice can never be blocked by video or data reservations, but also wants to maximize utilization by allowing voice to use idle bandwidth from lower classes. Which bandwidth constraint model should be used?

   • AClass-Based Tunnel Selection (CBTS)
   • BMaximum Allocation Model (MAM)
   • CPolicy-Based Tunnel Selection (PBTS)
   • DRussian Doll Model (RDM)
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   In the Maximum Allocation Model (MAM) for MPLS TE bandwidth constraints, how is bandwidth allocated among different classes?

   • ABandwidth is shared dynamically among all classes based on demand.
   • BHigher-priority classes can preempt bandwidth from lower-priority classes.
   • CEach class has a fixed maximum allocation and no sharing occurs.
   • DEach class can use up to the total available bandwidth if other classes are idle.
   Reveal Solution Discussion Select an answer first