Compare and Contrast Policy-Based Routing (PBR) and Traditional Routing POWERSWITCH-CAMPUS-DEPLOY Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   What is a potential performance impact of using PBR compared to traditional routing?

   • APBR can increase CPU usage because each packet must be evaluated against policies.
   • BPBR has no impact on performance because it uses the same forwarding path as traditional routing.
   • CPBR improves performance by reducing the size of the routing table.
   • DPBR always reduces throughput because it uses a slower forwarding path.
   Reveal Solution Discussion Select an answer first
2. 32foundation · easy

   How does traditional routing interact with dynamic routing protocols?

   • AIt relies on them to learn and update routes in the routing table.
   • BIt requires manual configuration of all routes.
   • CIt uses them to define PBR policies.
   • DIt overrides the routing table with policy-based next hops.
   Reveal Solution Discussion Select an answer first
4. 33expert · hard

   A campus network has a PBR policy that sends VoIP traffic to a primary WAN link. The primary link goes down, but the PBR policy does not have a fallback. What is the most likely outcome?

   • AThe switch will send an ICMP redirect to the VoIP phones to use the backup link.
   • BVoIP traffic will be dropped because the PBR policy still points to the unreachable next hop.
   • CVoIP traffic will automatically use the backup link because the routing table has a backup route.
   • DThe PBR policy will be automatically disabled by the switch.
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5. 34foundation · easy

   How does a traditional router decide where to forward a packet?

   • ABy performing a routing table lookup based on the destination IP address
   • BBy examining the packet's source IP address and applying an access control list
   • CBy applying a policy that matches on protocol and port numbers
   • DBy sending the packet to all interfaces except the one it arrived on
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6. 35application · medium

   A campus switch is being considered for PBR to route traffic from a specific application server to a dedicated WAN link. The switch is a mid-range model that supports PBR but with limited hardware offload. The network team is concerned about the impact on forwarding performance for all traffic passing through the switch. What should they consider?

   • APBR has no impact on performance because it is only applied to specific traffic.
   • BPBR may increase CPU utilization because packets matching the policy may be processed in software if hardware offload is not available.
   • CTraditional routing would have the same performance impact as PBR in this scenario.
   • DPBR always improves performance because it reduces the routing table size.
   Reveal Solution Discussion Select an answer first