2.7 User and Application Experience 400-007 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In network design, what is the primary trade-off when deciding to implement redundant links for high availability?

   • ADecreased security versus increased performance
   • BIncreased cost versus improved availability
   • CLower latency versus higher packet loss
   • DSimpler management versus reduced scalability
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A company is implementing QoS on its WAN edge. The network carries VoIP, video conferencing, and web browsing. The design must ensure that VoIP and video are not dropped during congestion, but web browsing should be limited. Which QoS mechanism should be used?

   • AUse CBWFQ with a class for web browsing that has a high bandwidth allocation.
   • BUse FIFO queuing and increase bandwidth on the WAN link.
   • CUse WFQ for all traffic and rely on the default weights.
   • DUse LLQ for VoIP and video, and apply a policer to web browsing traffic.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   For a bulk data transfer application, which performance metric is typically the most critical?

   • ALatency
   • BJitter
   • CThroughput
   • DPacket loss
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An enterprise is migrating its data center to a new design that uses a centralized management plane for network configuration. Users report that application performance has degraded after the migration. Which control or management plane design choice is most likely to have caused this degradation?

   • AThe management plane is now out-of-band, but the control plane uses a routing protocol that sends frequent updates.
   • BThe management plane now uses the same network path as user data, and heavy management traffic is competing with application traffic.
   • CThe data plane now uses hardware-based forwarding, which is faster, but the control plane has a slower convergence time.
   • DThe control plane now uses a distributed routing protocol that converges faster, but the management plane is centralized and polls devices frequently.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   Which QoS mechanism is used to smooth out traffic bursts by buffering excess packets?

   • APolicing
   • BMarking
   • CClassification
   • DShaping
   Reveal Solution Discussion Select an answer first