9. Explain the Impacts of Network Constraints on Applications 200-901 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A company uses a cloud-based VoIP service. Employees report that call quality degrades during peak hours. The network team measures the following: average latency 80 ms, jitter 15 ms, packet loss 0.5%. The company's internet link is 100 Mbps, and utilization is 90% during peak hours. What is the most likely cause of the call quality issues?

   • AHigh link utilization is causing congestion, which increases jitter and packet loss.
   • BThe jitter of 15 ms is too low for VoIP.
   • CThe average latency of 80 ms is too high for VoIP.
   • DThe packet loss of 0.5% is too low to affect VoIP.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A company's remote employees use a video conferencing application that requires 2 Mbps per stream. The site's WAN link is 50 Mbps, but during peak hours, 30 employees simultaneously join video calls. Users report poor video quality and frozen screens. The network team suspects bandwidth saturation. What is the most effective immediate action to improve the video experience?

   • AIncrease the WAN link bandwidth to 100 Mbps.
   • BImplement QoS to prioritize video conferencing traffic and limit other non-critical traffic.
   • CDisable TCP window scaling on the routers.
   • DConfigure the video application to use UDP instead of TCP.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A company runs a real-time multiplayer game server. The game requires low latency and low jitter. The network team is configuring QoS on the router. Which queuing method is most appropriate for the game traffic?

   • AWeighted Fair Queuing (WFQ) with equal weights for all traffic.
   • BLow Latency Queuing (LLQ) with a strict priority queue for game traffic.
   • CClass-Based Weighted Fair Queuing (CBWFQ) without a priority queue.
   • DFirst-In, First-Out (FIFO) queuing.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A network administrator notices that during peak hours, the router's output queue on the WAN interface is consistently full, and the drop counter is increasing. Users complain about slow application performance. What is the most effective QoS strategy to mitigate this?

   • AApply traffic shaping to limit the rate of non-critical traffic and use WRED for lower-priority traffic.
   • BDisable the output queue to allow packets to be sent immediately.
   • CIncrease the output queue length to accommodate more packets.
   • DUse FIFO queuing to ensure all packets are treated equally.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   A network designer is choosing between a full-mesh and a hub-and-spoke topology for connecting branch offices. Which design choice is most likely to improve application performance by reducing the number of hops?

   • AFull-mesh topology
   • BHub-and-spoke topology
   • CRing topology
   • DBus topology
   Reveal Solution Discussion Select an answer first