1.5 Compare TCP to UDP 200-301 Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A network engineer is designing a system for streaming live video from security cameras to a monitoring center. The video feed must have minimal delay, and occasional frame loss is acceptable because the next frame will refresh the image. Which transport protocol should be used?

   • AUDP, because it guarantees frame ordering for smooth playback
   • BTCP, because it provides flow control to prevent network congestion
   • CUDP, because it provides low overhead and best-effort delivery
   • DTCP, because it guarantees all frames arrive in order
   Reveal Solution Discussion Select an answer first
2. 27expert · hard

   A network engineer is designing a real-time multiplayer game. The game sends player positions 30 times per second. If a position update is lost, the game can interpolate from the next update. However, the game also has a chat feature where messages must be delivered in order. The engineer decides to use UDP for position updates and TCP for chat. What is the main reason for not using TCP for position updates?

   • AUDP provides guaranteed ordering of position updates
   • BTCP would cause delays due to retransmission of lost updates
   • CTCP cannot carry small packets efficiently
   • DTCP does not support multiple simultaneous connections
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A network engineer is troubleshooting a TCP connection and notices that the receiver is sending duplicate acknowledgments. What is the most likely cause?

   • AThe sender is retransmitting segments that were already received.
   • BThe network is experiencing high latency, causing ACKs to arrive late.
   • CThe receiver has received a segment out of order and is indicating the next expected sequence number.
   • DThe sender is using a small window size, causing the receiver to send duplicate ACKs.
   Reveal Solution Discussion Select an answer first
5. 29expert · hard

   A network administrator is troubleshooting a TCP throughput issue on a high-latency WAN link. The administrator observes that the sender is not utilizing the full available bandwidth. The receiver's window size is set to 64 KB, and the round-trip time is 100 ms. What is the most likely cause of the low throughput?

   • AThe sender is using UDP, which does not support flow control.
   • BThe sender is using a large window size, which is causing congestion.
   • CThe network is experiencing packet loss, but the sender is not retransmitting.
   • DThe receiver's window size is too small to fill the bandwidth-delay product.
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   Which characteristic is unique to UDP compared with TCP?

   • AIt provides reliable delivery through acknowledgments.
   • BIt has a minimal 8-byte header with low overhead.
   • CIt establishes a session before transmitting data.
   • DIt guarantees in-order delivery of datagrams.
   Reveal Solution Discussion Select an answer first