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Difficulty: MediumTCP vs UDP Comparison and Protocols

A network administrator is evaluating transport layer protocol characteristics for two distinct enterprise applications: a database replication service requiring guaranteed in-order data transfer, and a emergency voice alert system prioritizing minimum transmission delay. Which statements correctly distinguish how TCP and UDP support these requirements? (Select TWO.)

  1. TCP utilizes sequence numbers and acknowledgments to ensure reliable, ordered byte-stream delivery for data replication.Answer
  2. B
    UDP provides flow control for voice alerts by dynamically adjusting sender window size based on buffer availability.
  3. UDP operates with a fixed 8-byte header and avoids connection handshake latency, making it suitable for real-time voice delivery.Answer
  4. D
    TCP reduces protocol overhead by operating in a connectionless mode during large database file transfers.

Answer

TCP guarantees reliable in-order delivery using sequence numbers and acknowledgments, while UDP provides low overhead with an 8-byte header and connectionless transmission ideal for latency-sensitive applications.
TCP is connection-oriented and uses sequence numbers along with acknowledgment numbers to track stream state and guarantee in-order delivery. Conversely, UDP is connectionless and lightweight, utilizing a small 8-byte header to eliminate transmission overhead for latency-sensitive traffic such as voice broadcasts.

Step-by-Step Solution

1
Analyze transport protocol requirements for the database replication service.
Database replication requires absolute data accuracy, loss detection, and in-order delivery, which demands TCP features like sequencing, ACKs, and retransmission.
Data integrity takes priority over transport latency.
2
Analyze transport protocol requirements for the voice alert system.
Voice traffic is sensitive to delay and jitter but can tolerate minor packet loss, making UDP the ideal choice due to its low 8-byte overhead and lack of handshake delays.
Connectionless best-effort delivery prevents head-of-line blocking.
3
Evaluate protocol features against provided options.
The options describing TCP sequencing/ACK reliability mechanics and UDP minimal 8-byte header/connectionless operation accurately state protocol behaviors.
Flow control and connectionless bulk transfer assertions misplace TCP and UDP mechanics.

Key Concept

TCP vs UDP Characteristics and Header Comparison
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Topics

TCP vs UDP Comparison and Protocols

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