Examkin

Question

Difficulty: HardTCP vs UDP Comparison and Protocols

During an operational review of network infrastructure policies across an enterprise gateway router, a network specialist is defining classification parameters for transport layer protocols. Which two statements accurately describe the architectural characteristics and operational mechanics of the User Datagram Protocol (UDP) compared to Transmission Control Protocol (TCP)? (Select two.)

  1. UDP operates as a connectionless protocol that avoids state maintenance and establishment handshakes prior to transmitting data.Answer
  2. UDP utilizes a fixed 8-byte header field structure that lacks sequence numbering and receiver window fields.Answer
  3. C
    UDP guarantees segment arrival by automatically retransmitting lost packets when application-layer acknowledgments are missed.
  4. D
    UDP dynamically controls sender transmission speeds using a variable windowing field in response to network congestion.

Answer

The correct statements are that UDP operates as a connectionless protocol without maintaining connection state, and that UDP utilizes a compact fixed 8-byte header that excludes sequence numbers and windowing controls.
The statements confirming UDP's connectionless operation and its fixed 8-byte header without sequence or window fields are correct. UDP avoids pre-transmission handshakes to reduce latency and maintains minimal protocol overhead by using an 8-byte header consisting solely of Source Port, Destination Port, Length, and Checksum.

Step-by-Step Solution

1
Analyze transport layer connection initialization characteristics for UDP.
UDP is connectionless, requiring no initial three-way handshake (SYN, SYN-ACK, ACK) or state table allocation on network interfaces.
Connecting endpoints can immediately send datagrams without setup delay.
2
Examine the transport header structure of UDP versus TCP.
A standard UDP header consists of 4 fields (Source Port, Destination Port, Length, Checksum) totaling 8 bytes, whereas TCP headers are at least 20 bytes long and include Sequence Number, Acknowledgment Number, Window Size, and Control Flags.
Lacking sequence numbers and windowing fields keeps the UDP header minimal.
3
Evaluate transport-layer reliability and flow control features in UDP.
UDP offers best-effort delivery without built-in segment retransmission, sequencing, or windowing flow control mechanisms.
Protocol mechanisms like retransmission and dynamic sliding windows belong to TCP.

Key Concept

UDP vs TCP Transport Protocol Characteristics and Header Comparison
Rate this question

Topics

TCP vs UDP Comparison and Protocols

More questions from this topic