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Zorluk: OrtaConnection-Oriented vs Connectionless Protocols

A network administrator is auditing network traffic generated by an automated asset tracking system. The system continuously sends brief location update bursts from handheld scanners to a central server using User Datagram Protocol (UDP). During peak operational hours, some location update packets are dropped due to network congestion, but the server does not request retransmissions. Which characteristic of UDP explains why packet retransmission is not automatically performed at the Transport layer?

  1. UDP is a connectionless protocol that does not establish session state or track packet delivery using sequence numbers and acknowledgments.Cevap
  2. B
    UDP relies on Layer 3 Internet Control Message Protocol (ICMP) flags to manage sliding window mechanisms and packet recovery.
  3. C
    UDP requires the Session layer to perform a three-way handshake prior to initiating frame retransmissions.
  4. D
    UDP is a connection-oriented protocol that delegates packet recovery responsibility exclusively to Physical layer media access controls.

Cevap

UDP is connectionless and does not maintain session state, sequence numbers, or transmission acknowledgments at the Transport layer.
The correct choice highlights that UDP is a connectionless protocol. It does not perform a connection handshake, track payload delivery, or assign sequence numbers to datagrams. Consequently, it operates with minimal header overhead and lower latency, leaving any error recovery or retransmission functions to the application layer if required.

Adım Adım Çözüm

1
Analyze the operational requirements described in the scenario.
The application transmits continuous data bursts via UDP, prioritizing minimal overhead and latency, while accepting packet loss during congestion.
Understanding why packet loss occurs without automatic recovery requires analyzing UDP protocol header structures and behaviors.
2
Evaluate protocol features of UDP at Layer 4.
UDP features a minimal 8-byte header lacking sequence numbers, acknowledgment numbers, and window size fields.
Without these fields, UDP cannot track missing datagrams or negotiate retransmissions natively.
3
Differentiate connection-oriented and connectionless Transport layer behaviors.
TCP handles packet sequencing and retransmissions at Layer 4, whereas UDP delegates reliability concerns (if needed) entirely to upper-layer applications.
Connectionless protocols provide best-effort delivery without connection handshakes or state tracking.

Anahtar Kavram

Connectionless transport protocols prioritize low overhead by omitting connection setup, sequencing, and flow control mechanisms.
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Connection-Oriented vs Connectionless Protocols

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