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Zorluk: KolayTCP vs UDP Comparison and Protocols

A network administrator is reviewing bandwidth efficiency for application traffic traversing a low-bandwidth WAN link. Which statement accurately compares the baseline header size overhead between Transmission Control Protocol (TCP) and User Datagram Protocol (UDP)?

  1. TCP requires a 20-byte minimum header to accommodate reliability tracking fields, whereas UDP uses an 8-byte header to minimize transmission overhead.Cevap
  2. B
    UDP requires a 20-byte header to manage packet sequencing and retransmissions, whereas TCP uses an 8-byte fixed header.
  3. C
    Both TCP and UDP utilize an identical 20-byte baseline header structure to maintain standardized Layer 4 port multiplexing.
  4. D
    TCP maintains an 8-byte header because dynamic windowing eliminates the need for header-based flow control fields.

Cevap

TCP requires a 20-byte minimum header to accommodate reliability tracking fields, whereas UDP uses an 8-byte header to minimize transmission overhead.
The option identifying TCP's 20-byte minimum header and UDP's 8-byte fixed header is correct because TCP must carry fields for flow control, error recovery, and sequencing, whereas UDP only carries basic addressing, length, and checksum information.

Adım Adım Çözüm

1
Analyze TCP header requirements
TCP is a connection-oriented, reliable protocol that requires fields for Source/Destination Ports, Sequence Number, Acknowledgment Number, Data Offset, Control Flags, Window Size, Checksum, and Urgent Pointer, consuming 20 bytes minimum.
Reliability mechanisms demand additional header fields.
2
Analyze UDP header requirements
UDP is a connectionless, best-effort protocol containing only Source Port, Destination Port, Length, and Checksum fields, totaling 8 bytes.
Absence of sequencing and flow control allows for minimal header overhead.
3
Compare protocol header sizes
TCP headers are at least 20 bytes, while UDP headers are fixed at 8 bytes.
This structural difference directly reflects their performance and reliability tradeoffs.

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