Cisco 100-105 Exam

Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required?

  • A. HTTP
  • B. IP
  • C. TCP
  • D. Telnet
  • E. UDP
Answer: Option E.

UDP provides a connectionless datagram service that offers best-effort delivery, which means that UDP does not guarantee delivery or verify sequencing for any datagrams. A source host that needs reliable communication must use either TCP or a program that provides its own sequencing and acknowledgment services.

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