GCIA · Question #87
Which of the following statements are true about UDP? Each correct answer represents a complete solution. Choose all that apply.
The correct answer is A. TFTP uses a UDP port for communication. B. UDP is an unreliable protocol. E. UDP is a connectionless protocol.. UDP is a connectionless, unreliable transport-layer protocol used by TFTP and other applications that prioritize speed over guaranteed delivery.
Question
Which of the following statements are true about UDP? Each correct answer represents a complete solution. Choose all that apply.
Options
- ATFTP uses a UDP port for communication.
- BUDP is an unreliable protocol.
- CFTP uses a UDP port for communication.
- DUDP works at the data-link layer of the OSI model.
- EUDP is a connectionless protocol.
How the community answered
(29 responses)- A69% (20)
- C10% (3)
- D21% (6)
Why each option
UDP is a connectionless, unreliable transport-layer protocol used by TFTP and other applications that prioritize speed over guaranteed delivery.
TFTP (Trivial File Transfer Protocol) uses UDP port 69 because it is designed for simple, low-overhead file transfers that do not require TCP's reliability mechanisms.
UDP is unreliable because it provides no acknowledgment, sequencing, or retransmission of lost packets - delivery is best-effort with no guarantees.
FTP uses TCP on ports 20 (data) and 21 (control) because it requires reliable, ordered, and error-checked delivery of file data.
UDP operates at the Transport layer (Layer 4) of the OSI model, not the Data-Link layer (Layer 2), which handles framing and MAC addressing.
UDP is connectionless because it transmits datagrams without establishing a session or performing a handshake, allowing faster but unverified communication.
Concept tested: UDP characteristics and transport-layer protocol usage
Source: https://www.rfc-editor.org/rfc/rfc768
Topics
Community Discussion
No community discussion yet for this question.