200-901 Network Fundamentals Practice Question
An application uses UDP. Which characteristic is true about this application's communication?
⚠ Common exam trap
Cisco often tests the misconception that all transport protocols provide reliability, leading candidates to associate UDP with features like guaranteed delivery or retransmission, when in fact those are exclusive to TCP.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It is connectionless
UDP is a connectionless transport protocol, meaning it does not establish a dedicated end-to-end connection before sending data. This characteristic allows for low-latency, best-effort delivery without the overhead of connection setup, which is ideal for applications like DNS queries or streaming media where speed is prioritized over reliability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It guarantees packet delivery
Why it's wrong here
UDP does not guarantee delivery.
- ✗
It retransmits lost packets
Why it's wrong here
Retransmission is a TCP function.
- ✓
It is connectionless
Why this is correct
UDP sends datagrams without establishing a connection.
- ✗
It performs a three-way handshake
Why it's wrong here
Three-way handshake is TCP.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.