hardMultiple ChoiceObjective-mapped
200-901 Practice Question: A developer is building a chat application that…
A developer is building a chat application that requires low-latency communication, and occasional packet loss is acceptable. Which transport protocol should the developer choose?
⚠ Common exam trap
Cisco often tests the distinction between transport protocols and application-layer protocols, so candidates may confuse RTP (which is not a transport protocol) with UDP, or assume QUIC is a transport protocol when it is actually an application-layer protocol built on UDP.
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
✓
UDP
UDP is the correct choice because it provides low-latency, connectionless communication without retransmission or congestion control, making it ideal for real-time chat applications where occasional packet loss is acceptable. Unlike TCP, UDP does not require a handshake or acknowledgment, minimizing delay and overhead.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
UDP
Why this is correct
UDP is connectionless and low-latency; packet loss is acceptable in this scenario.
- ✗
RTP
Why it's wrong here
RTP is an application protocol typically used for audio/video, but it runs over UDP; the question asks for transport protocol.
- ✗
QUIC
Why it's wrong here
QUIC is a reliable protocol over UDP, but it still provides reliability, which adds overhead and may not be necessary.
- ✗
TCP
Why it's wrong here
TCP adds latency due to acknowledgments and retransmissions, which may not be ideal for real-time chat.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every 200-901 question from scratch — 989 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.