- A
Lower latency due to no connection setup
UDP is connectionless, reducing latency.
- B
Guaranteed delivery of all packets
Why wrong: UDP does not guarantee delivery.
- C
Reduced overhead from smaller header size
UDP header is 8 bytes vs TCP's 20+.
- D
In-order packet delivery
Why wrong: UDP does not guarantee order.
- E
Congestion control to avoid network overload
Why wrong: UDP lacks congestion control.
Question 570 of 1,000
200-901 Network Fundamentals Practice Question
This 200-901 practice question tests your understanding of network fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are benefits of using UDP over TCP for real-time applications?
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
✓
Lower latency due to no connection setup
Option A is correct because UDP does not require a three-way handshake (SYN, SYN-ACK, ACK) before data transmission, eliminating the connection setup latency inherent in TCP. This makes UDP ideal for real-time applications like VoIP or video streaming where low delay is critical.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Lower latency due to no connection setup
Why this is correct
UDP is connectionless, reducing latency.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Guaranteed delivery of all packets
Why it's wrong here
UDP does not guarantee delivery.
- ✓
Reduced overhead from smaller header size
- ✗
In-order packet delivery
Why it's wrong here
UDP does not guarantee order.
- ✗
Congestion control to avoid network overload
Why it's wrong here
UDP lacks congestion control.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that 'reliable' means 'better' for all applications, but candidates must recognize that real-time apps prioritize low latency over reliability, making UDP's lack of guarantees a feature, not a flaw.
Detailed technical explanation
How to think about this question
UDP's header is only 8 bytes (versus TCP's 20-60 bytes), reducing per-packet overhead and processing time. In real-time applications like WebRTC or live video, a lost packet is often preferable to a delayed retransmission, which would break the real-time experience. UDP also allows multicast and broadcast transmissions, which TCP cannot support.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Visual reference
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 200-901 question test?
Network Fundamentals — This question tests Network Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Lower latency due to no connection setup — Option A is correct because UDP does not require a three-way handshake (SYN, SYN-ACK, ACK) before data transmission, eliminating the connection setup latency inherent in TCP. This makes UDP ideal for real-time applications like VoIP or video streaming where low delay is critical.
What should I do if I get this 200-901 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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