200-901 Network Fundamentals Practice Question
Which TWO of the following protocols use UDP as the transport layer protocol? (Choose two.)
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
✓
DNS
DNS and DHCP use UDP because they are lightweight and can tolerate some loss. HTTP uses TCP, and SMTP uses TCP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DNS
Why this is correct
DNS uses UDP for queries (and TCP for zone transfers).
- ✗
HTTP
Why it's wrong here
HTTP uses TCP.
- ✓
DHCP
Why this is correct
DHCP uses UDP.
- ✗
SMTP
Why it's wrong here
SMTP uses TCP.
- ✗
SSH
Why it's wrong here
SSH uses 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.