Exam MTCNA Topic 3 Question 129 Discussion

Actual exam question for MikroTik's MTCNA exam
Question #: 129
Topic #: 3
Domain Name System (DNS) requests can use protocol/port:

Suggested Answer: A,B Vote an answer

DNS primarily uses UDP port 53 for most query/response operations. However, TCP port 53 is also used, particularly for larger responses (such as DNS zone transfers or DNSSEC).
* A.#UDP - Used for standard DNS queries due to lower overhead.
* B.#TCP port 53 - Used when UDP is insufficient, especially for zone transfers (AXFR/IXFR).
Extract from MTCNA Course Material - DNS and Networking Services:
"DNS typically uses UDP/53, but falls back to TCP/53 for larger queries or zone transfers." Extract from MikroTik Wiki - DNS Settings:
"DNS uses UDP for general queries. TCP is used when UDP cannot accommodate the size of the response."

by Constance at Oct 16, 2026, 07:56 AM

Limited Time Offer

15%

Off

Get Premium MTCNA Questions as Interactive Self Test Engine or PDF

Comments

Chosen Answer:
This is a voting comment (?) , you can switch to a simple comment.
Switch to a voting comment New
Nick name: Submit Cancel
A voting comment increases the vote count for the chosen answer by one.

Upvoting a comment with a selected answer will also increase the vote count towards that answer by one. So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.

Contact Us

If you have any question please leave me your email address, we will reply and send email to you in 12 hours.

Our Working Time: ( GMT 0:00-15:00 ) From Monday to Saturday

Support: Contact now 

日本語 Deutsch 繁体中文 한국어

Useful Links

Latest Updated