MS-700 Configure and Manage a Teams Environment Practice Question
A network administrator needs to open the correct firewall ports to ensure that Microsoft Teams media traffic (audio/video) can flow properly. Which port range and protocol are primarily used for Teams media traffic?
⚠ Common exam trap
MS-700 often tests the confusion between signaling ports (443) and media ports (UDP 3478-3481), or between primary UDP media and TCP fallback, causing candidates to pick 443 as the 'media' answer.
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 ports 3478-3481
Microsoft Teams media traffic (audio, video, screen sharing) primarily uses UDP ports 3478 through 3481, which support the STUN/TURN protocols used for NAT traversal and media relay. Opening this range is essential for reliable real-time media flow.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
TCP ports 80 and 443
Why it's wrong here
TCP ports 80 and 443 are used for standard web traffic and signaling in Teams. While necessary for the client to connect to the service and download content, they are not the primary ports used for the real-time transmission of audio and video streams in a meeting.
- ✓
UDP ports 3478-3481
Why this is correct
UDP ports 3478, 3479, 3480, and 3481 are the specific ports used by the Teams client for media traffic. Opening these ports ensures that audio, video, and screen sharing data can be transmitted efficiently with minimal delay, which is critical for the performance of real-time communication.
- ✗
TCP ports 50000-50059
Why it's wrong here
These ports were commonly used in older versions of Skype for Business for media traffic. While Microsoft Teams can fall back to different ports if necessary, the modern standard and recommended configuration for the Teams service focuses on the 3478-3481 UDP range for optimized media delivery.
- ✗
UDP port 53
Why it's wrong here
UDP port 53 is the standard port used for DNS (Domain Name System) queries. While the Teams client needs DNS to resolve the addresses of Microsoft services, this port is not involved in the actual transmission of audio or video data between participants in a Teams meeting.
Visual reference
About these practice questions
One of 211 original MS-700 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This MS-700 practice question is part of Courseiva's free Microsoft 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 MS-700 exam.