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220-1201 Practice Question: A technician is troubleshooting a VoIP phone that…
A technician is troubleshooting a VoIP phone that cannot register with the SIP server. The phone has a valid IP address and can ping the server. Which port should be verified as open for SIP traffic?
⚠ Common exam trap
CompTIA often tests the distinction between SIP (port 5060) and other common protocols like HTTP (80), HTTPS (443), or H.323 (1720), expecting candidates to confuse VoIP signaling ports with web or video conferencing ports.
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
✓
Port 5060
SIP (Session Initiation Protocol) uses UDP or TCP port 5060 by default for signaling between endpoints and the SIP server. Since the phone has a valid IP and can ping the server, the issue is likely a firewall blocking port 5060, preventing registration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Port 80
Why it's wrong here
Port 80 is for HTTP, not SIP registration.
- ✗
Port 443
Why it's wrong here
Port 443 is for HTTPS, not SIP.
- ✓
Port 5060
Why this is correct
Port 5060 is the default port for SIP traffic.
- ✗
Port 1720
Why it's wrong here
Port 1720 is used for H.323, a different VoIP protocol.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1201 practice question is part of Courseiva's free CompTIA 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 220-1201 exam.