CLCOR Protocols And Endpoints Practice Question
A Cisco IP Phone 8841 is failing to register to Cisco Unified Communications Manager. You check the phone settings and see the TFTP server address is correct. Which protocol and port should you monitor on the gateway or firewall to verify the initial registration attempt?
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
✓
SIP UDP 5060
SIP registration uses UDP or TCP port 5060 for non-secure, or TLS port 5061 for secure 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.
- ✗
SCCP 2000
Why it's wrong here
SCCP uses port 2000, but modern 8841 phones use SIP.
- ✓
SIP UDP 5060
Why this is correct
SIP registration occurs over 5060 by default.
- ✗
TFTP 69
Why it's wrong here
TFTP is used for configuration file download, not registration signaling.
- ✗
HTTP 8080
Why it's wrong here
HTTP is used for provisioning, not registration.
About these practice questions
Courseiva writes every CLCOR question from scratch — 263 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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 August 2026 · checked against the official Cisco exam blueprint
This CLCOR 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 CLCOR exam.