CLCOR Cloud And Hybrid Services Practice Question
When using Webex Calling with the Local Gateway, which protocol is used for the SIP trunk between the CUBE and the Webex Calling cloud?
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
Webex Calling uses SIP (Session Initiation Protocol) to establish and manage the media and signaling paths between the gateway and the cloud.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
H.323
Why it's wrong here
H.323 is a legacy protocol not supported by the Webex Calling cloud.
- ✗
SCCP
Why it's wrong here
SCCP is a proprietary Cisco protocol for legacy endpoints.
- ✗
MGCP
Why it's wrong here
MGCP is used primarily for endpoint control in legacy systems.
- ✓
SIP
Why this is correct
SIP is the standard protocol for trunking in modern VoIP environments.
About these practice questions
One of 263 original CLCOR 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 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.