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Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

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CLCOR · topic practice

Protocols And Endpoints practice questions

This domain covers the protocols and endpoint behaviors that Cisco Collaboration core technologies rely on. It tests how endpoints register with Cisco Unified Communications Manager, which signaling and media protocols they use, and how to interpret protocol-level symptoms during troubleshooting. Expect questions on SIP, SCCP, and secure variants in on-premises deployments.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Editorial oversight:Johnson Ajibi· MSc IT Security, IEEE Senior Member

20 questionsDomain: Protocols And Endpoints

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What the exam tests

What to know about Protocols And Endpoints

You must identify the correct protocol for endpoint registration and media handling in CUCM on-premises deployments. The single most important thing is to know that Webex Room devices use SIP for signaling and that secure signaling requires TLS, while media encryption uses SRTP.

Cisco IP Phone registration with Cisco Unified Communications Manager using SCCP or SIP

SIP signaling for Webex Room devices registered on-premises to CUCM

RTCP packet analysis to diagnose jitter and audio quality issues

TLS and SRTP for secure signaling and media encryption on Webex Room devices

Watch out for

Common Protocols And Endpoints exam traps

▸Assuming Webex Room devices use SCCP when registered to CUCM; they use SIP for signaling.
▸Confusing RTCP high variance with packet loss; variance indicates jitter, not necessarily loss.
▸Believing secure signaling uses HTTPS or IPsec instead of TLS for SIP registration to CUCM.

Practice set

Protocols And Endpoints questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice

Read the full Protocols And Endpoints explanation →

A Webex Desk Pro is failing to provision via the Cisco Webex Control Hub. The device displays 'Provisioning Error'. Which configuration component is primarily responsible for holding the authentication credentials required for the device to pull its configuration?

Trap 1: TFTP Address

TFTP is for on-premises CUCM, not Webex cloud.

Trap 2: SIP Digest User

SIP digest is for CUCM registration, not cloud provisioning.

Trap 3: VLAN ID

VLAN ID assists with network connectivity, not authentication.

Study all Protocols And Endpoints common traps →

A
Activation Code
The activation code is the primary method for secure onboarding.
B
TFTP Address
Why it fails: TFTP is for on-premises CUCM, not Webex cloud.
C
SIP Digest User
Why it fails: SIP digest is for CUCM registration, not cloud provisioning.
D
VLAN ID
Why it fails: VLAN ID assists with network connectivity, not authentication.

Protocols And Endpoints practice questions

What to know about Protocols And Endpoints

Common Protocols And Endpoints exam traps

Protocols And Endpoints questions

A Webex Desk Pro is failing to provision via the Cisco Webex Control Hub. The device displays 'Provisioning Error'. Which configuration component is primarily responsible for holding the authentication credentials required for the device to pull its configuration?

An endpoint using the Opus codec is experiencing one-way audio. The SDP exchange indicates that the endpoint is offering a wideband range. Where in CUCM would you modify the Region settings to force the use of a specific codec for this endpoint?

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?

You are configuring a G.729 codec for a WAN link. To ensure that the voice quality remains acceptable while minimizing bandwidth, which feature must be enabled to prevent excessive packet overhead?

You need to verify that an endpoint is correctly sending RTCP reports to Cisco Unified Communications Manager. Which field in the RTCP packet header would you examine to track the jitter statistics?

A SIP endpoint is behind a NAT device. The endpoint registers successfully, but audio is one-way. What feature should be enabled on the SIP Profile to handle this issue?

You need to support Opus codec on a Cisco IP Phone 8865. Which configuration object must be updated to allow this codec?

Which field in the SIP INVITE SDP body specifies the media attributes such as codec type?

An IP phone is stuck in a boot loop. You suspect a corrupted firmware image. Which process would you initiate to force the phone to download a new image?

Which TWO protocols are used for managing the quality and monitoring of VoIP sessions?

Which THREE codecs are natively supported by the Cisco IP Phone 8800 series?

To ensure that G.729 is used for all inter-site calls but G.711 is used for intra-site calls, what specific CUCM construct must you define?

Which TWO tasks must be performed when moving a phone from one CUCM cluster to another?

Which THREE methods are used by Cisco IP phones to obtain their configuration files?

Which THREE items are included in a standard SIP REGISTER request?

Which TWO parameters are defined within a SIP Profile in CUCM?

Which TWO factors significantly impact the choice of audio codec during a call setup in CUCM?

A Cisco TelePresence endpoint registered to CUCM is experiencing one-way audio. The endpoint is behind a NAT device, and the SIP signaling is working correctly. Which configuration change on CUCM is most likely to resolve the one-way audio issue?

A Cisco Webex Room Kit is registered to CUCM using SIP. During a call to an external H.323 endpoint via a Cisco Expressway, the call connects but no video is seen. Which two actions should you take to troubleshoot the issue? (Choose two.)

An administrator is configuring a SIP trunk between CUCM and a Cisco Unified Border Element (CUBE) to support early offer for outbound calls. Which two SIP message headers are essential for the early offer mechanism to function correctly? (Choose two.)

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