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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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Protocols And Endpoints practice questions

Practise Cisco Implementing Cisco Collaboration Core Technologies (CLCOR, 350-801, v2.0 blueprint, CCNP Collaboration) (CLCOR) Protocols And Endpoints practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

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.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Protocols And Endpoints

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What the exam tests

What to know about Protocols And Endpoints

IPv6 questions usually test address types (link-local, global unicast, ULA), autoconfiguration (SLAAC), Neighbor Discovery Protocol and the differences from IPv4.

IPv6 address types and their scopes (link-local, global unicast, multicast, ULA).

SLAAC vs DHCPv6 vs stateful assignment.

Neighbor Discovery Protocol replacing ARP.

IPv6 routing differences and dual-stack coexistence.

Watch out for

Common Protocols And Endpoints exam traps

▸Link-local addresses are not routable beyond the local link.
▸SLAAC uses EUI-64 or random interface IDs — not a DHCP server.
▸NDP uses ICMPv6, not ARP.
▸An IPv6 prefix is /64 for most host subnets, not /24.

Practice set

Protocols And Endpoints questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice

Read the full Protocols And Endpoints explanation →

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?

Trap 1: DSCP marking

DSCP is for QoS prioritization, not bandwidth reduction.

Trap 2: Jitter buffer sizing

Jitter buffer handles delay variation, not bandwidth overhead.

Trap 3: RTCP feedback

RTCP is for quality reporting, not bandwidth control.

Study all Protocols And Endpoints common traps →

A
DSCP marking
Why wrong: DSCP is for QoS prioritization, not bandwidth reduction.
B
Jitter buffer sizing
Why wrong: Jitter buffer handles delay variation, not bandwidth overhead.
C
Payload size adjustment
Reducing payload size or adjusting packetization interval impacts bandwidth.
D
RTCP feedback
Why wrong: RTCP is for quality reporting, not bandwidth control.

Protocols And Endpoints practice questions

What to know about Protocols And Endpoints

Common Protocols And Endpoints exam traps

Protocols And Endpoints questions

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?

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?

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

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 sends a SIP REGISTER request. CUCM returns a 401 Unauthorized response. What is the next logical step in the SIP signaling flow for the endpoint?

When configuring an IP phone for automatic provisioning, which DHCP option is most commonly used to provide the TFTP server address to the phone?

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 troubleshooting a scenario where G.711 is being used instead of the expected Opus codec between two endpoints in the same region. What is the most likely cause in the CUCM configuration?

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?

Which protocol is primarily used for the transmission of real-time voice and video data between two endpoints?

You are monitoring RTP traffic using a protocol analyzer. You observe that the Payload Type field in the RTP header is set to 0. Which codec is currently in use?

You are troubleshooting intermittent audio quality. You notice that RTCP packets are arriving with high variance. What does this indicate?

Which component in the Cisco Collaboration architecture provides the initial configuration files (XML) to an IP phone upon registration?

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

When a SIP phone initiates a call, which message does the CUCM send to acknowledge the initial INVITE?

You have a requirement to use secure signaling for SIP endpoints. Which protocol and port combination must be used in the SIP Security Profile?

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 protocol provides the signaling for Webex Room devices when they are registered to CUCM (on-premises)?

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