How many VLAN and Inter-VLAN Routing Scenarios questions are on this page?

This page has 9 VLAN and Inter-VLAN Routing Scenarios scenario questions for the CLCOR exam, each with detailed explanations and wrong-answer analysis.

How should I approach CLCOR scenario questions?

Read the full scenario before looking at the answer options. Identify the constraint or requirement in the scenario, then eliminate options that are generally true but wrong for this specific case. Scenario questions reward careful reading over pattern matching.

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Scenario-based practice

VLAN and Inter-VLAN Routing Scenarios

Practise CLCOR VLAN and trunking questions covering access ports, trunk ports, allowed VLAN lists, native VLAN, inter-VLAN routing, and command-output troubleshooting.

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Scenario guide

How to approach vlan and inter-vlan routing scenarios

VLAN misconfiguration is one of the top sources of connectivity failures in real networks and one of the most tested areas on the CCNA. These questions cover VLAN access ports, 802.1Q trunks, native VLANs, and router-on-a-stick or layer-3 switch inter-VLAN routing.

Quick answer

Routing questions usually test route selection (administrative distance, metric), how static routes are configured and when they are preferred over dynamic routing.

Administrative distance comparing routing sources.

Static route configuration: next-hop vs exit interface.

Default route propagation and the gateway of last resort.

Recursive routing table lookups.

Practice scenarios

Question 1easymultiple choice

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When deploying Cisco IP phones, what is the best practice for VLAN configuration?

A
Use the default VLAN 1 for all voice and data.
Why wrong: Mixing voice and data in VLAN 1 is a security and performance risk.
B
Use a dedicated Voice VLAN.
Separating voice from data is a fundamental design best practice.
C
Use a separate physical switch for phones.
Why wrong: This is unnecessary and increases operational costs.
D
Do not use VLANs; use static routing.
Why wrong: VLANs are essential for modern Layer 2 switching environments.

Full breakdown with real-world context →

Question 2mediummultiple choice

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What is the primary function of the CUBE in a SIP trunking scenario?

A
Call routing for internal phones
Why wrong: That is the primary role of CUCM.
B
Demarcation and SIP normalization
This is the core function of the CUBE.
C
Voice messaging storage
Why wrong: That is the function of Unity Connection.
D
DHCP Server functionality
Why wrong: CUBE is not typically used as a DHCP server.

Full breakdown with real-world context →

Question 3mediummultiple choice

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You are configuring a SIP trunk between CUCM and a CUBE. Which setting is critical to ensure that the SIP signaling is encrypted?

A
SIP Trunk Security Profile
This profile defines the security settings for the SIP trunk.
B
Enterprise Parameters
Why wrong: Enterprise parameters define global system settings.
C
Device Pool
Why wrong: The Device Pool does not contain security settings for trunks.
D
SIP Profile
Why wrong: The SIP Profile handles signaling timers and attributes, not security.

Full breakdown with real-world context →

Question 4hardmulti select

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Which THREE of the following tasks are required to set up a basic SIP trunk in CUCM?

A
Create a Route Filter
Why wrong: Not strictly required for a basic trunk.
B
Create a SIP Trunk Security Profile
Needed for security/authentication settings.
C
Create a SIP Profile
Needed for signal attribute settings.
D
Create a Translation Pattern
Why wrong: Not strictly required for a basic trunk.
E
Create a SIP Trunk
The trunk object itself is required.

Full breakdown with real-world context →

Question 5hardmultiple choice

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You are migrating to a new SIP provider. You have a requirement to use 'Early Offer' for all calls on this trunk. Where is this configured?

A
SIP Trunk Security Profile
Why wrong: This handles security/TLS.
B
Device Pool
Why wrong: Device pools don't control SIP offer types.
C
Route List
Why wrong: Route lists are for path routing.
D
SIP Profile
SIP profiles control the signaling offer/answer behavior.

Full breakdown with real-world context →

Question 6mediummultiple choice

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When using Webex Calling with the Local Gateway, which protocol is used for the SIP trunk between the CUBE and the Webex Calling cloud?

A
H.323
Why wrong: H.323 is a legacy protocol not supported by the Webex Calling cloud.
B
SCCP
Why wrong: SCCP is a proprietary Cisco protocol for legacy endpoints.
C
MGCP
Why wrong: MGCP is used primarily for endpoint control in legacy systems.
D
SIP
SIP is the standard protocol for trunking in modern VoIP environments.

Full breakdown with real-world context →

Question 7easymultiple choice

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An administrator is configuring a new SIP trunk between CUCM and a CUBE. To ensure that CUCM correctly handles mid-call signaling updates such as hold/resume, which parameter in the SIP Profile should be verified?

A
Retry Count
Why wrong: This affects SIP transaction timing, not feature support.
B
SIP Rel1XX Options
Enabling this ensures CUCM handles reliable provisional responses.
C
Disable Early Media on 180
Why wrong: This affects audio path establishment, not hold/resume signaling.
D
SIP Timer T1
Why wrong: This relates to retransmission timers, not signaling features.

Full breakdown with real-world context →

Question 8hardmultiple choice

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You are implementing a SIP trunk to the PSTN. The carrier requires the 'Diversion' header for call forwarding scenarios. Where in CUCM do you configure this?

A
SIP Trunk Security Profile
Why wrong: This is for security settings.
B
SIP Profile
SIP Profiles manage headers and signaling behavior for SIP trunks.
C
Route Pattern
Why wrong: Route patterns do not control SIP headers.
D
Device Pool
Why wrong: Device pools do not manage SIP headers.

Full breakdown with real-world context →

Question 9mediummultiple choice

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An administrator needs to ensure that internal calls between two sites are routed over an MTP-required SIP trunk, but the calls are failing due to codec mismatch. Which CUCM service parameter setting should be verified to allow the MTP to be inserted?

A
Increase the 'Maximum Number of MTP Resources' in the Service Parameters.
Why wrong: This increases capacity but does not solve a failure caused by a lack of MTP insertion.
B
Change the SIP Trunk Security Profile to 'Non-Secure' to bypass encryption negotiation.
Why wrong: Security profiles do not affect codec negotiation or MTP allocation.
C
Check the MTP Required checkbox on the SIP trunk configuration and ensure the MRGL includes an MTP resource.
Enabling MTP Required forces the CUCM to allocate an MTP resource for the call, resolving codec negotiation issues.
D
Modify the Region settings to force G.711 codec between the two sites.
Why wrong: Changing the region does not force an MTP to be inserted if the trunk is not configured to require one.

Full breakdown with real-world context →

These CLCOR practice questions are part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style CLCOR questions with detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics.

VLAN and Inter-VLAN Routing Scenarios

How to approach vlan and inter-vlan routing scenarios

Quick answer

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Practice scenarios

When deploying Cisco IP phones, what is the best practice for VLAN configuration?

What is the primary function of the CUBE in a SIP trunking scenario?

You are configuring a SIP trunk between CUCM and a CUBE. Which setting is critical to ensure that the SIP signaling is encrypted?

Which THREE of the following tasks are required to set up a basic SIP trunk in CUCM?

You are migrating to a new SIP provider. You have a requirement to use 'Early Offer' for all calls on this trunk. Where is this configured?

When using Webex Calling with the Local Gateway, which protocol is used for the SIP trunk between the CUBE and the Webex Calling cloud?

An administrator is configuring a new SIP trunk between CUCM and a CUBE. To ensure that CUCM correctly handles mid-call signaling updates such as hold/resume, which parameter in the SIP Profile should be verified?

You are implementing a SIP trunk to the PSTN. The carrier requires the 'Diversion' header for call forwarding scenarios. Where in CUCM do you configure this?

An administrator needs to ensure that internal calls between two sites are routed over an MTP-required SIP trunk, but the calls are failing due to codec mismatch. Which CUCM service parameter setting should be verified to allow the MTP to be inserted?