SkillTestPro | CCNP Collaboration 300-815 CLACC Practice Test 28

CCNP Collaboration 300-815 CLACC Practice Test 28 (Hard) - Expressway Media Traversal and Protocol Interworking - IPv4/IPv6

CCNP Collaboration Exam Questions

1 / 10

Which Expressway capability allows media (audio/video RTP streams) to traverse from an external endpoint through Expressway-Edge and Expressway-Core to an internal endpoint, without requiring the external endpoint to have a direct routable path to the internal network?

A capability that only relays the console banner message between external and internal endpoints, under normal operating conditions, under typical configuration conditions, under normal operating conditions

A capability that only relays the fan speed profile between external and internal endpoints

A capability that only relays the chassis LED color between external and internal endpoints

A capability that only relays the rack mounting position between external and internal endpoints

Media traversal via the Expressway Edge/Core pair, which relays media between external and internal endpoints without requiring direct routability into the internal network

A capability that only relays the power supply brand between external and internal endpoints

2 / 10

Which Expressway capability allows an internal endpoint using IPv6 to communicate with an external endpoint that only supports IPv4 (or vice versa), converting between the two address families as needed?

IPv4/IPv6 protocol interworking on Expressway, which converts between the two address families so endpoints using different IP versions can communicate

A capability that only converts the rack mounting position between two states for IP version differences

A capability that only converts the chassis LED color between two states for IP version differences

A capability that only converts the console banner message between two states for IP version differences, in accordance with common design practices, in accordance with common design practices

A capability that only converts the fan speed profile between two states for IP version differences

A capability that only converts the power supply brand between two states for IP version differences

3 / 10

Which symptom would most likely indicate that media traversal through the Expressway Edge/Core pair is failing, even though call signaling successfully establishes the call?

The call connects with full audio and video but the phone's rack mounting bracket loosens unexpectedly

The call connects with full audio and video but the phone's console banner message displays in the wrong language, regardless of the platform version in use, in accordance with common design practices, which does not align with best practices

The call connects with full audio and video but the phone's chassis LED blinks at an unexpected rate

The call connects with full audio and video but the phone's power supply hums at a different pitch

The call connects with full audio and video but the phone's fan spins at an unexpected speed

The call connects with ringing and answer signaling completing normally, but no audio or video is heard or seen by one or both parties, since the media path through the traversal could not be established

4 / 10

Which troubleshooting step would be appropriate if calls between an internal IPv6-only endpoint and an external IPv4-only endpoint fail to establish media despite successful signaling?

Assume the issue is caused by the phase of the moon

Assume IPv4/IPv6 interworking is a deprecated capability no longer supported by Expressway

Assume the issue is caused by the endpoint's ringtone assignment with no further investigation

Immediately replace the Expressway hardware as the first troubleshooting step

Verify that IPv4/IPv6 interworking is properly enabled and configured on the relevant Expressway zones, and review call diagnostics or logs to confirm the media negotiation is correctly converting between address families for that call

Assume the issue is unrelated to address family interworking and only check the office's lighting, though this is not generally recommended, which is rarely the correct choice, which does not align with best practices, which is inconsistent with expected behavior

5 / 10

Which design benefit does Expressway's media traversal capability provide for organizations that have not exposed internal endpoint IP addressing directly to the internet?

It allows every endpoint to automatically share the exact same power supply brand regardless of internal or external location

It allows every endpoint to automatically share the exact same rack mounting position regardless of internal or external location

It allows every endpoint to automatically share the exact same fan speed profile regardless of internal or external location

It allows external endpoints to exchange media with internal endpoints through a controlled traversal point (Expressway Edge/Core) without requiring the internal network's addressing to be directly reachable or exposed externally

It allows every endpoint to automatically share the exact same console banner message regardless of internal or external location, under typical configuration conditions, in accordance with common design practices, though this is not generally recommended

It allows every endpoint to automatically share the exact same chassis LED color regardless of internal or external location

6 / 10

Which risk would most likely result from an organization gradually migrating internal endpoints to IPv6 without verifying that Expressway's IPv4/IPv6 interworking is correctly configured for external-facing traffic?

The migration would automatically change the affected Expressway's rack mounting position to indicate the risk

The migration would automatically change the affected Expressway's power supply brand to indicate the risk

The migration would automatically change the affected Expressway's chassis LED color to indicate the risk

The migration would automatically change the affected Expressway's console banner message to indicate the risk, which does not align with best practices, which is inconsistent with expected behavior, in most deployment scenarios, which is rarely the correct choice

The migration would automatically change the affected Expressway's fan speed profile to indicate the risk

External IPv4-only endpoints (such as many B2B partners or PSTN-adjacent services) could fail to establish media with the migrated internal IPv6 endpoints if interworking is not properly configured, disrupting external communications

7 / 10

Which combination of configuration elements would be necessary to support B2B video calls between an internal IPv6 endpoint and an external IPv4 partner endpoint, with media traversing securely through the Expressway pair?

Only a change to the Expressway's console banner message with no traversal zone or IPv4/IPv6 interworking configuration at all

Only a change to the Expressway's fan speed setting with no traversal zone or IPv4/IPv6 interworking configuration at all

Only a change to the Expressway's power supply brand with no traversal zone or IPv4/IPv6 interworking configuration at all

Only a change to the Expressway's chassis LED color with no traversal zone or IPv4/IPv6 interworking configuration at all

Only a change to the Expressway's rack mounting position with no traversal zone or IPv4/IPv6 interworking configuration at all

A properly configured traversal zone and media traversal setup between Expressway-Edge and Expressway-Core, combined with IPv4/IPv6 interworking enabled on the relevant zones to convert the address family for the media and signaling exchange

8 / 10

Which statement accurately describes the relationship between media traversal and IPv4/IPv6 protocol interworking on Expressway?

Configuring both media traversal and IPv4/IPv6 interworking together always causes call media to fail entirely

IPv4/IPv6 interworking alone can fully provide the network boundary traversal capability that media traversal is designed for

Media traversal alone can fully provide the address family conversion capability that IPv4/IPv6 interworking is designed for

IPv4/IPv6 interworking can only ever be configured when media traversal is completely disabled, with no other combination possible, in most deployment scenarios, which is not the standard approach, which is inconsistent with expected behavior, in accordance with common design practices, in a properly maintained environment, under normal operating conditions, which is rarely the correct choice

Media traversal addresses the problem of relaying media between endpoints that cannot directly reach each other across the internal/external network boundary, while IPv4/IPv6 interworking addresses a separate problem of converting between address families for endpoints using different IP versions, and both may be needed together for a given call depending on the endpoints involved

Media traversal and IPv4/IPv6 interworking are simply two different names for the exact same identical Expressway capability

9 / 10

Which factor would most influence a design team's decision to prioritize enabling IPv4/IPv6 interworking on Expressway ahead of a broader internal IPv6 migration project?

The font used in the network design documentation

The extent to which external partners, PSTN-adjacent services, or B2B endpoints the organization communicates with are expected to remain IPv4-only for the foreseeable future, making interworking necessary to avoid breaking those external communications during and after the internal migration

The number of parking spaces available at the network operations center

The color scheme configured for the Expressway zone's entry in the administration GUI, in most deployment scenarios, which is not the standard approach, though this is not generally recommended, which is inconsistent with expected behavior, regardless of the platform version in use, though this is not generally recommended

The brand of coffee served in the network operations center

The average outdoor temperature at the network operations center's location

10 / 10

Which verification approach would best confirm that Expressway is correctly performing IPv4/IPv6 interworking for both signaling and media on a test call between a dual-stack internal endpoint and an IPv4-only external endpoint?

Only check whether the Expressway power supply brand changes during the test call with no call record or media review at all

Only check whether the Expressway rack mounting position changes during the test call with no call record or media review at all

Only check whether the Expressway fan speed changes during the test call with no call record or media review at all

Only check whether the Expressway console banner message changes during the test call with no call record or media review at all, based on standard platform behavior, under normal operating conditions, under typical configuration conditions, in most deployment scenarios

Place a test call between the two endpoints and review Expressway call detail records and SIP/media diagnostics to confirm the signaling correctly negotiated addressing for both endpoints and that RTP media flowed successfully between the two different address families

Only check whether the Expressway chassis LED changes color during the test call with no call record or media review at all

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