Be able to trace Webex Calling and hybrid call flows across CUBE, Local Gateway, CUCM, and Webex App. The most important thing is correctly identifying whether a failure is signaling, routing, licensing, or service-specific before choosing the fix.
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Domain overview
This domain covers Cisco cloud and hybrid collaboration: Webex Calling, Webex App, Hybrid Call Service Connect, Hybrid Video Mesh, and CUBE/Local Gateway integration with on-premises CUCM and PSTN providers. Questions present real deployment symptoms, such as failed PSTN INVITEs or node removal impacts, and require you to identify the correct service behavior, configuration dependency, or troubleshooting cause.
Exam objectives
Webex Calling Local Gateway and CUBE SIP signaling, including 403 Forbidden causes
Hybrid Call Service Connect call routing between Webex App and on-premises CUCM
Hybrid Video Mesh cluster node removal impact on active meetings
Webex Calling app versus Webex app calling capability differences
Assuming a 403 Forbidden from CUBE is always a PSTN provider problem instead of a local dial peer or translation-rule mismatch.
Believing removing a Video Mesh node is transparent; active meetings hosted on that node are affected.
Confusing Webex Calling app and Webex app capabilities; the calling license and deployment mode determine what is available.
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You are configuring a Webex Calling environment for a customer that requires integration with an existing on-premises PBX using a Cisco Unified Border Element (CUBE). Which gateway type should you register to Webex Control Hub to enable this connectivity?
2You are deploying Webex Calling with Local Gateway. Which component must be configured to allow PSTN connectivity for users who have migrated from on-premises CUCM to the cloud?
3You are deploying Webex Hybrid Data Security (HDS). After deploying the virtual machines for the HDS nodes, you find they are not appearing in Control Hub. What is the first step you should take to troubleshoot the registration?
4You need to ensure that the Webex Hybrid Calendar service can access an Exchange 2019 environment. Which authentication method is recommended by Cisco for this deployment?
5Where in Webex Control Hub do you go to view the health status of all deployed Hybrid Services connectors?
6When configuring Hybrid Call Service for Cisco Unified Communications Manager, which specific requirement must be met for the Expressway-C and Expressway-E pair?
7When managing Webex Calling using the 'Webex Calling' app versus the 'Webex' app, what determines the calling capabilities?
8What is the primary function of the Cisco Webex Edge Audio service?
9You are configuring Webex Hybrid Message Service. What is the primary purpose of this service?
10You are deploying a Webex Room device in a hybrid environment. What is the benefit of registering it to Webex instead of on-premises CUCM?
11A company is implementing Webex Edge Connect. They require a dedicated circuit. Who must they coordinate with to set up the physical connection?
12Which component is required to synchronize users from an on-premises Active Directory to the Webex Cloud?
13An administrator is troubleshooting a failed Hybrid Calendar setup. The 'Connector' shows as 'Down' in Control Hub. What is the most likely reason?
14When using Webex Calling with the Local Gateway, which protocol is used for the SIP trunk between the CUBE and the Webex Calling cloud?
15Which dashboard in Control Hub provides insights into the quality and usage of hybrid services?
16Which of the following is a key advantage of utilizing Cloud Connected PSTN (CCP)?
17You notice high latency on calls placed through a Local Gateway. Which metric should you inspect in the Webex Control Hub to confirm the issue is with the network path?
18Which option allows a customer to keep their existing PSTN numbers while moving to Webex Calling?
19What is the first step to enable Webex Hybrid Services in a new organization?
20When deploying Webex Hybrid Services, what is the purpose of the Expressway-C cluster?
21You need to ensure that the Webex App can perform 'Click-to-Call' from a browser. What must be installed on the user's machine?
22Which configuration in Control Hub allows you to define the emergency address for a user in a Webex Calling environment?
23What is the purpose of the 'Webex Service' account in Active Directory when using Directory Connector?
24Which service allows Webex users to see the presence status of an on-premises Jabber user?
25What happens to a user's Webex account if they are removed from the synchronized Active Directory group?
26What is the primary benefit of the 'Webex Edge' strategy?
27Which TWO of the following are required components of a Cisco Local Gateway deployment? (Choose two)
28Which THREE of the following items are verified during the Webex Hybrid Service connector installation? (Choose three)
29Which TWO of the following are valid deployment models for the Webex Calling PSTN connectivity? (Choose two)
30You need to migrate users from an on-premises Cisco Unified Communications Manager (CUCM) to Webex Calling. Which tool allows for the bulk onboarding of users while maintaining existing directory synchronization?
31You are configuring a local gateway for Webex Calling. Which mechanism ensures that the Webex Cloud can communicate with your on-premises edge device without requiring inbound firewall ports?
32A company uses Webex Hybrid Calendar Service. Users report that the 'Join' button is missing from their Webex Room devices for scheduled meetings. What is the most likely cause?
33Which deployment model should be chosen for Cloud Connected PSTN (CCP) if the organization wants to leverage their existing carrier contracts?
34You are configuring Webex Hybrid Data Security (HDS). What is the purpose of the 'Key Management Service' (KMS) in this architecture?
35When troubleshooting a Hybrid Media Service node, which log file is most critical for determining if the media is being routed correctly to the cloud?
36Where in Webex Control Hub do you verify the health status of Hybrid Service connectors?
37Which protocol is required for the Webex Hybrid Directory Connector to communicate with on-premises Active Directory?
38What is the impact of removing a node from a Hybrid Video Mesh cluster that is currently hosting active meetings?
39A user is unable to receive incoming PSTN calls via a Webex Calling Local Gateway. You observe that the INVITE from the provider reaches the CUBE, but the CUBE sends a 403 Forbidden. What is the most likely cause?
40Which license type is required to manage Webex Calling services in Control Hub?
41In a Webex hybrid environment, what is the primary role of the Expressway-C?
42Which TWO tasks must be performed when setting up Webex Hybrid Calendar service with Microsoft Exchange?
43When troubleshooting Webex Calling, which THREE factors are critical for maintaining call quality over a hybrid network?
44Which THREE items are required to successfully register a room device to Webex?
45Which TWO of the following describe the purpose of the Webex Edge for Devices service?
46A company is deploying Webex Hybrid Directory Service to synchronize on-premises Active Directory users to Webex Control Hub. The administrator has installed the connector on a Windows Server 2019 machine and configured the required DNS SRV record. During the connector setup, the administrator is prompted to provide credentials for a service account. Which of the following must be true about this service account?
47A collaboration engineer is configuring Webex Hybrid Call Service Connect to integrate an on-premises Cisco Unified Communications Manager (CUCM) cluster with Webex. The engineer has deployed Expressway-C and Expressway-E in the enterprise and has enabled the Hybrid Call Service Connector on the Expressway-C. After configuration, users in Webex Teams cannot place calls to on-premises CUCM-registered endpoints. Which of the following is the most likely cause?
48A collaboration engineer is configuring a Webex Calling PSTN option where the enterprise wants to keep its existing Cisco Unified Border Element (CUBE) and SIP trunk contract with the incumbent carrier, while still using Webex Calling for call control and user features. Which Webex Calling PSTN connection type should the engineer select in Webex Control Hub?
49A collaboration engineer is designing a Webex Calling deployment for a company that requires all PSTN calls to egress through their existing on-premises Cisco Unified Border Element (CUBE) with a PRI circuit. The company wants to keep the PSTN gateway on-premises and use Webex Calling for internal and external calling. Which deployment option should the engineer choose?
50An administrator is deploying Webex Hybrid Calendar Service with an on-premises Microsoft Exchange 2019 environment. Users report that their Webex meetings are not being automatically added to their Outlook calendars. The administrator has already verified that the Expressway-C and Expressway-E connectors are registered and healthy in Control Hub. Which additional component must be installed and configured to enable the calendar integration?
51A company has deployed Webex Hybrid Message Service to integrate its on-premises Cisco Unified Communications Manager IM and Presence Service with Webex. Users complain that their presence status is not updating in Webex when they change it in the on-premises Jabber client. The administrator confirms that the Expressway-C and Expressway-E are registered and that the Hybrid Message Service connector is running. Which component should the administrator verify next to ensure presence federation is working?
52A collaboration administrator needs to provide users with the ability to make and receive PSTN calls through Webex Calling without deploying any on-premises gateways or maintaining a separate carrier contract. Which Webex Calling PSTN option should the administrator choose?
53A collaboration engineer is deploying Webex Hybrid Calling with Cisco Unified Communications Manager (CUCM) as the call control. The engineer wants to provide PSTN access to Webex Calling users by leveraging the existing on-premises Cisco IOS Voice Gateway. Which solution should be implemented?
54An administrator needs to verify that the Webex Hybrid Calendar Service connector is running and healthy. Where in Webex Control Hub should the administrator check the status of the connector?
55A company has deployed Webex Hybrid Call Service Connect to allow Webex App users to make calls using their on-premises Cisco Unified Communications Manager (CUCM) infrastructure. Users report that they can see presence but cannot make calls. Which component should be checked first to ensure that call signaling is working?
56A company has deployed Cisco Webex Hybrid Calendar Service with Exchange 2019 on-premises. Users report that scheduled Webex meetings are not appearing on their calendars, and the connector shows a 'Connected' status but no calendar events are being processed. Which action should be taken to resolve this issue?
57A collaboration engineer is deploying Cisco Webex Hybrid Message Service with Cisco Unified Communications Manager (CUCM) and Expressway-C. The requirement is to enable secure instant messaging and presence between on-premises CUCM users and Webex. Which two components are required for this deployment? (Choose two.)
58A collaboration administrator needs to verify that the Webex Hybrid Services connectors are healthy and operational. Where in Cisco Webex Control Hub can the administrator check the status of the connectors?
59An administrator is configuring Cisco Webex Hybrid Directory Service to synchronize users from an on-premises Active Directory to Webex Control Hub. The synchronization is not working, and the connector status in Control Hub shows 'Not Connected'. What is the most likely cause?
60A company is deploying Webex Hybrid Video Mesh to optimize media traversal for internal meetings. The administrator has deployed two Video Mesh nodes in a cluster. During testing, users on the internal network report poor video quality when joining meetings hosted by the Video Mesh nodes, while external users have good quality. What is the most likely cause?
61A collaboration engineer is designing a Webex Hybrid Services deployment for an organization that requires all media to be processed on-premises while still using Webex Control Hub for user management and analytics. The organization has an existing Expressway-C and Expressway-E pair. Which Webex Hybrid service must be deployed to meet the requirement that all call signaling and media remain on-premises?
62A collaboration administrator is troubleshooting a Webex Hybrid Services deployment. The connector for Hybrid Calendar Service shows as 'Down' in Control Hub. The administrator has verified that the connector server has network connectivity to the internet. Which additional check should be performed first to resolve the connector status?
63A company is deploying Webex Hybrid Data Security (HDS) to enhance privacy for Webex messages and files. Which two components must be deployed on-premises to support this service? (Choose two.)
Be able to trace Webex Calling and hybrid call flows across CUBE, Local Gateway, CUCM, and Webex App. The most important thing is correctly identifying whether a failure is signaling, routing, licensing, or service-specific before choosing the fix.
The Courseiva CLCOR question bank contains 63 questions in the Cloud And Hybrid Services domain. Click any question to see the full explanation and answer breakdown.
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