CLCOR Practice Exam 2 — 20 Questions

Question 1

Which command is used on the Expressway CLI to verify the status of the Hybrid Service connector process?

Accepted Answer

xstatus management services. The 'xstatus' command is the primary tool for verifying the status of processes and services running on the Expressway platform.

Answer

netstat -anp

Answer

utils webex status

Answer

show services

Question 2

Which protocol does the Webex Hybrid Message service use to communicate with the on-premises IM&P server?

Accepted Answer

XMPP. The Hybrid Message Service uses the Extensible Messaging and Presence Protocol (XMPP) to communicate between the IM&P server and the Webex cloud.

Answer

SIP

Answer

SCCP

Answer

HTTPS

Question 3

Which THREE of the following items are verified during the Webex Hybrid Service connector installation? (Choose three)

Accepted Answer

Active Directory service account privileges.. The installation process validates that the Expressway-C can communicate with the cloud, that the certificates are trusted, and that the service account has the necessary permissions.

Answer

The local PBX manufacturer.

Answer

User's home network speed.

Question 4

What is the first step to enable Webex Hybrid Services in a new organization?

Accepted Answer

Register the organization in Control Hub.. Enabling the Hybrid Services feature in the Control Hub settings is the foundational step before registering any connectors.

Answer

Purchase a PSTN plan.

Answer

Install the Expressway-C software.

Answer

Assign licenses to all users.

Question 5

Which TWO of the following are required components of a Cisco Local Gateway deployment? (Choose two)

Accepted Answer

A Cisco Unified Border Element (CUBE).. A Local Gateway requires a CUBE (Cisco Unified Border Element) and a SIP trunk to the Webex Calling cloud.

Answer

An on-premises Active Directory server.

Answer

A dedicated fiber-optic internet connection.

Answer

A cloud-based PSTN provider.

Question 6

You are configuring DNS SRV records to support Jabber service discovery. Which domain format is correct for the _collab-edge._tls record?

Accepted Answer

_collab-edge._tls.example.com. The _collab-edge._tls record is used by Cisco Expressway-E for MRA discovery, and it must point to the FQDN of the Expressway-E cluster.

Answer

_tls._collab-edge.example.com

Answer

collab-edge.example.com._tls

Answer

_collab-edge._tcp.example.com

Question 7

Which design principle must be followed when implementing a centralized call processing deployment with remote branch offices connected via a WAN?

Accepted Answer

Enable SRST on the local branch gateway to handle call processing during a WAN outage.. When the WAN link fails, Survivable Remote Site Telephony (SRST) or Cisco Unified SRST is required to keep the phones registered and functional.

Answer

Deploy a dedicated CUCM node in every branch office.

Answer

Configure H.323 gateways at each site to communicate directly with all remote phones.

Answer

Use RSVP to guarantee bandwidth across the WAN for signaling.

Question 8

You have a CUCM cluster with high utilization. Which parameter, when adjusted, helps mitigate the load on the TFTP service during a large-scale phone deployment?

Accepted Answer

TFTP File Load Factor. Setting the 'Enable Caching of Signed Files' and 'TFTP File Load Factor' helps optimize the TFTP server's ability to serve requests without overloading.

Answer

Keepalive Interval

Answer

Max Phone Registrations

Answer

Registration Timeout

Question 9

Which component is required to synchronize users from an on-premises Active Directory to the Webex Cloud?

Accepted Answer

Cisco Directory Connector. The Cisco Directory Connector is the standard tool for provisioning and synchronizing user identities from LDAP/AD to Webex.

Answer

Webex Calling Admin Console

Answer

Expressway-C

Answer

Cisco Webex HDS

Question 10

When a user is off-network, how do they connect to the corporate network resources if you have deployed Hybrid services?

Accepted Answer

The user must use a VPN client.. The Webex App typically connects directly to the cloud; if internal resources are needed, a VPN or other secure access method is required, as the Webex App does not act as a site-to-site VPN.

Answer

The Expressway-E provides direct access.

Answer

The Webex App automatically tunnels all traffic to the corporate network.

Answer

The Hybrid Services connector bridges the traffic.

Question 11

Which THREE of the following troubleshooting steps should be performed if a Webex Hybrid connector is showing 'Down' in Control Hub? (Choose three)

Accepted Answer

Restart the Management Service on the Expressway-C.. When a connector fails, the administrator should verify network connectivity, check the service status on the Expressway, and examine the local logs for errors.

Answer

Re-provision the Active Directory domain controller.

Answer

Upgrade the CUCM cluster software.

Question 12

An administrator is troubleshooting a failed Hybrid Calendar setup. The 'Connector' shows as 'Down' in Control Hub. What is the most likely reason?

Accepted Answer

The Expressway-C host cannot reach the cloud over port 443.. If the service connector is down, it usually indicates a loss of connectivity from the Expressway-C host to the cloud, or an issue with the management service process on the appliance.

Answer

The calendar integration license is invalid.

Answer

The user's password expired.

Answer

The user is not in the correct group in Active Directory.

Question 13

You need to ensure that the Webex App can perform 'Click-to-Call' from a browser. What must be installed on the user's machine?

Accepted Answer

Webex browser extension.. The 'Webex Extension' for browsers enables the integration of click-to-call functionality from web pages directly into the Webex App.

Answer

The Hybrid Calendar connector.

Answer

A local PSTN gateway.

Answer

Cisco Jabber for Windows.

Question 14

In a Cisco collaboration design, you are tasked with identifying the DHCP Option required for Cisco IP Phones to discover the TFTP server address automatically. Which option is standard for this purpose?

Accepted Answer

Option 150. DHCP Option 150 is the standard Cisco-specific option used to provide the IP addresses of the TFTP servers to IP endpoints.

Answer

Option 66

Answer

Option 128

Answer

Option 43

Question 15

When deploying Webex Hybrid Services, what is the purpose of the Expressway-C cluster?

Accepted Answer

To host the connectors that communicate with the Webex cloud.. The Expressway-C cluster acts as the secure gateway and connector host that bridges on-premises services to the Webex cloud.

Answer

To act as a firewall for all enterprise traffic.

Answer

To store all user messages on-premises.

Answer

To manage public DNS records for the organization.

Question 16

Which TWO of the following items can be monitored in the Webex Control Hub under the 'Hybrid' tab? (Choose two)

Accepted Answer

Connector status (up/down).. The Hybrid tab provides real-time health monitoring and connectivity status for all deployed service connectors.

Answer

Physical desk phone inventory.

Answer

PSTN usage minutes.

Answer

User password history.

Question 17

Which protocol is required for the Webex Hybrid Directory Connector to communicate with on-premises Active Directory?

Accepted Answer

LDAP. The Directory Connector uses LDAP to query and sync users from the local AD to the Webex Cloud.

Answer

XML

Answer

SIP

Answer

SNMP

Question 18

When troubleshooting Webex Calling, which THREE factors are critical for maintaining call quality over a hybrid network?

Accepted Answer

Quality of Service (QoS) tagging. QoS, bandwidth, and latency are the three pillars of maintaining high-quality voice in hybrid environments.

Answer

Local database replication speed

Answer

Hardware firewall bypass

Question 19

When designing an NTP deployment for a Cisco Collaboration environment, what is the best practice for time synchronization across CUCM nodes?

Accepted Answer

Point all CUCM nodes to the same external NTP stratum 1 or 2 servers.. CUCM nodes must point to the same reliable external Stratum 1 or 2 NTP servers to ensure call logs and security certificates remain synchronized.

Answer

Configure NTP only on the publisher node.

Answer

Point each CUCM node to a different NTP server for redundancy.

Answer

Use the publisher as the NTP server for all subscriber nodes.

Question 20

When designing for high availability of Cisco Unified Communications Manager (CUCM) services, which specific configuration ensures that a secondary node takes over call processing if the primary node fails?

Accepted Answer

Configure a CUCM Group in the Device Pool with multiple servers.. The Device Pool and the associated Cisco Unified Communications Manager Group define which servers a device registers with and in what order.

Answer

Set the 'Call Processing Load' value in the System settings.

Answer

Enable Auto-registration for all phones.

Answer

Configure the cluster-wide failover parameter in the Service Parameter page.