CLCOR Practice Test 19 — 15 Questions

Question 1

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?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Activation Code. The Activation Code or the specific Device Configuration profile in Control Hub provides the credentials needed for the device to authenticate against the cloud service.

Answer

TFTP Address

Answer

SIP Digest User

Answer

VLAN ID

Question 2

Which TWO features are provided by the Cisco Webex App when registered as a Softphone?

Accepted Answer

SIP signaling. Webex provides softphone signaling (SIP) and audio/video media capabilities.

Answer

TFTP service hosting

Answer

DNS root server

Answer

DHCP server functionality

Question 3

Which TWO protocols are used for managing the quality and monitoring of VoIP sessions?

Accepted Answer

RTCP. RTCP is used for quality feedback, and SNMP or various management protocols are used for monitoring.

Answer

TFTP

Answer

SIP

Answer

RTP

Question 4

Which object acts as the primary container for a specific set of users in CUCM?

Accepted Answer

User Group. While users are added to the system, they are often grouped into User Groups for permission management.

Answer

Device Pool

Answer

Location

Answer

Partition

Question 5

When troubleshooting CUBE SIP normalization, which tool allows you to view the normalized SIP messages in real-time?

Accepted Answer

debug ccsip messages. debug ccsip messages provides the view of the SIP signaling, including headers modified by normalization.

Answer

show voice class sip-profiles

Answer

debug voip ccapi inout

Answer

debug sip-ua

Answer

show sip-profile

Question 6

Which TWO of the following are valid methods for providing high availability for IP phones in a CUCM design?

Accepted Answer

SRST deployment. CUCM Groups (primary/secondary) and SRST (for WAN outage survivability) are the two primary methods for ensuring phone availability.

Answer

Configuring multiple TFTP servers in Option 150

Answer

IP address redundancy via DHCP

Answer

Load balancing via round-robin

Question 7

Which THREE network conditions contribute to poor VoIP call quality in an RTP stream?

Accepted Answer

Latency. Latency, jitter, and packet loss are the primary enemies of voice quality.

Answer

High MTU

Answer

Fast switching

Question 8

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

Accepted Answer

TFTP Service. The TFTP service in CUCM acts as the repository for device configuration files.

Answer

CallManager Service

Answer

CTI Manager

Answer

Webex Control Hub

Question 9

To ensure that G.729 is used for all inter-site calls but G.711 is used for intra-site calls, what specific CUCM construct must you define?

Accepted Answer

Region Relationship. You must define Regions and then assign the 'Region Relationship' to dictate the codec allowed between those regions.

Answer

Location

Answer

Device Pool

Answer

Transcoder

Question 10

Which TWO factors significantly impact the choice of audio codec during a call setup in CUCM?

Accepted Answer

Codec Preference List. Bandwidth availability (Regions) and codec preference (Codec List) are the main determinants.

Answer

DNS Server

Answer

VLAN ID

Answer

NTP Server

Question 11

Which CUCM feature allows an administrator to automatically register new phones using a pre-defined device template?

Accepted Answer

Auto-Registration. 'Auto-Registration' allows phones to join the cluster without manual configuration if the 'Auto-Registration' range is configured in the CUCM system parameters.

Answer

Device Provisioning

Answer

Extension Mobility

Answer

Bulk Administration Tool (BAT)

Question 12

Which field in the SIP INVITE SDP body specifies the media attributes such as codec type?

Accepted Answer

m= line. The 'm=' (media) line specifies the media type, port, protocol, and codec information.

Answer

o= line

Answer

c= line

Answer

s= line

Question 13

Which THREE steps are involved in the 'Cisco Unified Communications Manager' disaster recovery process?

Accepted Answer

Perform a full system backup using DRS.. DRS (Disaster Recovery System) requires a backup, a clean install of the same version, and a restore operation.

Answer

Delete the existing TFTP files.

Answer

Run the 'utils dbreplication reset' command.

Question 14

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

Accepted Answer

SIP. Webex Room devices can use SIP to register to on-premises CUCM systems.

Answer

MGCP

Answer

SCCP

Answer

H.323

Question 15

Which TWO of the following are valid methods to troubleshoot SIP call failures on a CUBE?

Accepted Answer

show call active voice. debug ccsip messages and show call active voice are the primary tools for diagnosing SIP signaling and active session state.

Answer

debug voice translation

Answer

debug voice class

Answer

show sip-profile status