Free CLCOR Practice Questions

Question 1

A CUCM phone's line calling search space contains PT-Branch, with route pattern 81XX pointing to Trunk A. Its device calling search space contains PT-Corporate, with 812X pointing to Trunk B. These are the only matching patterns, and both trunks are available. How does CUCM route a call to 8127?

Accepted Answer

Trunk B, because 812X is the most specific match across both CSSs.

Answer

Trunk A, because line CSS partitions take precedence.

Answer

Either trunk, because the matching patterns have equal digit lengths.

Answer

Trunk B, because the device CSS replaces the line CSS for external calls.

Question 2

Dialing 0 at a Webex Calling location still reaches the former receptionist. Both an organization translation pattern and a location translation pattern match 0. The organization pattern has been updated to the new receptionist's number, which works when dialed directly. The move affects only this office. Where should the administrator make the remaining change?

Accepted Answer

Update the location translation with the new receptionist's number.

Answer

Re-create the organization translation using the new reception number.

Answer

Create a dial-plan entry matching the new receptionist's complete number.

Answer

Allow the new receptionist's number in the location's outgoing permissions.

Question 3

A technician flags the following exchange while commissioning a registration-based CUBE trunk:

CUBE → registrar: REGISTER
Registrar → CUBE: 401 Unauthorized with a digest challenge
CUBE → registrar: REGISTER with the digest response
Registrar → CUBE: 200 OK accepting registration

CUBE now reports successful registration. How should the engineer handle this result?

Accepted Answer

Proceed with inbound and outbound call tests to validate routing and media.

Answer

Reset the digest password on CUBE and the registrar before testing calls.

Answer

Hold the trunk out of service until the carrier resolves the 401 response.

Answer

Increase the registration lifetime to prevent further authentication challenges.

Question 4

A CUCM SIP trunk must authenticate its CUBE peer as cube-east.example.com. After a certificate replacement, TCP connects but TLS fails. The certificate chain is trusted, the dates and system clocks are correct, and both the certificate's subject common name and its only DNS subject alternative name are cube-west.example.com. Which correction preserves the required peer identity and certificate validation?

Accepted Answer

Reissue the CUBE certificate with cube-east.example.com as a DNS SAN.

Answer

Import the issuing CA chain into CUCM's trust store.

Answer

Add a cube-west.example.com DNS alias pointing to the existing CUBE address.

Answer

Require CUCM to present a client certificate during the TLS negotiation.

Question 5

An emergency-call acceptance test exposes a delay: a CUCM phone sends digits one at a time, and CUCM waits after the third digit of 911. The effective CSS contains an exact 911 route pattern and a longer 911X pattern; neither has Urgent Priority enabled. The emergency trunk is available. The requirement is immediate routing when 911 is complete. Which setting should be changed?

Accepted Answer

Enable Urgent Priority on the exact 911 route pattern.

Answer

Move the 911 partition to the front of the CSS.

Answer

Enable Urgent Priority on the longer 911X route pattern.

Answer

Assign the 911 pattern to a dedicated emergency route list.

Question 6

A wireless voice survey records the following during choppy calls:

Received signal strength: −61 dBm
Signal-to-noise ratio: 31 dB
Channel utilization: 78%

The site's design targets are at least −67 dBm, at least 25 dB SNR, and channel utilization below 50%. Voice uses WMM UP 6, and the wired voice queue has no drops. Which finding and response best fit these measurements?

Accepted Answer

The radio channel is congested; reduce contention for wireless airtime.

Answer

Signal strength is inadequate; increase access-point transmit power.

Answer

Voice has the wrong access category; change WMM UP 6 to UP 5.

Answer

The WAN priority queue is undersized; increase its bandwidth allocation.

Question 7

Before starting full synchronization with Webex Directory Connector for three offices, an engineer runs a dry-run synchronization. It proposes deleting the cloud accounts of employees at the third office, although those employees can still sign in through SSO. Their Active Directory accounts are in an organizational unit omitted from the connector's scope. What is the appropriate next step toward synchronized provisioning for all three offices?

Accepted Answer

Include the missing organizational unit and review a new dry run.

Answer

Run the full sync; SSO will protect the existing accounts.

Answer

Reset cloud passwords and repeat the dry run.

Answer

Suspend the directory rollout and retain manual provisioning for all three offices.

Question 8

A Cisco IOS XE gateway receives called number 914155550123. The trace selects incoming dial-peer 100 but finds no outgoing match. Other call settings are correct.

voice translation-rule 10
 rule 1 /^9$.*$$/ /\1/
voice translation-profile STRIP_ACCESS
 translate called 10
dial-peer voice 100 voip
 incoming called-number 9T
dial-peer voice 200 voip
 destination-pattern 1415555....
 translation-profile outgoing STRIP_ACCESS
 session protocol sipv2
 session target ipv4:192.0.2.20

The destination pattern on dial-peer 200 must stay unchanged. How should STRIP_ACCESS be applied so this call can select that peer?

Accepted Answer

Move it to the incoming direction on dial-peer 100.

Answer

Keep it outbound on dial-peer 200 and lower that peer's preference value.

Answer

Move it to the incoming direction on dial-peer 200.

Answer

Use translate calling 10 in the outbound profile.

Question 9

Two offices share a CUCM PSTN route pattern and a route list that uses a logical local route group. East phones use DP-East; West phones use DP-West. Both device pools map that local route group to RG-West, so both sites exit through the West trunk. RG-East contains a working East trunk. Which edit gives East local egress while preserving West's egress and the shared route pattern and route list?

Accepted Answer

Change the local route group mapping in DP-East to RG-East.

Answer

Place RG-East ahead of the local route group in the shared route list.

Answer

Make the East trunk the first member of RG-West.

Answer

Assign DP-East a CUCM group whose primary node serves the East office.

Question 10

A branch must support 10 simultaneous G.711 calls over a full-duplex WAN. Each direction of each call carries 64 kbit/s of payload in 20 ms packets, with 40 additional bytes of IPv4, UDP, and RTP headers per packet. The proposed reservation is 640 kbit/s in each direction. Ignoring all other overhead and assuming continuous transmission, what minimum reservation should replace it in each direction?

Accepted Answer

800 kbit/s

Answer

720 kbit/s

Answer

1,280 kbit/s

Answer

1,600 kbit/s

Free CLCOR Practice Questions

Domain 1: Infrastructure and Design 15% of exam

Question 1

Question 2

Domain 2: Protocols and Endpoints 10% of exam

Question 3

Domain 3: On-Premises Call Control 30% of exam

Question 4

Question 5

Question 6

Domain 4: Voice Gateways and Session Border Controllers 10% of exam

Question 7

Domain 5: Cloud and Hybrid Services 25% of exam

Question 8

Question 9

Domain 6: Media and QoS 10% of exam

Question 10

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