CLCOR Practice Test 10 — 10 Questions

Question 1

What is the primary function of the CUBE in a SIP trunking scenario?

Accepted Answer

Demarcation and SIP normalization. The CUBE (Cisco Unified Border Element) acts as a demarcation point between the enterprise network and the service provider, handling SIP normalization, media relay, and security.

Answer

Call routing for internal phones

Answer

Voice messaging storage

Answer

DHCP Server functionality

Question 2

Which THREE of the following are valid reasons to use a Media Termination Point (MTP)?

Accepted Answer

Bridging different signaling protocols. MTPs are used for DTMF conversion, protocol bridging, and codec/media type compatibility.

Answer

Providing transcoding for G.711 to G.729

Answer

Increasing voice bandwidth

Question 3

You are troubleshooting a scenario where internal calls between two offices are using the G.711 codec, but you want them to use G.729 to save bandwidth. Where should you change the codec setting?

Accepted Answer

System > Region Information > Region. The codec used between two devices is determined by the Region setting. You must update the Region matrix to specify G.729 between the two regions.

Answer

Device > Device Settings > Common Device Configuration

Answer

System > Device Pool

Answer

System > Location

Question 4

A user reports that their calls are failing when they roam to a different physical office site. You observe that the device is registered to the primary CUCM cluster but the Location-based CAC is blocking the call. What is the most likely cause?

Accepted Answer

The device is not assigned to a Device Pool with the correct Location configured for the new site.. If a device roams, it may inherit a different Location assigned via the Device Pool. If the bandwidth limit between the new location and the destination is exceeded, the call will be rejected.

Answer

The Region setting in the Device Pool has a lower bitrate than the required codec.

Answer

The device must be re-registered to a local subscriber instead of the primary cluster.

Answer

The Calling Search Space is not configured to allow inter-site dialing.

Question 5

You are configuring a SIP trunk between CUCM and a CUBE. Which setting is critical to ensure that the SIP signaling is encrypted?

Accepted Answer

SIP Trunk Security Profile. A SIP Trunk Security Profile is where you define the security mode (Authenticated or Encrypted) for the trunk.

Answer

Enterprise Parameters

Answer

Device Pool

Answer

SIP Profile

Question 6

Which protocol is primarily used by CUCM to communicate with endpoints for registration and call control?

Accepted Answer

SIP. SCCP (Skinny) or SIP are the two primary protocols used by endpoints to register with CUCM.

Answer

SNMP

Answer

MGCP

Answer

H.323

Question 7

Which service must be running for a phone to receive its configuration file?

Accepted Answer

Cisco TFTP. The Cisco TFTP service provides the configuration files to endpoints upon registration.

Answer

Cisco Database Layer Monitor

Answer

Cisco CallManager

Answer

Cisco CTI Manager

Question 8

Which statement best describes the difference between policing and shaping?

Accepted Answer

Policing drops traffic, whereas shaping buffers it. Policing drops traffic that exceeds the limit, while shaping buffers the excess traffic to smooth out the flow.

Answer

Policing buffers traffic, whereas shaping drops it

Answer

Both use buffers to manage congestion

Answer

Both are applied only on ingress interfaces

Question 9

You are implementing a centralized dial plan. You have multiple sites, each with local PSTN gateways. How can you ensure that an emergency call from a specific site is always routed to the local PSTN gateway of that site?

Accepted Answer

Use site-specific partitions and assign the local gateway to a CSS that includes that partition.. By using a combination of Partitions and CSS, you can ensure that the emergency route pattern is reachable by all, but the specific route pattern matches the local gateway's partition.

Answer

Use Transformation Masks on the device.

Answer

Configure the location in the device pool to match the site.

Answer

Create a separate CUCM cluster for each site.

Question 10

Which THREE of the following tasks are required to set up a basic SIP trunk in CUCM?

Accepted Answer

Create a SIP Trunk Security Profile. Setting up a SIP trunk requires a Security Profile, a SIP Profile, and the trunk device itself.

Answer

Create a Route Filter

Answer

Create a Translation Pattern