CLCOR Practice Test 15 — 15 Questions

Question 1

Which field in a Route Pattern can be used to discard the first few digits of a dialed number before routing?

Accepted Answer

Discard Digits. The 'Discard Digits' field in a Cisco Unified Communications Manager Route Pattern is specifically designed to strip leading digits from the dialed number before the call is routed. It uses predefined discard digit instructions (such as PreDot, PreAt, or NoDigits) to remove unwanted prefixes like access codes or area codes. This transformation occurs before the number is presented to the destination, ensuring the correct digits are sent.

Answer

Calling Search Space

Answer

Called Party Transform Mask

Answer

Route Filter

Question 2

What is the primary function of the Cisco Webex Edge Audio service?

Accepted Answer

To allow calling into Webex meetings via the corporate PSTN network.. Webex Edge Audio is a service that lets organizations route Webex meeting audio through their existing corporate PSTN/telephony infrastructure instead of the Webex cloud PSTN. This allows participants to dial into meetings using corporate phone lines, reducing toll costs and leveraging existing carrier contracts. It bridges on-premises voice gateways (CUBE/Expressway) with the Webex cloud for inbound and outbound audio.

Answer

To allow users to join meetings without an internet connection.

Answer

To encrypt all meeting audio traffic.

Answer

To provide high-definition video conferencing.

Question 3

You 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?

Accepted Answer

CSV Template upload in Control Hub. The CSV template upload in Control Hub is the supported bulk onboarding method for migrating users to Webex Calling while preserving directory synchronization. You export user data (often from Active Directory or CUCM), populate the Webex-provided CSV template with required fields, and upload it to Control Hub, which provisions users and links them to the existing directory sync (e.g., via Microsoft Entra ID or Cisco Directory Connector). This maintains identity consistency across the migration.

Answer

Webex Edge for Devices

Answer

CUCM AXL API bulk exporter

Answer

Webex Migration Tool

Question 4

What is the primary function of a 'Location' object in CUCM?

Accepted Answer

To perform Call Admission Control (CAC).. The primary function of a Location object in CUCM is to perform Call Admission Control (CAC), which limits the number of simultaneous calls (audio/video bandwidth) between locations to prevent oversubscription of WAN links. Locations define the available bandwidth and track usage for calls between them. Other settings like time zone, CSS, and codec are handled by other objects.

Answer

To define the phone's time zone.

Answer

To define the phone's CSS.

Answer

To define the phone's codec.

Question 5

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) is Cisco's session border controller function that sits at the edge between the enterprise VoIP network and the ITSP's SIP trunk. Its primary role is to provide a demarcation point and perform SIP normalization — translating between different SIP dialects, header formats, and SDP variations so that the enterprise and provider can interoperate. It also handles topology hiding, security, and call admission control at that boundary.

Answer

Call routing for internal phones

Answer

Voice messaging storage

Answer

DHCP Server functionality

Question 6

Which component in the CUCM dial plan allows you to match a pattern and simultaneously transform it into a new number before the final route lookup?

Accepted Answer

Translation Pattern. A Translation Pattern in CUCM matches a dialed pattern and transforms it into a new number before the final route lookup. It can add, remove, or replace digits and then apply a CSS to route the translated number. This is used for dial plan normalization, such as converting a 4-digit extension to an E.164 number or implementing global dialing.

Answer

Route Pattern

Answer

Partition

Answer

Route Group

Question 7

You 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?

Accepted Answer

SIP Trunk via Local Gateway. A SIP Trunk via Local Gateway must be configured because the Local Gateway (LGW) is the on-premises component that connects Webex Calling to the PSTN through a local SIP trunk, allowing migrated users to make and receive external calls. The LGW registers with Webex Calling and bridges cloud-registered endpoints to the on-premises PSTN provider. This is the required component for PSTN connectivity when using Local Gateway.

Answer

Webex Edge Connect

Answer

Webex Calling Cloud Connected PSTN

Answer

Unified Border Element (CUBE) API

Question 8

You are configuring a Cisco IOS router to perform traffic shaping for voice traffic. Why is traffic shaping often used in conjunction with queuing?

Accepted Answer

To prevent interface congestion by smoothing out traffic bursts. Traffic shaping is used with queuing to prevent interface congestion by smoothing out traffic bursts — it buffers excess traffic and releases it at a configured rate (e.g., the CIR), ensuring the interface does not exceed the contracted bandwidth. Queuing then schedules the shaped traffic according to class priorities, so shaping and queuing work together to manage congestion and protect voice quality.

Answer

To prioritize voice over data traffic

Answer

To reduce the CPU utilization of the router

Answer

To increase the total throughput of the interface

Question 9

An endpoint sends a SIP REGISTER request. CUCM returns a 401 Unauthorized response. What is the next logical step in the SIP signaling flow for the endpoint?

Accepted Answer

Resend REGISTER with Authorization header. When CUCM returns 401 Unauthorized to a SIP REGISTER, it is issuing a challenge under SIP digest authentication (RFC 3261). The endpoint must compute the digest response using its credentials and the challenge nonce, then resend the REGISTER with an Authorization header containing that response. This is the standard challenge-response handshake for SIP registration.

Answer

Switch to SCCP

Answer

Terminate the TCP connection

Answer

Send a SIP INVITE

Question 10

You are configuring QoS for a Cisco Unified Communications Manager (CUCM) deployment. You need to ensure that audio media traffic between endpoints is marked correctly. Which DSCP value should be assigned to RTP audio traffic according to the Cisco SRND best practices?

Accepted Answer

DSCP 46 (EF). Cisco SRND best practices mark voice RTP media with DSCP EF (46), which maps to the Expedited Forwarding per-hop behavior defined in RFC 3246. EF provides low latency, low jitter, and low loss — exactly what voice media requires. Call signaling is marked CS3 (24), and video is typically AF41 (34), so EF is reserved for audio.

Answer

DSCP 34 (AF41)

Answer

DSCP 24 (CS3)

Answer

DSCP 0 (BE)

Question 11

Which statement best describes the difference between policing and shaping?

Accepted Answer

Policing drops traffic, whereas shaping buffers it. Policing and shaping both measure traffic against a configured rate, but they react differently when the rate is exceeded. Policing simply drops (or remarks) packets that exceed the committed rate, making it a hard enforcement mechanism typically applied on ingress. Shaping, on the other hand, buffers excess packets and delays their transmission so they are sent later within the configured rate, smoothing bursts rather than discarding them.

Answer

Policing buffers traffic, whereas shaping drops it

Answer

Both use buffers to manage congestion

Answer

Both are applied only on ingress interfaces

Question 12

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

Accepted Answer

Active Directory service account privileges.. During the Webex Hybrid Service connector installation, the installer validates the Active Directory service account privileges (B) because the connector needs a properly privileged AD account to sync users and groups to the Webex cloud. It also verifies the outbound HTTPS connection to the cloud (D), since the connector must reach Webex services over TCP 443 for registration and ongoing communication. The SSL/TLS certificate trust chain (E) is checked as well, ensuring the connector trusts the cloud endpoint's certificate and can establish secure TLS sessions. The local PBX manufacturer (A) is not verified by the connector installer, as it is irrelevant to connector prerequisites, and the user's home network speed (C) is not tested because the connector is a server-side component whose bandwidth requirements are not validated during installation.

Answer

The local PBX manufacturer.

Answer

User's home network speed.

Question 13

In a multi-site deployment, you have a requirement to transcode between G.711 and G.729. If the transcoder resources are exhausted, what is the expected outcome for a new call requiring this conversion?

Accepted Answer

The call will be rejected. When transcoder resources are exhausted, Cisco Unified Communications Manager (CUCM) cannot allocate the necessary DSP resources to convert between G.711 and G.729 codecs. Without a transcoder, the two endpoints cannot negotiate a common codec, so the call is rejected with a cause code indicating resource unavailability (typically 'No Bandwidth' or 'Unavailable').

Answer

The call will use G.711 regardless

Answer

The call will proceed with no audio

Answer

The call will fall back to an MTP

Question 14

Which TWO of the following describe the purpose of the Webex Edge for Devices service?

Accepted Answer

Enables hybrid registration (CUCM + Cloud). Option D is correct because Webex Edge for Devices enables hybrid registration, allowing endpoints to register to on-premises Cisco Unified Communications Manager (CUCM) while still consuming Webex cloud services such as Webex Meetings and Webex Calling. Option E is correct because the service provides cloud-based management and control of devices that remain registered on-premises, letting administrators manage them through Control Hub. Options A and B are incorrect because Webex Edge for Devices is not a local gateway provisioning tool nor a SIP trunking gateway; those functions belong to services like Cisco Unified Border Element (CUBE) or Webex Edge Connect. Option C is incorrect because Webex Edge for Devices does not replace a web proxy; proxy requirements are handled separately by the organization's network and Webex Edge Connect design.

Answer

Automatically provisions local gateways

Answer

Provides a SIP trunking gateway

Answer

Replaces the need for a web proxy

Question 15

Which THREE parameters are affected when you change the 'Location' of a device?

Accepted Answer

Video bandwidth limits. Changing a device's Location in Cisco Unified Communications Manager applies the region and location bandwidth policies tied to that Location, so it directly affects the video bandwidth limits (A) and audio bandwidth limits (D) available for calls involving that device, since Location defines the maximum audio/video bit rate allowed between locations. It also changes the RSVP-enabled path (E), because Locations are used with RSVP-based call admission control to determine the reserved path and bandwidth between sites. The phone's directory number (B) is assigned independently via line/DN configuration and is not altered by moving the device to another Location. The phone's display language (C) is a device/user locale setting and is unrelated to Location-based bandwidth or RSVP parameters.

Answer

The phone's directory number.

Answer

The phone's display language.