CLCOR Practice Test 5 — 10 Questions

Question 1

You have a cluster with multiple nodes. You want to ensure that phones in the 'New York' office prioritize registration to a 'New York' subscriber. How do you implement this?

Accepted Answer

Create a CM Group with the local subscribers and assign it to the Device Pool.. A Cisco CallManager Group (CM Group) defines an ordered list of subscribers that devices in an associated Device Pool will register to. By creating a CM Group containing the New York subscribers and assigning it to the Device Pool used by New York phones, those phones will prefer the local subscriber for registration, keeping signaling local and reducing WAN dependency. This is the standard CUCM mechanism for call processing redundancy and locality.

Answer

Use a Route Group to point to the subscriber.

Answer

Assign the phones to a specific Region.

Answer

Configure the TFTP server address in the phone.

Question 2

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

Accepted Answer

TFTP Service. The Cisco TFTP service, running on Cisco Unified Communications Manager, is responsible for serving XML configuration files, phone firmware, and other provisioning files to IP phones during registration. When a phone boots, it requests its SEP<MAC>.cnf.xml file from the TFTP server, which contains its directory number, device pool, and cluster settings. Without TFTP, phones cannot complete registration.

Answer

CallManager Service

Answer

CTI Manager

Answer

Webex Control Hub

Question 3

You notice high latency on calls placed through a Local Gateway. Which metric should you inspect in the Webex Control Hub to confirm the issue is with the network path?

Accepted Answer

Network latency and jitter.. Network latency and jitter are key metrics that measure the quality of the network path. High latency indicates delay in packet delivery, while jitter measures variation in delay, both of which directly affect voice quality. Inspecting these metrics in Webex Control Hub can confirm if the issue is with the network path.

Answer

Calling license usage.

Answer

User status.

Answer

Device firmware version.

Question 4

A Cisco Unified Border Element (CUBE) is deployed between Cisco Unified Communications Manager and a SIP provider. The provider sends an INVITE with a Diversion header containing the original called number. You need to strip the Diversion header before sending the INVITE to Unified CM. Which configuration element should you use?

Accepted Answer

voice class sip-profiles with a sip-header Diversion remove rule applied on the outbound dial peer. To remove a SIP header such as Diversion, you must use a voice class sip-profiles with a sip-header command that specifies the header name and the action. The profile is then applied to the outbound dial peer so that the header is stripped from the INVITE before it is sent to the next hop. This is the standard method on CUBE.

Answer

dial-peer voice with the diversion-header disable command

Answer

voice class uri with a diversion pattern to match and block the header

Answer

voice service voip with the sip-header Diversion remove command

Question 5

You have configured a Cisco Unified CM Route List with two Route Groups: one containing a SIP trunk to Provider A and another containing a SIP trunk to Provider B. You want calls to be attempted to Provider A first, and only if that fails, to Provider B. Which Route List configuration ensures this behavior?

Accepted Answer

Set the Route List's distribution algorithm to Top Down and ensure the Route Group for Provider A is listed first.. To route calls to Provider A first and then Provider B only on failure, the Route List must use the Top Down distribution algorithm and list the Route Group for Provider A before Provider B. Top Down tries each Route Group in order, providing sequential failover. Other algorithms like Circular or Longest Idle do not provide this strict primary/secondary behavior.

Answer

Set the Route List's distribution algorithm to Broadcast and ensure the Route Group for Provider A is listed first.

Answer

Set the Route List's distribution algorithm to Circular and ensure the Route Group for Provider A is listed first.

Answer

Set the Route List's distribution algorithm to Longest Idle and ensure the Route Group for Provider A is listed first.

Question 6

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

Accepted Answer

LDAP. The Webex Hybrid Directory Connector synchronizes user data from on-premises Active Directory to the Webex cloud, and it uses LDAP (Lightweight Directory Access Protocol) to query and read directory information from Active Directory. LDAP is the standard protocol for accessing and maintaining distributed directory information services.

Answer

XML

Answer

SIP

Answer

SNMP

Question 7

What is the primary benefit of the 'Webex Edge' strategy?

Accepted Answer

It optimizes the quality and reliability of Webex traffic.. Webex Edge is a set of hybrid options that let enterprises leverage their existing on-premises infrastructure and network to improve the quality, reliability, and manageability of Webex traffic. By peering Webex traffic through the customer's own network or dedicated connections rather than the public internet, latency and jitter are reduced, and the customer gains visibility and control. It does not replace the Webex cloud — it optimizes how traffic reaches it.

Answer

It allows you to use your own cloud hosting.

Answer

It removes the need for user authentication.

Answer

It eliminates the need for internet access.

Question 8

Which TWO tasks must be performed when setting up Webex Hybrid Calendar service with Microsoft Exchange?

Accepted Answer

Grant the service account ApplicationImpersonation rights. Option D is correct because the Webex Hybrid Calendar service connects to Microsoft Exchange on-premises via Exchange Web Services (EWS) using a dedicated service account, and that account must be granted the ApplicationImpersonation management role so it can act on behalf of users to read and manage their calendar data. Option E is correct because the Hybrid Calendar service must be activated and configured in Control Hub (the Webex administrative portal), where you enable the service and supply the Exchange environment details and service account credentials that tie the on-premises deployment to the cloud service. Options A, B, and C are incorrect: no dedicated DNS zone for Exchange is required, Hybrid Calendar does not use a SIP trunk between Exchange and Webex, and no H.323 gateway in the DMZ is involved since the integration relies on HTTPS/EWS rather than telephony signaling.

Answer

Create a dedicated DNS zone for Exchange

Answer

Configure a SIP trunk between Exchange and Webex

Answer

Install an H.323 gateway in the DMZ

Question 9

You are monitoring RTP traffic using a protocol analyzer. You observe that the Payload Type field in the RTP header is set to 0. Which codec is currently in use?

Accepted Answer

G.711 PCMU. In the RTP header, the Payload Type (PT) field value of 0 indicates the use of the G.711 PCMU (μ-law) codec. This is defined in RFC 3551, which assigns static payload type 0 to PCMU. Therefore, the correct answer is G.711 PCMU.

Answer

G.729

Answer

Opus

Answer

G.711 PCMA

Question 10

You are designing a dial plan with a centralized PSTN egress. What must you configure to ensure that local extensions can be dialed directly across sites?

Accepted Answer

A CSS that includes all site-specific partitions.. In a centralized PSTN egress design, each site's extensions reside in site-specific partitions. To allow any site to dial another site's extensions directly, the calling devices need a Calling Search Space (CSS) that includes all site-specific partitions. This enables the dial plan to match the dialed extension in the appropriate partition and route the call internally.

Answer

A shared device pool.

Answer

A translation pattern for each extension.

Answer

A route pattern that includes all extensions.