Question bank
Implementing and Operating Cisco Collaboration Core Technologies (CLCOR)
40 Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) questions with the correct answer and a written explanation, organised across 6 exam domains.
- 40 questions
- 6 domains
- Foundation level
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Call Control
8 questions in this domain
- Question 1Single Choice
What is the primary purpose of digit manipulation in a CUCM environment?
- AProgrammatic alteration of dialed digitsCorrect answer
- BAssignment of IP addresses to endpoints
- CCreation of end-user accounts
- DUpgrading device firmware
Why this is the answer
Digit manipulation is the programmatic alteration of dialed digits to normalize or modify numbers for compatibility between systems.
- Question 2Multiple Select
Which pattern types can be used to perform digit manipulation? (Choose all that apply.)
- ATranslation PatternsCorrect answer
- BRoute PatternsCorrect answer
- CTransformation PatternsCorrect answer
- DDevice Pools
Why this is the answer
Digit manipulation uses Translation Patterns, Transformation Patterns, and Route Patterns to alter or route dialed digits.
- Question 3Interactive
Refer to the code block. Which pattern type changes the dialed digits during the route lookup process?
- ATranslation PatternCorrect answer
- BTransformation Pattern
- CRoute Pattern
- DRoute List
Why this is the answer
Translation patterns alter digits during the search phase, unlike transformation patterns which operate after routing.
- Question 4Single Choice
What is the main purpose of a Route Pattern?
- ADirect calls toward a specific destinationCorrect answer
- BChange the digits in SIP headers
- CGroup devices into partitions
- DRegister endpoints with the server
Why this is the answer
Route Patterns direct calls to a specific destination such as a gateway or SIP trunk.
- Question 5Multiple Select
Which functions are provided by an H.323 Gatekeeper? (Choose all that apply.)
- AAdmission ControlCorrect answer
- BLocation ServiceCorrect answer
- CCall SignalingCorrect answer
- DNAT Traversal
Why this is the answer
The H.323 Gatekeeper provides Admission Control, Location Service, and Call Signaling.
- Question 6Interactive
Refer to the code block. What is the intended purpose of this SIP message?
- ABind a SIP URI to an IP addressCorrect answer
- BEstablish a media session
- CTerminate a registered endpoint
- DQuery a route group status
Why this is the answer
This is a SIP REGISTER request, which updates the location service by binding the SIP URI to the endpoint's contact address.
- Question 7Single Choice
Which element determines the partitions a specific device can access?
- ACalling Search SpaceCorrect answer
- BRoute Pattern
- CTranslation Pattern
- DSIP Profile
Why this is the answer
A Calling Search Space (CSS) defines which partitions a device is permitted to access.
- Question 8Multiple Select
Which two statements about Partitions and CSS are true? (Choose two.)
- APartitions define the scope of visibility for patterns.Correct answer
- BCSS determines which partitions a device can access.Correct answer
- CCSS contains the dialable numbers assigned to users.
- DDevices can access partitions without a CSS.
Why this is the answer
Partitions are containers for patterns, and CSS grants devices access to specific partitions.
Cisco IOS XE Gateway and Media Resources
8 questions in this domain
- Question 9Single Choice
What is the primary purpose of digit manipulation in a Cisco collaboration solution?
- ATo normalize dialed digits to meet trunk requirementsCorrect answer
- BTo increase call encryption strength
- CTo replace gateway hardware
- DTo manage device registrations
Why this is the answer
Digit manipulation alters dialed digits so numbers match trunk expectations, such as adding prefixes or removing leading zeros for interoperability.
- Question 10Multiple Select
Which two statements correctly compare Route Patterns and Translation Patterns?
- ARoute Patterns send calls to a specific destination such as a gateway or SIP trunk.Correct answer
- BTranslation Patterns modify digits during call routing lookup.Correct answer
- CTranslation Patterns are used only for emergency calls.
- DRoute Patterns change the caller ID in the SIP message.
Why this is the answer
Route Patterns direct calls to destinations; Translation Patterns manipulate digits during the search process. They serve different roles in CUCM routing.
- Question 11Interactive
Refer to the exhibit. What is the resulting called party number after the translation pattern is applied?
- A+14155551234Correct answer
- B914155551234
- C14155551234
- D4155551234
Why this is the answer
The pattern prepends +1 while preserving the ten digits after 91, converting 914155551234 into +14155551234.
- Question 12Single Choice
Which statement best describes a Partition in CUCM?
- AA logical container that defines visibility for patternsCorrect answer
- BA list of devices that may access patterns
- CA route group containing gateways
- DA SIP trunk security profile
Why this is the answer
Partitions group patterns and define their scope of visibility; they do not control device access by themselves.
- Question 13Multiple Select
Which two statements are true about Calling Search Spaces?
- AA CSS is a collection of Partitions.Correct answer
- BA CSS defines which Partitions a device can access.Correct answer
- CA CSS contains the actual route patterns.
- DA CSS is used to encrypt SIP messages.
Why this is the answer
A CSS aggregates Partitions and is assigned to devices to grant access to those Partitions during routing.
- Question 14Interactive
Refer to the exhibit. What happens when a user dials 911 from the configured phone?
- AThe call fails because Sales_CSS does not include Emergency_PT.Correct answer
- BThe call succeeds because 911 is a global emergency route.
- CThe call succeeds because all partitions are visible to all phones.
- DThe call fails because the phone is not registered.
Why this is the answer
A device can only reach patterns in Partitions contained by its assigned CSS. Since Emergency_PT is not in Sales_CSS, the call fails.
- Question 15Single Choice
Which pattern is selected when two patterns match an identical dialed string?
- AThe pattern with the most specific matchCorrect answer
- BThe oldest pattern
- CThe pattern in the smallest partition
- DThe pattern with the lowest Route Group preference
Why this is the answer
CUCM uses the longest match or most specific pattern to avoid unexpected routing when patterns overlap.
- Question 16Multiple Select
Which two statements about pattern overlap are correct?
- AA 5-digit pattern beats a 4-digit pattern if both match.Correct answer
- BCUCM applies the longest match rule to route patterns.Correct answer
- CThe least specific pattern always wins.
- DPattern overlap never affects routing.
Why this is the answer
Longest match prioritizes the most specific pattern, so a longer matching pattern is preferred over a generic one.
Collaboration Applications
8 questions in this domain
- Question 17Single Choice
Which CUCM element is used to modify the dialed digits, such as adding a prefix or stripping a leading digit, before the call is routed?
- ATranslation PatternCorrect answer
- BCalling Search Space
- CRoute List
- DSIP Profile
Why this is the answer
A Translation Pattern is used for digit manipulation within CUCM, altering the dialed digits before the call is routed to a final destination.
- Question 18Multiple Select
Which two statements about Partitions and Calling Search Spaces (CSS) are true?
- APartitions are containers for patterns, and a CSS defines which partitions a device can access.Correct answer
- BA device can reach a pattern only if the pattern's partition is included in the device's CSS.Correct answer
- CSimply placing a pattern in a Partition makes it reachable by every device.
- DA CSS is assigned to a Partition to restrict the digits in that partition.
Why this is the answer
Partitions group patterns for visibility control. A CSS must include the target partition for a device to access the patterns within it.
- Question 19Interactive
Refer to the code block. What is the effect of this translation pattern configuration?
- AIt removes the leading 9 and adds the prefix 1.Correct answer
- BIt only adds the prefix 1 without changing the digits.
- CIt blocks the call after translation.
- DIt changes the destination to a different route list.
Why this is the answer
The translation pattern strips the initial 9 from the dialed digits and prepends 1, normalizing the number for trunk delivery.
- Question 20Single Choice
What is the primary difference between a Route Pattern and a Translation Pattern in CUCM?
- ARoute Patterns direct calls to a specific destination, while Translation Patterns change the digit string.Correct answer
- BTranslation Patterns direct calls to a gateway, while Route Patterns manipulate digits.
- CRoute Patterns are used only for internal calls, while Translation Patterns are used for PSTN calls.
- DThere is no functional difference; they are interchangeable.
Why this is the answer
Route Patterns determine where the call is sent, while Translation Patterns modify the digits before or during the routing decision.
- Question 21Multiple Select
Which two statements correctly describe Transformation Patterns in CUCM?
- AThey change the calling or called party number after the route has been selected.Correct answer
- BThey are often used to normalize numbers for PSTN egress.Correct answer
- CThey are used to add a route list to a call.
- DThey control which partitions a device can access.
Why this is the answer
Transformation Patterns alter party numbers after route selection, commonly to normalize caller ID or called numbers for external networks.
- Question 22Interactive
Review the code block showing a SIP REGISTER message. What is the meaning of the 'Expires: 3600' header?
- AThe registration is valid for 3600 seconds.Correct answer
- BThe call will last a maximum of 3600 seconds.
- CThe endpoint will send an INVITE after 3600 seconds.
- DThe message can traverse up to 3600 hops.
Why this is the answer
In SIP, the Expires header in a REGISTER request sets the validity duration of the registration. After it lapses, the endpoint must re-register.
- Question 23Single Choice
Which function of an H.323 Gatekeeper maps an alias such as an E.164 number to the IP address of an endpoint?
- ALocation ServiceCorrect answer
- BAdmission Control
- CCall Signaling
- DMedia Termination
Why this is the answer
The Location Service maintains a database of aliases and their corresponding IP addresses, resolving endpoint location for call routing.
- Question 24Multiple Select
Which two statements about SIP Registration are correct?
- AThe endpoint initiates registration by sending a REGISTER request.Correct answer
- BRegistration binds the SIP URI to the endpoint's current IP address.Correct answer
- CRegistration is initiated by the registrar to all endpoints.
- DThe REGISTER message establishes a media session between two endpoints.
Why this is the answer
SIP endpoints send REGISTER messages to a registrar to bind their identity to an IP address; this is separate from session setup using INVITE.
Infrastructure and Design
4 questions in this domain
- Question 25Single Choice
What is the primary purpose of digit manipulation in a Cisco Collaboration environment?
- ATo alter dialed digits so they match trunk and gateway requirementsCorrect answer
- BTo restrict access to route patterns
- CTo provide failover between route groups
- DTo manage device registration intervals
Why this is the answer
Digit manipulation changes dialed digits, such as adding prefixes or stripping leading zeros, to normalize numbers for trunk requirements and ensure compatibility between systems.
- Question 26Multiple Select
Which statements about Partitions and Calling Search Spaces (CSS) are true? (Select all that apply.)
- APartitions are containers that define visibility for patterns.Correct answer
- BA CSS determines which partitions a device can access.Correct answer
- CA device can reach a pattern if the pattern is in any partition.
- DThe CSS must contain the target pattern's partition for access.Correct answer
Why this is the answer
Partitions contain patterns; a CSS grants a device access to selected partitions. Adding a pattern to a partition does not make it reachable unless the device's CSS includes that partition.
- Question 27Interactive
Refer to the pattern configuration in the code block. What does this configuration represent?
- AA Translation Pattern that changes digits before route selectionCorrect answer
- BA Route Pattern that selects a destination trunk
- CA Transformation Pattern that changes digits after routing
- DA CSS Pattern that defines device permissions
Why this is the answer
The code shows a Translation Pattern, which alters the digit string during the search phase before the route is selected.
- Question 28Single Choice
What is the role of a SIP endpoint during the registration process?
- AIt sends a REGISTER request to bind its SIP URI to its current IP address.Correct answer
- BIt waits for the registrar to push registration updates.
- CIt sends an INVITE message to update its location.
- DIt sends a 200 OK response to the registrar.
Why this is the answer
Endpoints initiate registration by sending REGISTER requests. The registrar updates its location database, binding the SIP URI to the endpoint's IP address.
Protocols, Codecs and Endpoints
6 questions in this domain
- Question 29Single Choice
What is the primary function of a Translation Pattern within a Cisco Unified Communications environment?
- AAlters digits during the search phaseCorrect answer
- BForwards calls to a specific trunk
- CContains a set of partitions
- DProvides bandwidth management
Why this is the answer
Translation Patterns change digits during the search phase, before a destination is selected. Route Patterns, not Translation Patterns, are used to forward calls toward trunks or gateways.
- Question 30Multiple Select
Which two statements correctly describe Partitions and Calling Search Spaces (CSS)?
- AA container for route patternsCorrect answer
- BDefines the partitions a device can accessCorrect answer
- CAdding a pattern to a Partition makes it reachable
- DA list of patterns and numbers
Why this is the answer
Partitions contain patterns and define visibility scope. A CSS defines which partitions a device can access; adding a pattern to a Partition does not make it reachable unless the device CSS includes that Partition.
- Question 31Interactive
A SIP endpoint sends the request shown to its registrar. What is the purpose of the Expires header in this request?
- AIndicates how long the registration remains validCorrect answer
- BSelects the audio codec for the session
- CSets the maximum number of simultaneous calls
- DDetermines route pattern priority
Why this is the answer
The Expires header defines the registration lifetime. If the endpoint does not refresh before expiry, the registration entry becomes stale and call routing can fail.
- Question 32Single Choice
In which order are Route Lists evaluated when a call is placed?
- ASequentially by Route Group preferenceCorrect answer
- BIn parallel across all Route Groups
- CBased on the calling party username
- DRandomly to balance the load
Why this is the answer
Route Lists contain Route Groups that are evaluated in preference order. If all trunks in one Route Group are unavailable, the system moves to the next Route Group in the list.
- Question 33Multiple Select
Which three functions are provided by an H.323 Gatekeeper?
- AAdmission ControlCorrect answer
- BLocation ServiceCorrect answer
- CCall SignalingCorrect answer
- DMedia encryption enforcement
Why this is the answer
The H.323 Gatekeeper supplies Admission Control, Location Service, and Call Signaling. Media encryption enforcement is not listed as a primary Gatekeeper function in the documentation.
- Question 34Interactive
The transformation pattern shown contains a Called Party Transform Mask. At which stage is this digit manipulation applied?
- AAfter the route has been selectedCorrect answer
- BDuring the initial route search
- CAs soon as the endpoint registers
- DBefore the dial plan is evaluated
Why this is the answer
Transformation Patterns modify digits after the route has been determined. This is different from Translation Patterns, which alter digits during the route search phase.
Quality of Service
6 questions in this domain
- Question 35Single Choice
Which CUCM pattern type is used to alter dialed digits to match a different number format inside the call control system?
- ARoute Pattern
- BTranslation PatternCorrect answer
- CTransformation Pattern
- DCalling Search Space
Why this is the answer
Translation Patterns alter the digit string during the search phase, re-mapping the call to a different pattern inside the system. This is the key difference from route and transformation patterns.
- Question 36Multiple Select
Which two statements correctly describe Translation Patterns in a Cisco Unified CM dial plan?
- AThey direct calls toward a specific destination such as a SIP trunk.
- BThey can change a number format by adding a prefix without changing the destination.Correct answer
- CThey are applied after the route has been selected.
- DThey modify digits during the search phase of call routing.Correct answer
Why this is the answer
Translation Patterns modify digits during dial-plan lookup and can add a prefix without changing the destination. They are not used to direct calls or to transform digits after route selection.
- Question 37Interactive
Refer to the dial plan excerpt in the code block. What is the purpose of the configured pattern type?
- AIt sends the call directly to a PSTN gateway without further lookup.
- BIt changes the digits and the call continues through the call-routing process.Correct answer
- CIt blocks the call by applying a reject action.
- DIt only modifies the caller ID before the call is forwarded.
Why this is the answer
Translation Patterns change digits during the routing search and allow the call to continue through the dial plan. Route selection occurs after the digit change has been applied.
- Question 38Single Choice
In Cisco Unified CM, what is the primary purpose of a Partition?
- AIt defines the scope of visibility for patterns.Correct answer
- BIt determines which partitions a device can access.
- CIt routes calls to external gateways.
- DIt manages SIP registration state.
Why this is the answer
Partitions define the visibility scope for patterns. A device needs a CSS that contains the partition in order to reach the pattern.
- Question 39Multiple Select
Which two statements about Calling Search Spaces and Partitions are correct?
- AA CSS contains a list of partitions that a device can access.Correct answer
- BA Partition acts as a container for patterns.Correct answer
- CA CSS can contain patterns directly without referencing a partition.
- DPartitions are used to store route groups for gateway selection.
Why this is the answer
A CSS is a list of partitions that a device can access, while a Partition is a container for patterns. This separation provides permission-based routing.
- Question 40Interactive
A phone is assigned the CSS shown in the code block. Which partition or partitions can that phone access?
- AMarketing_PT only
- BSales_PT only
- CBoth Marketing_PT and Sales_PTCorrect answer
- DNeither partition
Why this is the answer
The CSS shown includes both Marketing_PT and Sales_PT, so the phone can reach any pattern in either partition. A CSS grants access to all listed partitions.
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