View Full Cisco CCNP Collaboration 350-801 Exam Dumps and Practice Test Dumps.

 

Question 361

Which CUCM configuration determines which dial-plan partitions a directory number can access?

1. Device Pool
2. Region
3. Media Resource Group
4. Calling Search Space

Correct Answer: 4

Explanation

A Calling Search Space, or CSS, determines which partitions a directory number or device can access when processing a call. CUCM combines CSS and partition configuration to control calling privileges and determine which destinations are reachable. Administrators can use different CSSs to provide different levels of access, such as internal-only, local, long-distance, or international calling. Device pools provide common endpoint configuration, regions control codec and bandwidth relationships, and media resource groups organize media resources. Proper CSS design is an important part of CUCM dial-plan security because it allows organizations to control access to specific patterns without individually configuring every possible destination.

Question 362

Which SIP request is used to terminate an established call?

1. OPTIONS
2. BYE
3. REGISTER
4. INVITE

Correct Answer: 2

Explanation

The SIP BYE request is used to terminate an established session. Either endpoint can send a BYE when it wants to end an active voice or video call. The receiving side normally returns a final response confirming that the request was processed. INVITE is used to establish or modify a session, REGISTER is used to register an endpoint with a SIP registrar, and OPTIONS is commonly used to query capabilities or availability. When troubleshooting unexpected call termination, engineers can examine SIP traces to determine which endpoint or intermediary generated the BYE and whether the message was followed by the expected response.

Question 363

Which CUCM object matches a dialed digit pattern and can send the call toward a gateway or trunk?

1. Route Pattern
2. Device Pool
3. Region
4. Media Resource Group

Correct Answer: 1

Explanation

A route pattern defines a sequence or pattern of digits that CUCM can use to determine how a call should be routed. When the digits dialed by a user match the configured pattern, CUCM can send the call toward a configured route list, gateway, or trunk depending on the design. Route patterns are fundamental to enterprise dial plans because they allow administrators to distinguish between internal extensions, service numbers, local calls, long-distance calls, and other destinations. Device pools manage common endpoint settings, regions control codec and bandwidth relationships, and media resource groups organize conferencing and transcoding resources.

Question 364

Which protocol is commonly used to synchronize the clocks of CUCM servers and other collaboration devices?

1. DNS
2. LDAP
3. NTP
4. RTP

Correct Answer: 3

Explanation

Network Time Protocol, or NTP, is used to synchronize system clocks across networked devices and servers. Consistent time is important in Cisco collaboration environments because logs, authentication mechanisms, certificates, call records, and troubleshooting data often depend on accurate timestamps. CUCM and related collaboration components should use reliable and properly configured NTP sources. DNS performs name resolution, LDAP provides directory services, and RTP transports real-time media. If collaboration servers have significantly different system times, administrators may encounter certificate or authentication problems and may find it difficult to correlate events across multiple systems. Accurate NTP configuration is therefore an important operational requirement.

Question 365

Which CUCM configuration groups gateways or trunks into a logical collection for call routing?

1. Route Group
2. Partition
3. Region
4. Device Pool

Correct Answer: 1

Explanation

A route group is a CUCM dial-plan object that contains gateways or trunks used for call routing. It allows administrators to organize multiple routing resources into a logical collection and can provide redundancy when more than one gateway or trunk is available. Route groups are normally referenced by route lists, which are then selected by route patterns. Partitions control access to dial-plan objects, regions manage codec and bandwidth relationships, and device pools provide common endpoint settings. When an external call fails, engineers can inspect the route pattern, route list, route group, and gateway or trunk status to determine whether CUCM had an available routing path.

Question 366

Which protocol protects RTP media by providing encryption and integrity mechanisms?

1. SIP
2. TLS
3. LDAP
4. SRTP

Correct Answer: 4

Explanation

Secure Real-time Transport Protocol, or SRTP, provides security for RTP-based audio and video media. It can encrypt media and provide integrity protection so that unauthorized parties cannot easily listen to or modify the communication. SRTP is commonly used when secure voice or video communication is required. TLS serves a different purpose by protecting signaling or other application-layer communication, while SIP handles session signaling and LDAP provides directory services. A secure collaboration deployment may use TLS for signaling and SRTP for media, providing protection across both communication planes. Administrators should verify endpoint support, security configuration, certificates, and key-management mechanisms when troubleshooting secure media.

Question 367

Which CUCM configuration can provide common settings for a group of phones located at the same site?

1. Route Pattern
2. Partition
3. Device Pool
4. CSS

Correct Answer: 3

Explanation

A device pool provides common configuration settings to a group of Cisco collaboration endpoints. Depending on the deployment, a device pool can define the CUCM group, region, date/time group, SRST reference, and other common parameters. This simplifies administration because multiple devices can inherit the same configuration instead of being individually configured. Route patterns are used for digit-based call routing, partitions organize dial-plan objects, and CSSs determine which partitions are accessible. Device pools are especially useful in multi-site environments where phones at different locations require different call-processing servers, regional codec settings, time zones, or survivability configurations.

Question 368

Which component is deployed at the enterprise edge to support Cisco Mobile and Remote Access?

1. Expressway-E
2. Expressway-C
3. CUCM
4. Unity Connection

Correct Answer: 1

Explanation

Expressway-E is normally deployed at the external network edge in a Cisco Mobile and Remote Access architecture. It works with Expressway-C inside the enterprise network to provide secure traversal for supported collaboration clients connecting from outside the organization. Expressway-E handles the external-facing portion of the architecture, while Expressway-C communicates with internal collaboration services. CUCM remains responsible for call control, and Unity Connection provides voicemail. Successful MRA operation requires correct DNS records, certificates, traversal configuration, authentication, and firewall policies. Proper placement and configuration of Expressway-E are therefore important for secure remote collaboration access.

Question 369

Which SIP response indicates successful processing of a request such as an accepted INVITE?

1. 486 Busy Here
2. 404 Not Found
3. 503 Service Unavailable
4. 200 OK

Correct Answer: 4

Explanation

A SIP 200 OK response indicates successful processing of a request. When an INVITE is accepted, the receiving endpoint normally returns a 200 OK response containing session information, often through SDP. The originating endpoint then sends an ACK to confirm receipt and complete the call-establishment exchange. A 486 response indicates that the destination is busy, 404 indicates that the requested destination cannot be found, and 503 indicates service unavailability. SIP response codes are valuable troubleshooting indicators because they show how the receiving system handled a request. Engineers can use signaling traces to determine which system generated a response and what happened afterward.

Question 370

Which Cisco collaboration component provides centralized voicemail services?

1. Cisco Unity Connection
2. Cisco CUBE
3. Cisco Expressway-E
4. Cisco IM and Presence

Correct Answer: 1

Explanation

Cisco Unity Connection provides voicemail services and related messaging capabilities in Cisco collaboration deployments. It integrates with CUCM so that unanswered, busy, or forwarded calls can be directed to appropriate mailboxes. Unity Connection can provide personal greetings, voicemail access, message management, call handlers, and automated-attendant functionality depending on the configuration. CUBE provides SIP border and interoperability functions, Expressway-E supports edge connectivity and MRA architectures, and IM and Presence provides messaging and presence services. When troubleshooting voicemail, administrators should check CUCM integration, voicemail ports, call-routing configuration, Unity Connection service status, and network connectivity between the relevant systems.

Question 371

Which CUCM configuration controls codec preferences between groups of endpoints?

1. Region
2. Partition
3. Route Group
4. CSS

Correct Answer: 1

Explanation

CUCM regions control codec selection and bandwidth relationships between groups of devices. Administrators can configure codec preferences for calls within the same region and between different regions. This allows organizations to manage bandwidth consumption, especially when collaboration traffic crosses WAN links with limited capacity. For example, a deployment can use a higher-bandwidth codec for local calls while selecting a more efficient codec between remote sites. Partitions and CSSs control dial-plan access, while route groups organize gateways and trunks. Region configuration therefore plays an important role in controlling voice and video bandwidth and ensuring that codec selection aligns with the capabilities of the network.

Question 372

Which service allows CUCM to obtain centralized user information from an enterprise directory?

1. RTP
2. LDAP
3. SRTP
4. NTP

Correct Answer: 2

Explanation

LDAP, or Lightweight Directory Access Protocol, allows collaboration systems to communicate with supported enterprise directory services. CUCM can use LDAP integration to synchronize user information from systems such as Microsoft Active Directory. Depending on the deployment, synchronized information may include names, usernames, telephone numbers, and other directory attributes. Centralized directory integration can reduce duplicate user administration and provide consistent identity information across collaboration systems. RTP carries media, SRTP secures media, and NTP synchronizes system clocks. When troubleshooting LDAP synchronization, administrators should check directory connectivity, credentials, search bases, attribute mappings, synchronization settings, and the availability of the directory service.

Question 373

Which CUCM component determines which media resources are available to a device?

1. Route Pattern
2. Partition
3. Media Resource Group List
4. Route Group

Correct Answer: 3

Explanation

A Media Resource Group List, or MRGL, determines which media resource groups and associated resources are available to a device or group of devices. The resources can include conference bridges, transcoders, annunciators, and other supported media services. Administrators can create different MRGLs to control resource access based on location, device type, or operational requirements. Route patterns handle digit-based routing, partitions organize dial-plan objects, and route groups contain gateways or trunks. If a phone cannot access a required conference bridge or transcoder, checking the device’s MRGL is an important troubleshooting step. The referenced media resources must also be operational and properly configured.

Question 374

Which SIP method is used to register an endpoint’s current contact information?

1. INVITE
2. REGISTER
3. BYE
4. CANCEL

Correct Answer: 2

Explanation

The SIP REGISTER method allows an endpoint to provide its current contact information to a SIP registrar. This allows the SIP infrastructure to determine where requests for that user or endpoint should be delivered. Registration information normally includes a contact address and an expiration period. REGISTER is different from INVITE, which establishes or modifies a session, BYE, which terminates an established session, and CANCEL, which stops a pending request. When investigating registration failures, administrators should examine authentication, network connectivity, DNS, certificates where secure signaling is used, and the configuration and availability of the relevant SIP registrar or call-control system.

Question 375

Which Cisco technology provides basic telephony survivability during loss of WAN connectivity to CUCM?

1. CUBE
2. Expressway-E
3. SRST
4. Unity Connection

Correct Answer: 3

Explanation

Survivable Remote Site Telephony, or SRST, provides limited call-processing functionality at a remote site when IP phones lose connectivity with their primary CUCM servers. A supported router can allow phones to register locally and maintain basic calling capabilities until the WAN connection is restored. SRST is particularly useful for branch offices where voice communication must remain available during temporary WAN failures. CUBE provides SIP border and interoperability functions, Expressway-E supports edge collaboration services, and Unity Connection provides voicemail. Administrators should configure the SRST reference appropriately in CUCM and ensure that the branch router, phones, and network meet the requirements for survivable operation.

Question 376

Which SIP response indicates that the requested destination cannot be found?

1. 200 OK
2. 486 Busy Here
3. 503 Service Unavailable
4. 404 Not Found

Correct Answer: 4

Explanation

SIP response code 404 Not Found indicates that the requested destination could not be located by the system handling the request. In Cisco collaboration environments, a 404 may occur when the destination user, number, or routing information is not available in the relevant SIP infrastructure. Troubleshooting should include checking the dialed digits, route patterns, SIP routing, registrations, and DNS information where applicable. A 200 response indicates successful processing, 486 indicates that the destination is busy, and 503 indicates service unavailability. Correctly interpreting SIP response codes helps administrators distinguish destination-routing problems from temporary service failures or endpoint conditions.

Question 377

Which Cisco collaboration media resource converts one audio codec into another?

1. Annunciator
2. Conference Bridge
3. Transcoder
4. Music on Hold

Correct Answer: 3

Explanation

A transcoder converts media between different codecs when two endpoints cannot directly communicate using a common codec. This can be necessary when one side of a call uses G.711 while another requires G.729 or another supported codec. CUCM can invoke a configured transcoder when codec compatibility requirements make direct media communication impossible. A conference bridge supports multi-party conferencing, an annunciator provides prerecorded audio prompts, and Music on Hold supplies audio to callers placed on hold. Transcoding consumes processing resources, so administrators should consider call volume, codec requirements, and resource placement when designing the media-resource architecture of a Cisco collaboration deployment.

Question 378

Which CUCM object provides a logical collection of gateways or trunks for call routing?

1. Route Group
2. Device Pool
3. Region
4. Partition

Correct Answer: 1

Explanation

A route group provides a logical collection of gateways or trunks that CUCM can use when routing calls. Administrators can place multiple routing resources into a route group to provide redundancy or distribute calls according to the configured selection method. Route groups are commonly referenced by route lists, while route patterns determine which destination pattern should be routed. Device pools provide common endpoint settings, regions control codec and bandwidth relationships, and partitions organize dial-plan objects. When external routing problems occur, administrators should verify the route pattern, route list, route group, and the operational status of the gateways or trunks included in the routing path.

Question 379

Which protocol carries real-time voice packets between endpoints?

1. RTP
2. LDAP
3. DNS
4. NTP

Correct Answer: 1

Explanation

Real-time Transport Protocol, or RTP, carries real-time audio and video packets between collaboration endpoints. RTP provides sequence numbers and timestamps that help receivers manage packet ordering and media timing. It is commonly used after SIP or another signaling mechanism establishes the communication session. RTP does not normally provide encryption by itself, which is why secure deployments may use SRTP instead. LDAP provides directory access, DNS performs name resolution, and NTP synchronizes system clocks. When users experience one-way audio, jitter, packet loss, or excessive delay, engineers should examine the RTP media path as well as network quality and any firewalls or NAT devices between the endpoints.

Question 380

Which protocol is commonly used to secure SIP signaling between supported collaboration systems?

1. DHCP
2. RTP
3. TLS
4. LDAP

Correct Answer: 3

Explanation

Transport Layer Security, or TLS, is commonly used to secure SIP signaling between supported collaboration systems and endpoints. TLS provides encryption and integrity protection for signaling traffic and can use digital certificates to establish trust between participating systems. This protects call-control information while it travels across the network. RTP is responsible for media transport, DHCP provides network configuration, and LDAP provides directory services. In secure Cisco collaboration deployments, TLS and SRTP may be used together, with TLS protecting signaling and SRTP protecting audio or video media. Administrators should verify certificate trust, supported TLS versions, and consistent security configuration when troubleshooting secure signaling.