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

 

Question 341

Which CUCM component determines which partitions a user or device can search when placing a call?

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

Correct Answer: 4

Explanation

A Calling Search Space, commonly called CSS, determines which partitions are accessible to a calling device, directory number, or other calling entity. CUCM uses the CSS together with partitions to control which destinations can be reached. Administrators can create different CSS configurations for users with different calling privileges. For example, one CSS may allow only internal and local calls, while another may also provide access to international routes. Device pools provide common device settings, regions control codec and bandwidth relationships, and route groups contain gateways or trunks. Proper CSS and partition design is therefore essential for implementing controlled and predictable CUCM dialing behavior.

Question 342

Which CUCM configuration can change a dialed number before the call is routed?

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

Correct Answer: 1

Explanation

A translation pattern allows CUCM to manipulate dialed digits before continuing with call processing. Depending on its configuration, digits can be added, removed, or transformed into another format. This is useful when adapting internal numbers to external numbering plans or normalizing numbers between different systems. Translation patterns can also be configured with calling and called party transformations. Device pools provide common endpoint settings, regions influence codec selection and bandwidth, and media resource groups organize media resources. Translation patterns are therefore an important tool when implementing flexible dial plans that need to accommodate different numbering formats or routing requirements.

Question 343

Which SIP response code indicates that the destination is temporarily unavailable because of a service problem?

1. 200
2. 404
3. 503
4. 486

Correct Answer: 3

Explanation

SIP response code 503 Service Unavailable indicates that the server or service handling the request is temporarily unable to process it. In a collaboration environment, this may result from an unavailable service, overloaded system, maintenance condition, or another temporary infrastructure problem. Troubleshooting a 503 response may involve checking SIP trunks, gateways, service status, routing configuration, and network connectivity. A 200 response indicates successful processing, 404 means the requested destination could not be found, and 486 generally indicates that the called endpoint is busy. Correct interpretation of SIP response codes helps engineers quickly narrow down call-signaling problems.

Question 344

Which Cisco collaboration component is responsible for providing voicemail and automated-attendant functionality?

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

Correct Answer: 2

Explanation

Cisco Unity Connection provides voicemail and automated-attendant capabilities in Cisco collaboration environments. It can integrate with CUCM to receive calls redirected to voicemail and provide users with mailbox access and message-management functions. Unity Connection can also support greetings, call handlers, and other messaging-related features depending on the deployment. CUBE provides SIP and voice border functionality, Expressway-C supports internal traversal and collaboration edge architectures, and IM and Presence provides messaging and presence services. During troubleshooting, administrators should verify integration between CUCM and Unity Connection, voicemail ports, call-routing configuration, and network connectivity.

Question 345

Which CUCM configuration provides common settings to a group of IP phones at a particular site?

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

Correct Answer: 1

Explanation

A device pool allows administrators to assign common configuration parameters to a group of Cisco IP phones and other supported endpoints. Settings can include the CUCM group, region, date/time group, SRST reference, and other operational parameters. Device pools simplify administration because common settings do not need to be individually configured on every endpoint. Route patterns are used for digit-based routing, partitions organize dial-plan objects, and CSSs control access to partitions. In multi-site collaboration deployments, device pools are particularly useful because phones at different locations may require different CUCM groups, regions, or survivability settings.

Question 346

Which protocol is responsible for carrying the actual audio packets during a typical IP voice call?

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

Correct Answer: 2

Explanation

Real-time Transport Protocol, or RTP, carries the actual audio and video media packets during many IP collaboration sessions. SIP normally handles signaling, including call establishment, modification, and termination, while RTP carries the media after the session has been established. RTP uses sequence numbers and timestamps to help receivers manage packet ordering and timing. Media quality can be affected by packet loss, delay, jitter, and congestion. SIP, LDAP, and DNS perform different functions and do not normally carry the actual voice stream. Understanding this separation is important when troubleshooting situations where call signaling succeeds but users experience one-way audio or poor media quality.

Question 347

Which CUCM component organizes gateways and trunks that can be used for call routing?

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

Correct Answer: 1

Explanation

A CUCM route group contains gateways or trunks that can be selected for outbound call routing. It provides a logical grouping of possible routing resources and can support redundancy by allowing multiple gateways or trunks to participate in call routing. Route groups are commonly referenced by route lists, which are then selected by route patterns. Regions control codec and bandwidth relationships, device pools provide common endpoint settings, and partitions organize dial-plan objects. When troubleshooting outbound calls, administrators should inspect the route pattern, route list, route group, and gateway or trunk status to determine whether CUCM has a valid and available path toward the destination.

Question 348

Which component is normally deployed at the external network edge in an Expressway MRA architecture?

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

Correct Answer: 3

Explanation

Expressway-E is normally deployed at the external network edge in a Cisco Mobile and Remote Access architecture. It communicates with Expressway-C through a secure traversal relationship and allows supported collaboration clients to reach internal collaboration services without requiring a traditional VPN. Expressway-E is exposed toward the external network, while Expressway-C is located inside the enterprise environment. CUCM provides call control and Unity Connection provides voicemail. Successful MRA operation requires correct DNS discovery, certificates, traversal configuration, authentication, and appropriate collaboration service integration. Edge security and firewall policies must also permit the required traffic.

Question 349

Which SIP message is sent to confirm receipt of a final response to an INVITE transaction?

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

Correct Answer: 2

Explanation

The SIP ACK method is used to acknowledge the final response to an INVITE transaction. In a successful call setup, the called endpoint returns a 200 OK response and the originating endpoint sends an ACK to confirm receipt. This completes the INVITE transaction and allows the established media session to continue. BYE terminates an established call, REGISTER associates an endpoint with a SIP registrar, and CANCEL terminates a pending request before the final response is received. Understanding the relationship between INVITE, provisional responses, 200 OK, ACK, and BYE is important when analyzing SIP traces and diagnosing call-establishment problems.

Question 350

Which protocol is used to provide secure signaling for SIP communications?

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

Correct Answer: 4

Explanation

TLS can be used to secure SIP signaling between supported collaboration systems and endpoints. When SIP signaling is protected with TLS, the communication channel can provide encryption and integrity protection for call-control messages. Certificates are commonly used to establish trust between participating systems. SRTP protects the media stream rather than the signaling channel, RTP carries media without providing the same security features, and DHCP provides network configuration. In a secure Cisco collaboration deployment, administrators may use TLS for signaling and SRTP for media, creating separate security mechanisms for the control and media planes. Certificate and trust configuration are important parts of secure SIP troubleshooting.

Question 351

Which CUCM object determines the gateways or trunks used after a route pattern selects a routing destination?

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

Correct Answer: 1

Explanation

A route list provides a logical collection of route groups that CUCM can use after a route pattern selects the route list as its destination. The route list can contain multiple route groups and provide ordered or alternative routing paths. Each route group can contain gateways or trunks that connect CUCM to external networks. This layered design separates digit matching from the actual routing resources and makes large dial plans easier to manage. Partitions control visibility, device pools provide common endpoint settings, and regions control codec and bandwidth relationships. Route lists are especially useful when organizations require redundant external gateways or trunks.

Question 352

Which CUCM feature controls the codec and bandwidth relationship between two regions?

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

Correct Answer: 2

Explanation

CUCM regions define codec preferences and bandwidth relationships between groups of devices. Administrators can configure the codec used for calls within or between regions and control the amount of bandwidth that voice or video calls may consume. This is especially useful in distributed organizations where WAN links have limited capacity. For example, a deployment may permit a higher-bandwidth codec for local calls but use a more bandwidth-efficient codec between remote sites. Partitions and CSSs control dial-plan access, while route groups manage gateways and trunks. Correct region configuration helps maintain media quality while preventing collaboration traffic from unnecessarily consuming limited network bandwidth.

Question 353

Which protocol is commonly used by Cisco IP phones to obtain their initial network configuration?

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

Correct Answer: 3

Explanation

Cisco IP phones commonly use DHCP to obtain their initial network configuration. DHCP can provide the phone with an IP address, subnet mask, default gateway, DNS information, and other parameters needed for network operation. Depending on the deployment, DHCP options can also identify the TFTP server used by the phone to obtain configuration files. SIP is used for signaling in supported deployments, while SRTP protects media and TLS can protect signaling. Proper DHCP configuration is therefore important during phone deployment. If phones fail to obtain addresses or discover required services, administrators should inspect DHCP scopes, options, VLAN configuration, and network connectivity.

Question 354

What is the main function of a CUCM Media Resource Group List?

1. To assign IP addresses
2. To define which media resources are available to devices
3. To determine LDAP search bases
4. To select DNS servers

Correct Answer: 2

Explanation

A Media Resource Group List, or MRGL, determines which configured media resources are available to a device or group of devices. MRGLs reference Media Resource Groups, which may contain conference bridges, transcoders, annunciators, and other supported resources. This provides administrators with control over which resources endpoints can access and can help direct media-resource usage based on location or operational requirements. MRGLs are unrelated to IP addressing, LDAP searches, or DNS server selection. When a device cannot access a required conference bridge or transcoder, administrators should verify its assigned MRGL and confirm that the referenced media resources are available and correctly configured.

Question 355

Which SIP response indicates that the called party is currently busy?

1. 404
2. 503
3. 200
4. 486

Correct Answer: 4

Explanation

SIP response code 486 Busy Here indicates that the destination endpoint is currently busy and cannot accept the call. Depending on the CUCM or SIP routing configuration, the call may then be forwarded to voicemail, another destination, or handled according to a configured busy treatment. A 404 response indicates that the requested destination could not be found, 503 indicates that a service is unavailable, and 200 indicates successful processing. SIP response codes provide useful diagnostic information because they identify how the receiving system handled a request. Engineers can use these responses in SIP traces to determine whether a call failed because of destination status or another service problem.

Question 356

Which Cisco technology allows a branch router to provide limited telephony services when WAN connectivity to CUCM is unavailable?

1. SRST
2. MRA
3. CUBE
4. LDAP

Correct Answer: 3

Explanation

SRST, or Survivable Remote Site Telephony, allows a supported branch router to provide limited call-processing functionality when phones lose connectivity to their primary CUCM servers. This provides basic voice survivability during WAN outages. Supported phones can register with the SRST router and continue making certain calls until communication with CUCM is restored. MRA provides remote client access, CUBE provides SIP and voice border functions, and LDAP provides directory services. SRST planning should include appropriate configuration on CUCM and the branch router, supported endpoint capabilities, and suitable network connectivity. It is particularly important for remote locations where voice availability must continue during temporary WAN failures.

Question 357

Which Cisco collaboration component can normalize SIP messages between an enterprise and a service provider?

1. Unity Connection
2. CUBE
3. CUCM Group
4. Conference Bridge

Correct Answer: 2

Explanation

Cisco Unified Border Element, or CUBE, can perform SIP normalization and interoperability between an enterprise collaboration environment and external SIP networks. Service providers and enterprise systems may use different SIP behaviors, headers, codecs, or signaling requirements. CUBE can modify and normalize signaling so that the two sides can interoperate more reliably. It can also provide functions such as topology hiding, media handling, and security controls. Unity Connection provides voicemail, a CUCM group identifies call-processing servers for endpoint registration, and a conference bridge provides conferencing resources. CUBE is therefore an important component when connecting enterprise collaboration systems to external SIP service providers.

Question 358

Which service provides directory-based user information to Cisco collaboration systems?

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

Correct Answer: 4

Explanation

LDAP provides a standardized method for accessing directory information from systems such as enterprise directory services. Cisco collaboration deployments can use LDAP integration to synchronize or access user information, depending on the architecture and configured features. This can reduce duplicate administration and allow collaboration systems to use centralized identity information. LDAP does not transport voice or video media and does not provide time synchronization. RTP carries real-time media, SRTP protects real-time media, and NTP synchronizes system clocks. When troubleshooting LDAP integration, administrators should check connectivity, authentication, search bases, synchronization configuration, directory attributes, and whether the required directory service is available.

Question 359

Which media resource allows multiple participants to communicate through a shared conference session?

1. Conference Bridge
2. Transcoder
3. Annunciator
4. MTP

Correct Answer: 3

Explanation

A conference bridge provides the media-processing capability required to connect multiple participants into a conference session. It can mix or otherwise process the media streams from several participants so that everyone can communicate within the same conference. CUCM can use configured conference bridge resources based on endpoint requirements and media-resource configuration. A transcoder converts between codecs, an annunciator provides prerecorded audio prompts, and an MTP provides specific media-processing functions such as packetization or signaling-related media termination in supported scenarios. Proper MRGL configuration helps ensure that endpoints can access suitable conference resources when users initiate or join multi-party calls.

Question 360

Which protocol is responsible for resolving hostnames to IP addresses in a collaboration network?

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

Correct Answer: 1

Explanation

DNS, or Domain Name System, resolves hostnames and service names to IP addresses and other records used by network applications. Cisco collaboration systems rely on DNS for various functions, including service discovery, server resolution, SIP routing, and Expressway-related deployments. Accurate forward and reverse DNS configuration can be important for successful communication and certificate validation. NTP synchronizes clocks, RTP transports real-time media, and LDAP provides directory services. When troubleshooting collaboration connectivity, administrators should verify that required DNS records exist, resolve correctly from the appropriate network locations, and return expected addresses. DNS problems can cause failures even when the underlying IP network is otherwise reachable.