Cisco CCNP Collaboration 350-801 Questions & Answers

• Question 251:

  An engineer is configuring IP telephony. The network relies on DHCP to provide TFTP server addresses to the endpoints. Policy requires the endpoints to receive two server addresses. Which DHCP option must be configured?

  A. 66

  B. 143

  C. 150

  D. 166

  Correct Answer: C

  Option 66 provides a single TFTP server address. Option 150 provides a list of TFTP server addresses. Also if both are configured, Cisco phones will target 150 by default before 66.

• Question 252:

  Which DTMF relay method configured on a SIP dial-peer will ensure that a media resource is not invoked by Unified CM for calls to UCCX IVRs?

  A. dtmf-relay sip-kpml

  B. dtmf-relay rtp-nte

  C. sdtmf-relay h245-slgnal

  D. dtmf-relay sip-notify

  Correct Answer: A

  UCCX only supports out-of-band DTMF. This can be applied at the CUBE to avoid a media resource being needed to address as it can directly handle the DTMF relay from RTP-NTE to SIP-KPML https://www.cisco.com/c/dam/en/us/td/docs/ios-xml/ios/voice/cube_uccx/cube_uccx_interop_bestprac_guide.pdf

• Question 253:

  Which task is required when configuring self-provisioning for an end user in Cisco UCM?

  A. Enable Auto-Registration.

  B. Associate the end user to the Standard CCM Super Users group.

  C. Associate the end user to a SIP Profile.

  D. Disable Auto-Registration.

  Correct Answer: A

  This auto registration must be enabled for the self-provisioning to work due to needing the phone able to register to CUCM first.

  Reference:

  https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/214233-configure-self- provisioning-feature-on-c.html

• Question 254:

  A user reports that when receiving an inbound call on their IP Phone from the PSTN they are unable to transfer this call to another PSTN number. What is the reason for this failures?

  A. The IP phone is configured with the wrong region.

  B. The incoming calling search space of the SIP trunk does not include the partition of the line in the IP phone.

  C. The service parameter related to Offnet to Offnet Call Transfer is set to TRUE.

  D. The gateway is configured with the wrong device pool.

  Correct Answer: C

• Question 255:

  How is bandwidth allocated to traffic flows in a flow-based WFQ solution?

  A. Each type of traffic flow has equal bandwidth.

  B. Bandwidth is divided among traffic flows. Voice has priority.

  C. Voice has priority and the other types of traffic share the remaining bandwidth

  D. All the bandwidth is divided based on the QoS marking of the packets

  Correct Answer: A

• Question 256:

  What is the validity period of the ITL Recovery certificate in Cisco UCM?

  A. 1 year

  B. 20 years

  C. 5 years

  D. 10 years

  Correct Answer: B

  The validity of ITLRecovery has been extended from 5 years to 20 years to ensure that the ITLRecovery certificate remains same for a longer period

  Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/12_0_1/secugd/cucm_b_cucm-security-guide-1201/cucm_b_cucm-security-guide-1201_chapter_011.html

• Question 257:

  When setting a new primary DNS server in the Cisco UCM CLI what is required for the change to take affect?

  A. restart of CallManager service

  B. restart of DirSync service

  C. restart of the network service

  D. restart of TFTP service

  Correct Answer: C

  You don't have to restart the call manager service. Actually according to this guide (read at the bottom) you don't have to restart anything, it restarts network services for you. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1SU1/adminGd/cucm_b_administration-guide-1251SU1/cucm_b_test-adminguide_chapter_011110.html

• Question 258:

  What happens to voice packets from a Cisco 8845 IP phone in the QoS trust boundary?

  A. The voice packets are not trusted, and the access layer switch reclassifies the packets.

  B. The voice packets are classified by the phone, and the classification is accepted.

  C. The phone and access layer switch negotiate the classification of packets.

  D. Cisco UCM determines how the voice packets are classified.

  Correct Answer: B

  Reference: https://www.ccexpert.us/qos-implementing/qos-trust-boundary-in-the-lan-classify-and-mark-where.html

• Question 259:

  A company deploys centralized cisco ucm architecture for a hub location and two remote sites.

  1.

  The company has only one ITSP connection at the hub connection, and ITSP supports only G.711 calls

  2.

  Remote site A has a 1-Gbps fiber connection to the hub connection and calls to and from remote side A use G.711 codec

  3.

  Remote site B has a 1 T1 connection to the hub location and calls to and from remote site B use G.729 codec Based on the provided guidance, a Cisco voice engineer must design media resource management for the customer.

  What is the method that needs to be followed?

  A. configure the hardware transcoder on the site B router.

  B. configure the hardware transcoder on the site A router.

  C. configure the hardware transcoder on the hub location router.

  D. configure the software transcoder on Cisco UCM to support voice calls to and from both remote sites.

  Correct Answer: C

  Site B has a T1 connection and we don't want to force them to limit the number of calls. As an administrator, i would take the incoming calls from site B in G729 and do a transcode at the hub location, and receive an Incoming call to Site B in G 711 and transcode it to G729 and traverse over T1. Win Win situation.

• Question 260:

  A Cisco IP Phone 7841 that is registered to a Cisco Unified Communications Manager with default configuration receives a call setup message. Which codec is negotiated when the SDP offer includes this line of text?

  M=audio 498181 RTP/AVP 0 8 97

  A. G.711ulaw

  B. iLBC

  C. G.711alaw

  D. G.722

  Correct Answer: A

  Those are the codecs.

  They are RTP payload types, and in preference order.

  Eg 8=g711alaw, 0=g711ulaw, 18=g729, 97=this one is special, it's actually what they want to Mark RTP-NTP (RFC2833) DTMF relay as.

  Reference:

  https://community.cisco.com/t5/ip-telephony-and-phones/sip-sdp-no-codec-specifed/td-p/3913990 https://en.m.wikipedia.org/wiki/RTP_payload_formats