Cisco CCNP Collaboration 300-820 Questions & Answers

• Question 111:

  A company has enabled ICE to optimize call flows and improve video quality between their Cisco Collaboration endpoints internally and externally. For which reason would you see activity on the TURN server when a call is established between two external endpoints?

  A. The video call is using encryption, which is not supported by ICE with CUCM 12.5

  B. ICE cannot reduce the packet loss on the link

  C. A STUN cannot punch holes in the firewall

  D. The video call is using 4K resolution, which is not supported by ICE with CUCM 12.5

  Correct Answer: C

  "Those addresses (A, B, and C) populate the SIP SDP offer and answer as ICE candidates, and after the signaling has gone through, both endpoints will have the remote party ICE candidate addresses. It is at that point that the endpoints do a connectivity check by sending STUN messages to one another in an attempt to punch transport holes in the firewalls in order to establish media connectivity between peers."

  https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html

• Question 112:

  Refer to the exhibit.

  

  A new neighbor zone is added for a new Cisco Meeting Server, but the zone is showing a SIP status of failed from the time the zone it was created. What should be done to resolve this issue?

  A. The search rule must be changed to continue on match

  B. The existing zone using ID 7 must be deleted

  C. More bandwidth must be added to the appropriate pipes

  D. The underlying DNS issue must be resolved

  Correct Answer: D

  At the end it says "Could not resolve hostname"

• Question 113:

  Which connection does the traversal zone configuration define?

  A. Expressway-E and Collaboration Endpoints

  B. Cisco UC and Cisco Unified Presence Server

  C. Cisco Expressway-C and Cisco Expressway-E platforms

  D. Cisco UCS E-Series and Cisco UCM

  Correct Answer: C

  Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-11/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X8-11-4.pdf

• Question 114:

  Refer to the exhibit.

  

  When a Jabber user attempts to connect from outside of the organization, the user enters the login information as "[email protected]" and receives the error "Cannot find your services Automatically". The engineer tries to resolve SRV

  records used by Jabber.

  DNS A record "expressway-e.example.com" points to the Expressway-E IP and "cucm.example.com" points to the Cisco Unified Communications Manager.

  Which change resolves the DNS problem?

  A. Change cisco-uds to point to the Expressway-E FQDN.

  B. Change the collab-edge record to point to 5061.

  C. Remove the cisco-uds SRV record for the external DNS.

  D. Change the priority of the SRV record for cisco-uds.

  Correct Answer: C

• Question 115:

  Which entry in the public (external) DNS is valid to configure DNS SRV records for a Cisco Mobile and Remote Access solution?

  A. _cisco-uds._tcp.

  B. _cisco-mra._tls.

  C. _collab-edge._tls.

  D. _cisco-expwy._tls.

  Correct Answer: C

• Question 116:

  A Jabber user is being prompted to trust the Expressway-E certificate when using Mobile and Remote Access. The administrator has validated that the Expressway-E certificate is being trusted by the machine running the Jabber client. What else can be done to solve this problem?

  A. Create a new CSR with new information on the SAN field.

  B. Include Cisco Unified Communications Manager registration domain in the Expressway-E certificate as a SAN.

  C. Change the domain name.

  D. Change the FQDN of the Expressway.

  Correct Answer: B

• Question 117:

  Refer to the exhibit.

  

  Cisco Unified Communications Manager routes the call via the Webex Meetings route list and route group to the Video Mesh cluster Node#1 in the Video Mesh cluster is hosting the meeting and has reached full capacity, but other nodes in the cluster still have spare capacity.

  What happens to the participant's call?

  A. Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.

  B. The call is queued.

  C. The call fails.

  D. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.

  Correct Answer: A

• Question 118:

  Which two considerations must be made when using Expressway media traversal? (Choose two.)

  A. It is possible to NAT both Expressway-E interfaces

  B. The Unified Communications traversal zone should be used for MRA

  C. The Expressway-E must be put in a firewall DMZ segment

  D. Expressway Control is the traversal server installed in the DMZ

  E. Cisco UCM zone should be either traversal server or client

  Correct Answer: BC

  Reference: https://www.ciscolive.com/c/dam/r/ciscolive/apjc/docs/2018/pdf/BRKUCC-2801.pdf

• Question 119:

  What is one of the user-related prerequisites for Jabber Team Messaging Mode Installation?

  A. Create user accounts in Cisco Webex Control Hub only.

  B. Create user accounts in Cisco Unified Communications Manager only.

  C. Create user accounts in Cisco Unified IM and Presence.

  D. Create user accounts in Cisco Unified CM and Cisco Webex Control Hub.

  Correct Answer: D

• Question 120:

  An Expressway-E is configured using a single NIC with NAT.

  How must the Expressway-C traversal client zone be configured to connect to the Expressway-E?

  A. TLS verify must be enabled.

  B. The zone profile must be set to default.

  C. The peer address must be the Expressway-E NAT address.

  D. The peer address must be the Expressway-E LAN 1 IP address.

  Correct Answer: C