Cisco CCNP Collaboration 300-820 Questions & Answers

• Question 51:

  When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?

  A. transforms, CPL, user policy, search rules

  B. search rules, zones, local zones

  C. DNS zone, local zone, search rules

  D. search rules, transforms

  Correct Answer: A

• Question 52:

  When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

  A. Webex CUSP Cluster Name

  B. Expressway-E Cluster Name

  C. Cisco Unified Communications Manager Publisher FQDN

  D. Expressway-C Cluster Name

  Correct Answer: D

• Question 53:

  With QoS enabled, which two statements about the Cisco Webex Video Mesh Node signaling and media traffic are true? (Choose two.)

  A. From VMN to CUCM SIP endpoints, the source UDP ports from 52500 to 62999 is used for audio traffic.

  B. From VMN to Webex Teams clients, the source UDP port 5004 is used for video traffic.

  C. From Webex cloud to VMN, the source UDP port 9000 is used for audio traffic.

  D. From VMN to video endpoints, the destination UDP port 5004 is used for audio traffic.

  E. From VMN to Webex cloud, the destination UDP port 9000 is used for video traffic.

  Correct Answer: AB

• Question 54:

  What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

  A. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.

  B. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.

  C. ICE uses FAST updates to optimize the video quality in case of packet loss. This technology is available only from Cisco Unified CM version 11.5 and later.

  D. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.

  Correct Answer: B

  The following ICE-capable endpoints can send media directly to each other when they are MRA-registered and ICE passthrough is enabled https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html

• Question 55:

  Refer to the exhibit.

  

  If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is busy, which media node does the Webex Teams device connect to next?

  A. Both Cloud Node US-EAST and US-WEST

  B. Video Mesh Cluster-2 C. Cloud Node US-EAST

  D. Cloud Node US-WEST

  Correct Answer: B

• Question 56:

  Which two licenses are required for the Expressway B2B feature to work? (Choose two)

  A. Traversal Server

  B. Advanced Networking

  C. Device Provisioning

  D. Rich Media Sessions

  E. TURN Relays

  Correct Answer: AD

• Question 57:

  When a Cisco Webex Video Mesh Node is configured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?

  A. the lowest STUN round-trip delay to each node and cloud

  B. a reachable Video Mesh Node and then overflows to the cloud, if needed

  C. the SIP delay header during call setup

  D. an HTTPS speed and latency test to each node and the cloud

  Correct Answer: B

  Reference: https://www.cisco.com/c/en/us/solutions/collateral/unified-communications/spark-hybrid-services/datasheet-c78-738153.html

• Question 58:

  Which role does Call Policy play when preventing toll fraud on Expressways?

  A. It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.

  B. It changes the calling and called number on a call.

  C. It changes the audio protocol used by a call through Expressways.

  D. It changes the audio codec used in a call through Expressways.

  Correct Answer: A

• Question 59:

  What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?

  A. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.

  B. Encrypted IP traffic for collaboration devices always is trusted by the firewall.

  C. The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.

  D. The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

  Correct Answer: C

• Question 60:

  Which zone is required on a B2B deployment between Expressway-C and Expressway-E?

  A. traversal zone

  B. DNS zone

  C. default zone

  D. neighbor zone

  Correct Answer: A