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300-820 Exam Questions - Online Test


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NEW QUESTION 1
Which two licenses are required for the B2B feature to work? (Choose two.)

  • A. Traversal Server
  • B. TURN Relays
  • C. Rich Media Sessions
  • D. Advanced Networking
  • E. Device Provisioning

Answer: CE

NEW QUESTION 2
Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one major complication in implementing NAT ALG for voice and video devices?

  • A. Internal endpoints cannot use addresses from the private address space.
  • B. The NAT ALG cannot inspect the contents of encrypted signaling messages.
  • C. NAT ALG introduces jitter in the voice path.
  • D. Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.

Answer: B

NEW QUESTION 3
Which mode should be used when Call Policy is configured on Expressways?

  • A. extended CPL
  • B. local CPL, policy service, and off
  • C. on
  • D. remote CPL

Answer: C

NEW QUESTION 4
300-820 dumps exhibit
Refer to the exhibit. An Expressway-C and Expressway-E are configured for B2B calling and the Expressway-E zone is set to TLS Verify Currently, calls do not reach the Expressway-C. The Traversal Client zone on the Expressway-C for B2B reports the information in the exhibit for the Peer 1 address.
Which action resolves this error?

  • A. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
  • B. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
  • C. Add a server certificate to the Expressway-C that is signed by a certificate authority.
  • D. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.

Answer: D

NEW QUESTION 5
When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

  • A. SDP b-line
  • B. SIP record route
  • C. SDP c-line
  • D. SDP m-line

Answer: C

NEW QUESTION 6
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.

Answer: D

NEW QUESTION 7
300-820 dumps exhibit
Refer to the exhibit. Which two numbers match the regular expression? (Choose two.)

  • A. d20d16d20d22
  • B. 2091652010224
  • C. 209165200225
  • D. d209d165d200d224
  • E. 209165200224

Answer: CE

NEW QUESTION 8
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 los
  • D. This technology is available only from Cisco Unified CM version 11.5 and later.
  • E. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.

Answer: B

NEW QUESTION 9
Which two statements about Expressway media traversal are true? (Choose two.)

  • A. Expressway Control is the traversal server installed in the DMZ.
  • B. The Expressway Edge must be put in a firewall DMZ segment.
  • C. Cisco Unified Communications Manager zone can be either traversal server or client.
  • D. The Unified Communications traversal zone can be used for Mobile and Remote Access.
  • E. Both Expressway Edge interfaces can be NATed.

Answer: BD

NEW QUESTION 10
300-820 dumps exhibit
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

Answer: B

NEW QUESTION 11
What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)

  • A. The MRA license is missing on the Expressway-E.
  • B. The Unified Communications zone is down.
  • C. Transform is not configured on Expressway-E.
  • D. The SRV record for _cisco-uds is misconfigured.
  • E. The firewall is blocking the port.

Answer: DE

NEW QUESTION 12
In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

  • A. Cisco Expressway-E and endpoints outside the enterprise
  • B. Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P
  • C. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager
  • D. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise

Answer: A

NEW QUESTION 13
Refer to the exhibit. While troubleshooting Cisco Jabber login issues, there are some error messages. Why is the Jabber client unable to sign in?

  • A. down Cisco Unified Communications Manager server
  • B. XMPP bind failures
  • C. incorrect login credentials
  • D. service discovery issues

Answer: B

NEW QUESTION 14
An administrator has been asked to configure Video Mesh signaling traffic to route through a proxy.
Which is an available proxy type in the Video Mesh node configuration to support this deployment model?

  • A. Transparent Explicit Proxy
  • B. Transparent Inspecting Proxy
  • C. Reverse Proxy
  • D. Distorting Proxy

Answer: B

NEW QUESTION 15
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.

Answer: B

NEW QUESTION 16
Where are voice calls handled in a Cisco Jabber hybrid cloud-based deployment with Cisco Webex Platform Service?

  • A. Voice calls use Webex Calling platform for call control and use hybrid media nodes for local conferencing.
  • B. Voice calls use local media nodes to keep traffic internal for internal traffic and use Webex Calling for external calls.
  • C. Voice call use Cisco Unified Communications Manager for local calls and Webex Calling for external calls.
  • D. Voice calls use local Cisco Unified Communications Manager for all calls.

Answer: D

NEW QUESTION 17
Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

  • A. _collab-edge on port 8443
  • B. _cisco-uds-edge on port 5061
  • C. _collab-edge on port 5061
  • D. _cisco-uds on port 8443

Answer: A

NEW QUESTION 18
A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.
Which statement is true?

  • A. Webex Cloud supports either a DMZ-based Mesh Node for security or an internal-based Mesh Node for media control only.
  • B. Installing a Video Mesh Node in the DMZ requires you to open TCP and UDP port 4444 in your internal firewall for full clustering functionality.
  • C. Installing a Video Mesh Node in the DMZ requires the external firewall to allow UDP traffic from ANY port to the address of the Video Mesh Nodes via port 5004.
  • D. Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams client
  • E. A DMZ node is added for extra security.

Answer: C

NEW QUESTION 19
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.

Answer: A

NEW QUESTION 20
For a Mobile and Remote Access deployment, which server's certificate must include the Unified registration domain as a Subject Alternate Name?

  • A. Expressway-C server certificate
  • B. Cisco Unified Communications Manager server certificate
  • C. Expressway-E server certificate
  • D. Expressway-C and Expressway-E server certificate

Answer: C

NEW QUESTION 21
When configuring a Cisco Expressway solution and need to design the dial plan with various rules for URIs and numbers coming through the device. To do so, it is important that some dial plan rules are applied in a certain order. When configuring the transform section, you must know the range of the priorities.
Which range is correct?

  • A. any number in the drop-down menu
  • B. any number in the dialog box
  • C. any number between 1-128
  • D. any number between 1-65534

Answer: D

NEW QUESTION 22
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.<domain>
  • B. _cisco-mra._tls.<domain>
  • C. _collab-edge._tls.<domain>
  • D. _cisco-expwy._tls.<domain>

Answer: A

NEW QUESTION 23
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