[2022] Valid 300-820 test answers & Cisco 300-820 exam pdf
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NEW QUESTION 30
What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)
- A. The firewall is blocking the port.
- B. Transform is not configured on Expressway-E.
- C. The SRV record for _cisco-uds is misconfigured.
- D. The Unified Communications zone is down.
- E. The MRA license is missing on the Expressway-E.
Answer: A,C
NEW QUESTION 31
Refer to the exhibit.
Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
- A. HTTPS: TCP 8443
- B. SIP TCP 5061
- C. XMPP: TCP 7400
- D. SIP: TCP 7001
- E. Media: UDP 36012 to 59999
Answer: C,D
NEW QUESTION 32
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. Add a server certificate to the Expressway-C that is signed by a certificate authority.
- B. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
- C. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
- D. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
Answer: B
NEW QUESTION 33
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. incorrect login credentials
- B. service discovery issues
- C. XMPP bind failures
- D. down Cisco Unified Communications Manager server
Answer: C
Explanation:
Explanation
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-5/Mobile-Remote-Ac
NEW QUESTION 34
What is one of the user-related prerequisites for Jabber Team Messaging Mode Installation?
- A. Create user accounts in Cisco Unified IM and Presence.
- B. Create user accounts in Cisco Unified CM and Cisco Webex Control Hub.
- C. Create user accounts in Cisco Webex Control Hub only.
- D. Create user accounts in Cisco Unified Communications Manager only.
Answer: C
NEW QUESTION 35
Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?
- A. Cisco Webex Meeting Center is always used for meeting capabilities.
- B. Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.
- C. Cisco Unified CM is always used for meeting capabilities.
- D. Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.
Answer: A
NEW QUESTION 36 
Refer to the exhibit. Which two numbers match the regular expression? (Choose two.)
- A. 0
- B. 1
- C. d209d165d200d224
- D. 2
- E. d20d16d20d22
Answer: A,D
NEW QUESTION 37
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
Answer: A
NEW QUESTION 38
Which statement about the Cisco Webex hybrid service is true?
- A. Expressway Connector is required for an on-premises Exchange server.
- B. Directory Connector is required for Azure AD.
- C. Hybrid Message service works only with Jabber cloud deployment.
- D. Directory Connector must be deployed for OBTP to work with on-premises video devices.
Answer: D
NEW QUESTION 39
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. incorrect login credentials
- B. service discovery issues
- C. XMPP bind failures
- D. down Cisco Unified Communications Manager server
Answer: C
NEW QUESTION 40
Which entry in the public (external) DNS is valid to configure DNS SRV records for a Cisco Mobile and Remote Access solution?
- A. _cisco-mra._tls.<domain>
- B. _collab-edge._tls.<domain>
- C. _cisco-uds._tcp.<domain>
- D. _cisco-expwy._tls.<domain>
Answer: C
NEW QUESTION 41
Jabber cannot log in via Mobile and Remote Access. You inspect Expressway-C logs and see this error message:
XCP_JABBERD Detail="Unable to connect to host '%IP%', port 7400:(111) Connection refused" Which is the cause of this issue?
- A. Rich Media Session licenses are not activated on Expressway-E.
- B. The XCP Service is not activated on Expressway-E.
- C. The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C.
- D. Expressway-E is listening on the wrong IP interface.
Answer: D
NEW QUESTION 42
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. Encrypted IP traffic for collaboration devices always is trusted by the firewall.
- B. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
- 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.
Answer: A
NEW QUESTION 43
What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?
- A. AXL service should be activated only on the publisher of each IM and Presence cluster.
- B. You must have the Intercluster Sync Agent working across your IM and Presence clusters.
- C. Your IM and Presence Service clusters must have Multiple Device Messaging disabled.
- D. You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.
Answer: B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/spark/hybridservices/messageservice
NEW QUESTION 44
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. a reachable Video Mesh Node and then overflows to the cloud, if needed
- B. the SIP delay header during call setup
- C. the lowest STUN round-trip delay to each node and cloud
- D. an HTTPS speed and latency test to each node and the cloud
Answer: A
NEW QUESTION 45
What is configured on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?
- A. Application layer gateway is enabled to bridge the media traffic.
- B. A static NAT route is added to the firewall to bridge the two networks.
- C. The Expressway-E is enabled for Dual-NIC capability.
- D. The Expressway-E is enabled for interworking
Answer: C
NEW QUESTION 46
Refer to the exhibit.
In an environment SIP devices are registered to CUCM and H.323 devices to VCS. What would be required to enable these calls to setup correctly?
- A. Create a presearch transform.
- B. Change the interworking mode to On.
- C. Disable SIP in the external zone.
- D. Change the domain of SIP endpoint A to cisco.com.
Answer: B
NEW QUESTION 47
In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?
- A. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager
- B. Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P
- C. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise
- D. Cisco Expressway-E and endpoints outside the enterprise
Answer: B
NEW QUESTION 48
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 and Expressway-E server certificate
- B. Cisco Unified Communications Manager server certificate
- C. Expressway-E server certificate
- D. Expressway-C server certificate
Answer: C
NEW QUESTION 49 
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. Video Mesh Cluster-2
- B. Cloud Node US-WEST
- C. Both Cloud Node US-EAST and US-WEST
- D. Cloud Node US-EAST
Answer: A
NEW QUESTION 50
Refer to the exhibit.
When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?
- A. 13358 is replaced by 135, and then is sent to the local zone.
- B. 13358 is sent directly to the traversal zone.
- C. 13358 is replaced by 135, and then is sent to the traversal zone.
- D. 13358 is replaced by 135 and remains in the same zone.
Answer: C
NEW QUESTION 51
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 and Expressway-E server certificate
- B. Cisco Unified Communications Manager server certificate
- C. C.Expressway-E server certificate
- D. Expressway-C server certificate
Answer: C
NEW QUESTION 52
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. More bandwidth must be added to the appropriate pipes
- B. The underlying DNS issue must be resolved
- C. The existing zone using ID 7 must be deleted
- D. The search rule must be changed to continue on match
Answer: D
NEW QUESTION 53
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. Include Cisco Unified Communications Manager registration domain in the Expressway-E certificate as a SAN.
- B. Change the FQDN of the Expressway.
- C. Create a new CSR with new information on the SAN field.
- D. Change the domain name.
Answer: A
NEW QUESTION 54
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