Nov-2025 Free 300-820 Test Questions Real Practice Test Questions
300-820 Dumps Updated Nov 08, 2025 WIith 210 Questions
NEW QUESTION # 85
For a Mobile and Remote Access deployment, which server's certificate must include the Unified registration domain as a Subject Alternate Name?
- A. Expressway-E server certificate
- B. Expressway-C server certificate
- C. Cisco Unified Communications Manager server certificate
- D. Expressway-C and Expressway-E server certificate
Answer: A
Explanation:
Explanation
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-7/Mobile-Remote-Ac
NEW QUESTION # 86
An engineer must enable the communication between two separate Expressway-C servers to allow inbound and outbound calling between different endpoints registered on each server. Which configuration must happen?
- A. Configure a traversal zone on each server with a destination of the other Expressway-C.
- B. Configure a transform on each server to strip the port numbers at the end of the alias.
- C. Configure a neighbor zone on each server with a destination of the other Expressway-C.
- D. Configure a transform on each server to convert the calling alias into the called alias.
Answer: B
NEW QUESTION # 87
Refer to the exhibit.
Refer to the exhibit. An engineer must configure a B2B traversal zone. Trusted certification authority and server certificates are uploaded to Cisco Expressway-C and Expressway-E servers. After the traversal zone configuration is completed in Expressway-C, the error message in the exhibit appears. What are the two reasons for the error? (Choose two.)
- A. The communication port is not set to 7001.
- B. The traversal zone TLS verify subject name in Expressway-E does not match the FQDN of Expressway-C.
- C. The peer 1 address in Expressway-C must be replaced by the FQDN of Expressway-C.
- D. The peer 1 address in Expressway-C is not the FADN of Expressway-E.
- E. The FQDN of Expressway-E cannot be resolved by the DNS server.
Answer: C,D
NEW QUESTION # 88
Refer to the exhibit.
What is the result of a transformation applied to alias 88514?
- A. [email protected]
- B. [email protected]
- C. 88513@ccnpcollab com
- D. [email protected]
Answer: B
NEW QUESTION # 89
When the network requirements are configured for a new Video Mesh deployment, which firewall ports are required so that Video Mesh cascade signaling succeeds?
- A. UDP 33432 through 33433
- B. TCP 443 and 444
- C. TCP 443 and 8443
- D. UDP 5004 and 5005
Answer: C
Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/videomesh/cmgt_ b_webex-video-mesh-deployment-guide/cmgt_b_hybrid-media-deployment- guide_chapter_010.html
NEW QUESTION # 90
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. Change the domain of SIP endpoint A to cisco.com.
- B. Create a presearch transform.
- C. Disable SIP in the external zone.
- D. Change the interworking mode to On.
Answer: D
NEW QUESTION # 91
Refer to the exhibit.
Mobile Cisco Jabber cannot register with on-premises Cisco Unified Communications Manager using Mobile and Remote Access. Some logs were captured on Expressway Edge.
Which action corrects this problem?
- A. Ensure that the credential has been entered correctly.
- B. Ensure that the _cisco-uds SRV record has been configured.
- C. Ensure that the peer address does not match the Common Name on certificate.
- D. Ensure that the SIP domains are added on Expressway Core.
Answer: A
NEW QUESTION # 92
A company has an on-premises Cisco collaboration cluster that contains Cisco UCM, IM and Presence, and Cisco Webex in the cloud. The company wants to integrate the on-premises infrastructure with Webex to enable interoperability with the Webex App. An engineer already configured the cluster in Cisco UCM, IM and Presence, and the organization in the Webex Control Hub. Which action must the engineer take to complete the configuration?
- A. Deploy Directory Connector.
- B. Open the TCP 443 port from IM and Presence to Webex Cloud.
- C. Deploy a Cisco Expressway Message Connector host.
- D. Deploy a Webex Device Connector.
Answer: A
NEW QUESTION # 93
An engineer reviews the configuration of a pair of Expressway servers for a company with the domain example.com. The company allows toll fraud calls to reach the Cisco UCM only when it expects externally registered devices to call internal 5-digit extensions. The search history shows that the fraudulent calls have a destination URI of 8 or more digits and several domains. What must the engineer configure to prevent all toll fraud calls from going past the Expressway-E to the internal network?
- A. CPL to block calls with a destination URI with 8 or more digits on the Expressway-E
- B. search rules to only route calls with a destination domain of example.com on the Expressway-E
- C. CPL that blocks calls with a destination domain other than example.com on the Expressway-C.
- D. search rules to only route calls with a destination URI of 5 to 8 digits long on the Expressway-E
Answer: A
NEW QUESTION # 94
Refer to the exhibit.
What is the result of a transformation applied to alias 88514?
- A. [email protected]
- B. [email protected]
- C. 88513@ccnpcollab com
- D. [email protected]
Answer: B
NEW QUESTION # 95
Which protocol and port are used for signaling between on-premises Cisco Webex Video Mesh Nodes and Cloud Media Services?
- A. signaling over TCP port 444
- B. standard SIP over TCP port 5060
- C. standard SIP TLS over TCP port 5061
- D. signaling over HTTPS TCP port 443
Answer: D
NEW QUESTION # 96
An administrator made changes to a directory connector for Webex AD synchronization. The number of users synchronized is quite large and the change should affect only a limited number of users. How can the administrator check the result before executing the synchronization?
- A. Initiate a dry run of an incremental synchronization from the Director Connector app on the on-premises Windows server.
- B. Initiate an incremental synchronization from the Director Connector app on the on-premises Windows server because it will ask to save the changes.
- C. Initiate a dry run of an incremental synchronization from the Director Connector in Control Hub.
- D. Initiate an incremental synchronization from the Director Connector in Control Hub because it will ask to save changes.
Answer: D
NEW QUESTION # 97
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. More bandwidth must be added to the appropriate pipes
- C. The existing zone using ID 7 must be deleted
- D. The underlying DNS issue must be resolved
Answer: A
NEW QUESTION # 98
Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?
- A. _cisco-uds-edge on port 5061
- B. _cisco-uds on port 8443
- C. _collab-edge on port 5061
- D. _collab-edge on port 8443
Answer: D
NEW QUESTION # 99
What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?
- A. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
- B. 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.
- C. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
- D. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.
Answer: A
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html
NEW QUESTION # 100
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: B
NEW QUESTION # 101
Drag and drop the required SAN field items from the left onto the features within the server categories on the right.
Answer:
Explanation:
NEW QUESTION # 102
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 priority of the SRV record for cisco-uds.
- C. Remove the cisco-uds SRV record for the external DNS.
- D. Change the collab-edge record to point to 5061.
Answer: C
NEW QUESTION # 103
Refer to the exhibit.
An ISDN gateway is registered to Expressway-C with a prefix of 9 and/or it has a neighbor zone specified that routes calls starting with a 9.
Which value should be entered into the "Source" field to prevent toll fraud regardless at origin of the call?
- A. Traversal Zone
- B. Any
- C. All
- D. Neighbor Zone
Answer: C
NEW QUESTION # 104 
Refer to the exhibit. An engineer is deploying mobile and remote access in an environment that already had functioning Business to Business calling. Mobile and remote access SIP registrations are failing. To troubleshoot, SIP logs were collected. How is this issue resolved?
- A. Change the "Incoming Port" in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations
- B. Write a custom normalization script since the "vcs-interop" normalization script does not allow registrations
- C. Change the SIP profile on the SIP trunk for the Expressway-E to Standard SIP Profile for TelePresence Endpoint
- D. Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service
Answer: A
NEW QUESTION # 105
A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.
Which statement is true?
- A. 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.
- B. Webex Cloud supports either a DMZ-based Mesh Node for security or an internal-based Mesh Node for media control only.
- C. Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams clients. A DMZ node is added for extra security.
- D. 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.
Answer: A
NEW QUESTION # 106
Which complication does a NAT introduce in SDP for a SIP call?
- A. The IP address specified in the connection data field may be an unrouteable internal address.
- B. When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.
- C. The encryption keys advertised in the SDP are only valid for clients not behind a NAT.
- D. Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.
Answer: A
Explanation:
The problem is that if NAT enabled, some firewalls doesn't write the translated address into the SIP Signalling (fortinet for example has VIP feature that make it works).
NEW QUESTION # 107
Refer to the exhibit.
Which description of the transformation is true?
- A. It converts [email protected]:<port> to [email protected]
- B. It converts [email protected]:<port> to [email protected]
- C. It changes [email protected]:<port> to [email protected]
- D. It changes all patterns that begin with [email protected]:<port> to [email protected]
Answer: B
NEW QUESTION # 108
Which complication does a NAT introduce in SDP for a SIP call?
- A. When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.
- B. The encryption keys advertised in the SDP are only valid for clients not behind a NAT.
- C. Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.
- D. The IP address specified in the connection data field may be an unrouteable internal address.
Answer: B
NEW QUESTION # 109
Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in the corporate DMZ?
- A. when you require encrypted calls to endpoints on your corporate LAN
- B. when you want to enable calls to web applications by using HTTP
- C. when video endpoints that reside on the Internet require administrative access to the Cisco Expressway Edge
- D. when you require administrative access to the Cisco Expressway Edge from the Internet
Answer: D
NEW QUESTION # 110
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Cisco 300-820: Topics
The Cisco 300-820 exam validates the knowledge and skills of the professionals in a wide range of areas. The content of this certification test revolves around four domains. Let’s have a closer look at these topics and the skills covered within them.
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