2026 Updated Cisco 300-820 Certification Study Guide Pass 300-820 Fast
300-820 Dumps PDF 2026 Program Your Preparation EXAM SUCCESS
Cisco 300-820 exam is a challenging certification that requires a strong understanding of Cisco collaboration solutions. Candidates are required to have experience in configuring and managing Cisco Unified Communications Manager and Cisco Expressway. They should also have experience in integrating Cisco Webex with other collaboration solutions.
NEW QUESTION # 83
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. ICE cannot reduce the packet loss on the link
- B. The video call is using 4K resolution, which is not supported by ICE with CUCM 12.5
- C. A STUN cannot punch holes in the firewall
- D. The video call is using encryption, which is not supported by ICE with CUCM 12.5
Answer: C
NEW QUESTION # 84
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. C.Expressway-E server certificate
- C. Expressway-C and Expressway-E server certificate
- D. Cisco Unified Communications Manager server certificate
Answer: B
NEW QUESTION # 85
Refer to the exhibit.
Which two numbers match the regular expression? (Choose two.)
- A. 0
- B. 1
- C. 2
- D. d20d16d20d22
- E. d209d165d200d224
Answer: B,C
NEW QUESTION # 86
Refer to the exhibit.
Which description of the transformation is true?
- A. It converts [email protected]:<port> to [email protected]
- B. It changes all patterns that begin with [email protected]:<port> to [email protected]
- C. It changes [email protected]:<port> to [email protected]
- D. It converts [email protected]:<port> to [email protected]
Answer: D
NEW QUESTION # 87
An engineer wants to configure a zone on the Expressway-E to receive communications from the Expressway-C in order to allow inbound and outbound calls.
How is the peer address configured on the Expressway-C when Expressway-E has only one NIC enabled and is using static NAT mode?
- A. Cisco UCM FQDN
- B. Expressway-E DHCP
- C. Expressway-E FQDN
- D. Cisco UCM DHCP
Answer: C
Explanation:
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
NEW QUESTION # 88
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. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
- C. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
- D. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
Answer: A
NEW QUESTION # 89
Which media encryption mode can be configured on an Expressway zone?
- A. force unencrypted
- B. Triple Data Encryption Standard
- C. Advanced Encryption Standard
- D. IPsec
Answer: A
Explanation:
Available modes are "Force encrypted, Force unencrypted, Auto and Best Effort".
NEW QUESTION # 90
An organization has a domain name of example.com. Which two SRV records are valid for a SIP and H 323 communication? (Choose two)
- A. _sips_tcp.example.com
- B. _h323ls._udp.example.com
- C. _h323ls_tcp.example.com
- D. _sips._udp.example.com
- E. _collab-edge._tls.example.com
Answer: A,B
NEW QUESTION # 91
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. signaling over HTTPS TCP port 443
- D. standard SIPTLS over TCP port 5061
Answer: A
NEW QUESTION # 92
Refer to the exhibit.
Which two numbers match the regular expression? (Choose two.)
- A. 0
- B. 1
- C. 2
- D. d20d16d20d22
- E. d209d165d200d224
Answer: B,C
NEW QUESTION # 93
Which set of actions configures ACME certificates on Expressways?
- A. Configure ACME Certificate settings on your Expressway-C, and change the ACME automated scheduler field to ON.
- B. Configure ACME Certificate settings on your Expressway-C, and change the ACME automated scheduler field to OFF.
- C. Configure ACME Certificate settings on your Expressway-E, disable the Expressway cluster, and change the ACME automated scheduler field to OFF.
- D. Configure ACME Certificate settings on your Expressway-E, and change the ACME automated scheduler field to ON.
Answer: D
NEW QUESTION # 94
Refer to the exhibit.
Which two numbers match the regular expression? (Choose two.)
- A. 0
- B. 1
- C. 2
- D. d20d16d20d22
- E. d209d165d200d224
Answer: B,C
NEW QUESTION # 95
A collaboration engineer is configuring Cisco Webex Edge for video conferencing devices to provide support for Cisco Webex Control Hub configuration management. Which configuration control mode must be set on Cisco UCM for Control Hub to manage the on-premises device configuration?
- A. Cisco UCM and endpoint
- B. endpoint only
- C. Webex Edge only
- D. Cisco UCM only
Answer: D
NEW QUESTION # 96
Which statement about scheduling Expressway backups is true?
- A. It is allowed from the application CLI and GUI of the Expressway.
- B. It is allowed from the application CLI of the Expressway only.
- C. It is allowed from the application GUI of the Expressway only.
- D. It is not supported on the application.
Answer: D
NEW QUESTION # 97
Which service is available in a cloud-based deployment using Cisco Webex Messenger?
- A. Phone services
- B. Voicemail
- C. Presence
- D. Call forward services
Answer: C
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/spark/hybridservices/messageservice
NEW QUESTION # 98
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 fails.
- C. The call is queued.
- D. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.
Answer: A
NEW QUESTION # 99
Refer to the exhibit.
The firewall has been configured from NAT 192.168.108.2 to 100.64.0.1. Which configuration changes are needed for an Expressway-E with dual network interfaces?
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: B
NEW QUESTION # 100
A company is implementing Cisco Webex but has existing legacy Cisco video endpoint registered on-premises. The administrator of Webex wants the SIP address of these rooms to appear in the directory listing on Webex registered endpoints and in the Webex App. How can this be configured?
- A. Using the Directory Connector, room resources without Webex licenses can be synchronized with Webex to make the SIP address appear in the phonebook of the Webex App or the endpoint.
- B. Using the Directory Connector, room resources without Webex licenses can be synchronized with Webex to make the room appear in the phonebook of the Webex App or the endpoint. SIP address is then entered from Control Hub because it will not match the field.
- C. Using the Directory Connector, room resources with flex licenses only can be synchronized with Webex to make the SIP address appear in the phonebook of the Webex App or the endpoint.
- D. Using the Directory Connector, room resources with flex licenses only can be synchronized with Webex to make the room appear in the phonebook of the Webex App or the endpoint. SIP address is then entered from Control Hub because it will not match the field.
Answer: A
Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/spark/hybridservices/di rectoryconnector/cmgt_b_directory-connector-guide-admins/cmgt_b_directory-connector-guide- admins_chapter_01001.html
NEW QUESTION # 101
A company already has a Cisco Unified Communications Manager for internal audio and video traffic, but it requires video communication with external partners and customers. It is important to ensure security for the deployment and the connectivity.
What must be set up to enable this requirement?
- A. Cisco Unified Border Element and Cisco Firepower Firewall
- B. Cisco Expressway-C and Cisco Expressway-E
- C. Cisco Expressway-C and Cisco Unified Border Element
- D. Cisco Unified Border Element and Cisco ASA Firewall
Answer: B
NEW QUESTION # 102
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 convert the calling alias into the called 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 strip the port numbers at the end of the alias.
Answer: C
NEW QUESTION # 103
An administrator is configuring DNS to allow Mobile and Remote Access logins for the domain cisco.com. Where must the _collab-edge_tls.cisco.com DNS SRV record be configured?
- A. in the public DNS server
- B. in DNS SRV settings under Cisco Unified OS Administration in Cisco UCM
- C. in DNS settings in the Expressway-E on the interface that faces the Internet
- D. in DNS settings under Cisco Unified OS Administration in Cisco UCM
Answer: A
NEW QUESTION # 104
Refer to the exhibit. A collaboration engineer is configuring Cisco Expressway for B2B calling.
The engineer must allow inbound calls to be routed to Cisco UCM. The traffic must be unencrypted between the Expressway-C and the Cisco UCM cluster. Which configuration correctly implements the zone?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 105
An engineer must fix broken SSH tunnels between Expressway-C (192.168.10.5) and Expressway-E (192.168.20.5). The engineer is advised that the packet capture shows the required packets for the SSH tunnels leaving the Expressway-C but not reaching the Expressway-E. Which firewall configuration must the engineer allow to resolve this issue?
- A. port 7001 from Expressway-E to Expressway-C
- B. port 7001 from Expressway-C to Expressway-E
- C. port 2222 from Expressway-C to Expressway-E
- D. port 2222 from Expressway-E to Expressway-C
Answer: B
NEW QUESTION # 106
What is a benefit of Cisco Webex Messenger Cloud deployment?
- A. There is no additional cost to use a cloud deployment.
- B. Cloud deployment is faster than using an on-premises deployment.
- C. Cloud deployment is more secure than an on-premises deployment.
- D. Cloud deployment allows interoperability between Cisco Jabber and Webex Teams users.
Answer: D
Explanation:
Cisco Webex Messenger integrates with Cisco Unified Communications Manager and Cisco Webex Meeting Center to support click-to-call, phone control, voice, video, visual voicemail, and web collaboration. It allows you to communicate and collaborate effectively from anywhere you have an Internet connection.
NEW QUESTION # 107
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