Cisco 300-820 Practice Exams
Last updated on Oct 21,2026- Exam Code: 300-820
- Exam Name: Implementing Cisco Collaboration Cloud and Edge Solutions (CLCEI)
- Certification Provider: Cisco
- Latest update: Oct 21,2026
An engineer attempts to upload a server certificate to an Expressway-C server but receives an error when they click the upload button that says that the le is invalid. The engineer is advised that this happens because the certificate was signed incorrectly and is missing an attribute.
What must the engineer do to upload the certificate?
- A . Create a certificate request via Certificate Services Web Page and ensure that the certificate validity period is five years because the Expressway server validates this during certificate import.
- B . Create a certificate request via the Certificate Services Web Page and ensure that the Subject Common Name eld contains the server FQDN and all Cisco Unified CM phone security pro le names.
- C . Create a new certificate template with "Server authentication” and "Client authentication" enabled and use this template when signing the Expressway server certificate.
- D . Create a new certificate template with the certificate attribute "Allow private key to be exported" enabled and use this template when signing the Expressway server certificate.
Refer to the exhibit.
A Cisco Webex device on an enterprise network has identified the given STUN round-trip delays in milliseconds to the enterprise Video Mesh clusters and two Webex Cloud Media clusters during the call setup.
Which correct sequence of clusters is the client connecting to?
- A . US West Coast WCMC. If US West Cost WCMC is full, then Europe WCMC because clients select clusters in the order of SRT delays.
- B . DC Europe. If DC Europe is full, DC APAC because clients select on-premises clusters in the order of SRT delays before using cloud resources,
- C . DC Europe. If DC Europe is full, US West Coast WCMC because clients select resources in the order of SRT delays but ignore SRTs greater than 250 ms
- D . US West Coast WCMC. Clients continuously monitor DC US cluster and reconnect when DC US are available to save bandwidth.
Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)
- A . unsolicited notify
- B . RFC 2833
- C . KPML
- D . passthrough
- E . H.245 user input indication
BE
Explanation:
Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco-Expressway-Administrator-Guide-X12-6.pdf
Refer to the exhibit.
Logins and failing via mobile and remote access.
How is this resolved?
- A . Mobile and remote access login has not been enabled for the domain configured in the Expressway-C. The domain must be edited to allow Cisco UCM registrations.
- B . SIP is disabled on the Expressway-E. The SIP protocol must be enabled on the server.
- C . No Cisco UCM servers are configured in the Expressway-C. Servers must be added for Call Manager and IM and Presence services.
- D . Although a traversal client zone exists, there is no Unified Communications traversal client zone. One must be created.
Which zone is required between Expressway-E and Expressway-C in Mobile and Remote Access deployments?
- A . Unified Communications traversal zone
- B . neighbor zone
- C . DNS zone
- D . traversal zone
An administrator is deploying Cisco Expressways for Mobile and Remote Access. The registration domain is “example.com”, and the Expressway-E FQDN is “expe.example.com”. Cisco Jabber clients on the internet cannot discover services via DNS lookup.
Which SRV records must be configured in the public DNS to allow Service Discovery?
- A . _collab-edge._tls.example.com
- B . _cisco-uds_tcp.expe.example.com
- C . _cisco-uds_tcp.example.com
- D . _collab-edge_tls.expe.example.com
Which connection does the traversal zone configuration de ne?
- A . Expressway-E and Collaboration Endpoints
- B . Cisco UCS E-Series and Cisco UCM
- C . Cisco UC and Cisco Unified Presence Server
- D . Cisco Expressway-C and Cisco Expressway-E platforms
D
Explanation:
Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/cong_guide/X8-11/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X8-11-4.pdf
Which service is available in a cloud-based deployment using Cisco Webex Messenger?
- A . Presence
- B . Phone services
- C . Voicemail
- D . Call forward services
What is the default DSCP value for video traffic that is routed through an Expressway server?
- A . 36
- B . 24
- C . 0
- D . 34
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
- A . call routing
- B . traversal subzone
- C . call policy
- D . search rule
A
Explanation:
Reference: https://cmslab.ciscolive.com/pod8/cucm/expctrunk