Cisco 300-820 Practice Exams
Last updated on Oct 22,2026- Exam Code: 300-820
- Exam Name: Implementing Cisco Collaboration Cloud and Edge Solutions (CLCEI)
- Certification Provider: Cisco
- Latest update: Oct 22,2026
An administrator has been tasked to bulk entitle 200 existing users and ensure all future users are automatically configured for the Webex Hybrid Calendar Service.
Which two options should be used to configure these users? (Choose two.)
- A . Export a CSV list of users in the Cisco Webex Control Hub, set the Hybrid Calendar Service to TRUE for users to be enabled, then import the le back to Manage Users menu in the Cisco Webex Control Hub.
- B . Set up an Auto-Assign template that enables Hybrid Calendar.
- C . Select the Hybrid Services settings card in the Cisco Webex Control Hub and import a User Status report that contains only users to be enabled.
- D . On the Users tab in the Cisco Webex Control Hub, check the box next to each user who should be enabled, then click the toggle for the Hybrid Calendar service to turn it on.
- E . From Cisco Webex Control Hub, verify the domain that your Hybrid Calendar users will use, which automatically activates them for the service.
Which complication does a NAT introduce in SDP for a SIP call?
- A . Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.
- B . When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.
- C . The IP address specified in the connection data field may be an unrouteable internal address.
- D . The encryption keys advertised in the SDP are only valid for clients not behind a NAT.
An engineer is supporting an existing Cisco Collaboration deployment that has internal and external home users using the solution without VPN. Business usage also includes B2B calling for voice and video. Suddenly the engineer receives a report that one of the home office users cannot use the Cisco Jabber client, and shortly after, a few more reports come in for the same error.
What must the engineer check first to resolve this issue?
- A . client logs of the users
- B . real-time monitoring toll logs for problems
- C . alarms on the Cisco Expressways
- D . alarms on the Cisco UCM Cluster
Refer to the exhibit.
When a user tries to sign in to the Cisco Jabber client through Mobile and Remote Access, they receive this error message: “Cannot communicate with the server.” The external DNS server is configured with the SRV records listed in the exhibit.
What is the cause of the issue?
- A . The _sips DNS record must target expE-pub.cll-collab.internal and the _cisco-uds DNS record must be removed.
- B . The collab-edge DNS record must be added to the DNS server and the _cisco-uds DNS record must be removed.
- C . A Cisco CSF device must be configured in UC for the user and the _cisco-uds DNS record must be removed.
- D . The HTTP allow list is not allowing communication with the Instant Message and Presence server.
An administrator installs a new webserver (server1.example.com C 10.1.1.90) for storing Cisco Jabber update les to the network, but all Mobile and Remote Access registered clients still run the old Jabber software version, and the update fails.
Which configuration task on an Expressway server solves the Jabber software update issue?
- A . Add a rule with the URL http://server1.example.com:80/ to the outbound HTTP allow list manually to allow pushing the new software to the clients.
- B . Add a rule with the URL http://server1.example.com:80/ to the inbound HTTP allow list manually to allow access to the new web server.
- C . Add a rule with the server IP address 10.1.1.90 in the URL to the inbound HTTP allow list because server names and FQDNs are not supported.
- D . Run an IM and Presence server discovery process on Expressway-C to add the new web server to the inbound HTTP allow list automatically.
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
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 Webex Device Connector.
- D . Deploy a Cisco Expressway Message Connector host.
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 . TCP 443 and 444
- B . TCP 443 and 8443
- C . UDP 5004 and 5005
- D . UDP 33432 through 33433
DRAG DROP
Drag and drop the services from the left onto their descriptions on the right. Some services are used more than once.
Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one complication in implementing NAT ALG for voice and video devices?
- A . NAT ALG is not compatible with the H.323 signaling protocol.
- B . NAT ALG introduces latency in the media path.
- C . The NAT ALG cannot inspect the contents of encrypted signaling messages.
- D . NAT ALG requires the use of NAT reflection, which may not be supported on all firewalls.