300-820 Sample Questions Answers

Refer to the exhibit.

Which two numbers match the regular expression? (Choose two.)

What is configured on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?

Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?

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Refer to the exhibit showing logs from the Expressway-C, a copy of the Expressway-E certificate, and the UC traversal zone configuration for the Expressway-C. An office administrator is deploying mobile and remote access and sees an issue with the UC traversal zone. The zone is showing “TLS negotiation failure”. What is causing this issue?

For a Mobile and Remote Access deployment, which server's certificate must include the Unified registration domain as a Subject Alternate Name?

Which media encryption mode can be configured on an Expressway zone?

Cisco Collaboration endpoints are exchanging encrypted signaling messages.

What is one major complication in implementing NAT ALG for voice and video devices?

Refer to the exhibit.

When a Jabber user attempts to connect from outside of the organization, the user enters the login information as "user@example.com" 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?

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?

What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?

What should an engineer use to create users for a Cisco Jabber Cloud Deployment?