300-820 by Cisco Valid Free Exam Practice Test

Question 1

An enterprise is deploying Hybrid Data Security to retain full control over encryption keys while using Webex cloud services for messaging and meetings. An engineer must ensure that:
- All message content is encrypted end-to-end.
- The Key Management Server is hosted on-premises.
- Compliance officers can still perform eDiscovery.
- The deployment integrates with Control Hub for user and policy
management.
Which action must be taken to meet the requirements?

A. Enable Webex Calling Dedicated Instance and configure LDAP sync for identity management. B. Configure Webex Edge Connect and route traffic through a secure tunnel. C. Install the HDS node on-premises and register it with Control Hub using a secure token. D. Deploy Expressway-C/E and enable TLS for signaling and media encryption.

Correct Answer: C

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Question 2

Which method is used to send the incoming call request to the client when the traversal server receives an incoming call for the traversal client?

A. requesting for permission from the firewall B. opening an inbound connection directly to the client through the firewall C. opening an outbound connection directly to the client through the firewall D. using an existing keep alive connection opened by the client

Correct Answer: D

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Question 3

Which protocol and port are used for signaling between on-premises Cisco Webex Video Mesh Nodes and Cloud Media Services?

A. standard SIP over TCP port 5060 B. signaling over TCP port 444 C. standard SIP TLS over TCP port 5061 D. signaling over HTTPS TCP port 443

Correct Answer: D

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Question 4

Refer to the exhibit. The neighbor zone to Cisco UCM fails to come up when TLS verify mode is enabled on the Expressway-C for B2B traffic. Which Issue correctly describes the cause of the error?

A. The neighbor system FQDN is missing from Subject Alternative Name attributes of the certificate. B. Subject Alternative Name fields are longer than 999 characters. C. The certificate has a key length of 8192 bits. D. TLS verify mode is enabled on the neighbor zone.

Correct Answer: A

Question 5

Which device enables microservices to facilitate hybrid services integration in Webex?

A. Cisco Expressway-C B. Cisco UCM C. Cisco Webex Meeting Server D. Cisco Expressway-E

Correct Answer: A

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Question 6

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 _cisco-uds SRV record has been configured. B. Ensure that the SIP domains are added on Expressway Core. C. Ensure that the peer address does not match the Common Name on certificate. D. Ensure that the credential has been entered correctly.

Correct Answer: D

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Question 7

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. Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU. C. When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones. D. The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

Correct Answer: A

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Question 8

An administrator installs a new webserver (server1.example.com - 10.1.1.90) for storing Cisco Jabber update files 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 inbound HTTP allow list manually to allow access to the new web server. B. 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. C. 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. 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.

Correct Answer: A

Question 9

Refer to the exhibit. The administrator attempted to log in, but Jabber clients cannot log in via mobile and remote access. How is this issue resolved?

A. The username [email protected] is invalid. The user should instead sign-in simply as jabberuser. B. The domain pod1.local must be deprovisioned from the Webex cloud for Jabber logins. C. Skype for Business mode must be disabled on the DNS server because it conflicts with Jabber login requirements. D. A DNS SRV record must be created for _collab-edge._tls.pod1.local that points to the Expressway-D.

Correct Answer: D

Question 10

Which Control Hub tool feature helps automate phone license generation and device registration during on-premises to cloud migration?

A. migration wizard B. bulk administration upload C. license portal D. device manager console

Correct Answer: A

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Cisco Implementing Cisco Collaboration Hybrid and Cloud Technologies (CLHCT) v2.0 - 300-820 Exam Practice Test