Free Access Cisco.300-820.v2025-04-04.q130 Practice Test (Page 19)

Question 86

An engineer configures a Cisco Collaboration environment to use Mobile and Remote Access for external access for company users. The engineer uses OAuth with refresh on the Cisco UCM SIP lines for extra security and improved user experience. During the setup, Mobile and Remote Access does not work, it is enabled on the Cisco UCM and Cisco Expressways. SIP trunks on ports 5090 and 5091 are configured to avoid conflicts with other SIP trunks between internal Cisco UCM clusters. The traversal zone also uses port 6500. The traversal zone between Expressways shows no errors, and the requests hit Expressway-E from the Internet. What is the reason that the solution does not work?

A.The default port for Mobile and Remote Access is 6001. Therefore, the traversal port must be port
6001 for Mobile and Remote Access to work.

B.Mobile and Remote Access does not support OAuth with refresh with this configuration,

C.The default port for Mobile and Remote Access is 6500, which creates a conflict with the existing traversal zone port.

D.The default port for Mobile and Remote Access is 5091, which creates a conflict with the existing SIP trunks.

Question 87

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 2222 from Expressway-E to Expressway-C

B.port 7001 from Expressway-C to Expressway-E

C.port 7001 from Expressway-E to Expressway-C

D.port 2222 from Expressway-C to Expressway-E

Question 88

What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?

A.The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.

B.Encrypted IP traffic for collaboration devices always is trusted by the firewall.

C.The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.

D.The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

Question 89

Refer to the exhibit.

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

A.d20d16d20d22

B.209165200224

C.209165200225

D.2091652010224

E.d209d165d200d224

Question 90

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 an intermediate 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.Configure the Expressway-C Traversal Client zone transport protocol with TCP.

D.Add a server certificate to the Expressway-C that is signed by a certificate authority.

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Question 86

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Question 88

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Question 90

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