Free Cisco 300-820 Practice Test & Real Exam Questions, Page 3

Question #23

An engineer is configuring Cisco Expressway-E and needs to implement toll fraud prevention.
Which configuration meets this requirement?

A. Enable and configure the Expressway-E firewall.

B. Configure the external firewall to block specific IPs.

C. Enable and configure local call policy.

D. Enable SIP ALG inspection on the network address translation firewall.

Discussion 0

Correct Answer: C Vote an answer

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Question #24

A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.
Which statement is true?

A. Webex Cloud supports either a DMZ-based Mesh Node for security or an internal-based Mesh Node for media control only.

B. Installing a Video Mesh Node in the DMZ requires you to open TCP and UDP port 4444 in your internal firewall for full clustering functionality.

C. Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams clients. A DMZ node is added for extra security.

D. Installing a Video Mesh Node in the DMZ requires the external firewall to allow UDP traffic from ANY port to the address of the Video Mesh Nodes via port 5004.

Discussion 0

Correct Answer: D Vote an answer

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Question #25

Which two scenarios need a proper DNS configuration on Expressway servers? (Choose two.)

A. Expressway servers verify the common name attribute in server certificates.

B. Admins download software updates from the Cisco website via WebUI.

C. Expressway servers use NTP peer authentication for secure time updates.

D. Expressway servers route calls based on SIP URI.

E. Admins avoid IP address configuration for neighbor zone peers.

Discussion 0

Correct Answer: D,E Vote an answer

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Question #26

Which technique can be used to have media flow directly between two endpoints that have a NAT between them?

A. Cisco access protocol can make a direct path between endpoints on an internal network.

B. Cisco Mobile and Remote Access allows for media traffic directly between two internal endpoints.

C. STUN makes UDP connections through NAT devices.

D. The endpoints can use a Cisco router API to disable NAT temporarily.

Discussion 0

Correct Answer: C Vote an answer

Question #27

Which 16-digit number is unique to a serial number and is used to enable the system?

A. release key

B. RMS license key

C. Expressway series

D. option key

Discussion 0

Correct Answer: A Vote an answer

Question #28

A company is implementing Cisco Webex but has existing legacy Cisco video endpoint registered on-premises. The administrator of Webex wants the SIP address of these rooms to appear in the directory listing on Webex registered endpoints and in the Webex App. How can this be configured?

A. Using the Directory Connector, room resources with flex licenses only can be synchronized with Webex to make the SIP address appear in the phonebook of the Webex App or the endpoint.

B. Using the Directory Connector, room resources without Webex licenses can be synchronized with Webex to make the room appear in the phonebook of the Webex App or the endpoint. SIP address is then entered from Control Hub because it will not match the field.

C. Using the Directory Connector, room resources without Webex licenses can be synchronized with Webex to make the SIP address appear in the phonebook of the Webex App or the endpoint.

D. Using the Directory Connector, room resources with flex licenses only can be synchronized with Webex to make the room appear in the phonebook of the Webex App or the endpoint. SIP address is then entered from Control Hub because it will not match the field.

Discussion 0

Correct Answer: C Vote an answer

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Question #29

A technical support team is deploying a new Cisco Desk Pro endpoint for a user. The device has been physically connected to the network, received an IP address, and can successfully ping general internet websites. However, when attempting to activate the device using the activation code from Webex Control Hub, the Desk Pro shows a Registration Failed message, and its status in Control Hub remains Unregistered. What is the cause of the registration failure?

A. A room OS device can be added only using its MAC address. The activation code from Control Hub ends up in failed registration.

B. The endpoint's system time is significantly out of sync with Network Time Protocol servers.

C. The organization's firewall or proxy server is blocking specific ports or URLs required for Webex Cloud service communication.

D. The 24-hour window of the Activation code has passed, after which the code returns invalid_error.

Discussion 0

Correct Answer: C Vote an answer

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Question #30

An engineer learns from an end user that calls from outside the company are not being received.
Calls are being made to other businesses outside of the company on video using URL addresses.
The change management log shows no changes in the configuration of the collaboration solutions. The engineer examines the endpoint, which seems to be registered to the Cisco UCM, and the SIP trunk between the Cisco UCM and sees that the Expressway is also up. In addition, the traversal link shows no errors between the Expressways. Which action must the engineer take to troubleshoot this issue?

A. On the Expressway-E, run diagnostic logging under maintenance to see if any requests reach the system.

B. On the Cisco UCM, run the Real-Time Monitoring Tool to see if any incoming calls fail.

C. On the Expressway-E, check the NTP settings to ensure that TLS will be able to terminate. If the clock is out of sync, incoming calls from other working systems would work bur not outgoing calls from the company.

D. On the Expressway-C, run a network log under administrative tools to see if any requests reach the system.

Discussion 0

Correct Answer: A Vote an answer

Question #31

Cisco Expressway is often deployed in which of the following configurations?

A. As a pair with Cisco Expressway-E, with connection to CUCM and Expressway-C deployed in DMZ

B. Standalone with Cisco Expressway-E

C. As a pair with Cisco Expressway-C, with connection to CUCM and Expressway-E deployed in DMZ

D. Standalone with Cisco Expressway-C

Discussion 0

Correct Answer: C Vote an answer

Question #32

Which dial plan settings can be used to set up different regulations according to the protocol (SIP or H.323) or the source of the query?

A. presearch transforms

B. policy services

C. call policy

D. search rules

Discussion 0

Correct Answer: D Vote an answer

Question #33

Refer to the exhibit. A Cisco UCM cluster in mixed mode is integrated with Cisco Expressway-C for Mobile and Remote Access endpoint registration. TLS verify mode is enabled and self-signed certificates with the same common name for Cisco Tomcat and Cisco Call Manager are uploaded to Expressway-C. A Cisco Jabber client fails to register by using secure SIP. Which two configurations are the cause of the issue? (Choose two.)

A. The Jabber client cannot connect to its associated phone device by using Cisco Computer Telephony Integration.

B. The Tomcat certificate has the incorrect FQDN for the Cisco UCM server.

C. The Call Manager certificate is causing a conflict.

D. The incorrect secure device profile was applied to the Jabber client.

E. The Expressway-C does not allow two self-signed certificates with the same CN to be trusted.

Discussion 0

Correct Answer: C,E Vote an answer

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