All About Certified 300-820 Preparation

NEW QUESTION 1
Which statement about scheduling Expressway backups is true?

• A. It is not supported on the application.
• B. It is allowed from the application CLI of the Expressway only.
• C. It is allowed from the application CLI and GUI of the Expressway.
• D. It is allowed from the application GUI of the Expressway only.

Answer: C

NEW QUESTION 2
Which media encryption mode can be configured on an Expressway zone?

• A. Advanced Encryption Standard
• B. IPsec
• C. Triple Data Encryption Standard
• D. force unencrypted

Answer: A

NEW QUESTION 3
An organization wants to enable a Cisco Webex connector to synchronize all employees automatically with Cisco Webex instead of using a manual list. Where is the Webex Hybrid Directory Service configured?

• A. Install Cisco Directory Connector on a Microsoft Windows Domain server and configure the software and Webex Control Hub.
• B. Enable the directory service in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub.
• C. Enable the directory service on Cisco Expressway Edge for Office 365 or Cisco Expressway Core for internal Active Directory and add the service in Webex Control Hub.
• D. Install the Cisco Express Connector and configure the device in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub.

Answer: A

NEW QUESTION 4

Refer to the exhibit. An ISDN gateway is registered to Expressway-C with a prefix of 9 and/or it has a neighbor zone specified that routes calls starting with a 9. Which value should be entered into the "Source" field to prevent toll fraud regardless at origin of the call?

• A. Traversal Zone
• B. Any
• C. Neighbor Zone
• D. All

Answer: D

NEW QUESTION 5
Which service is available in a cloud-based deployment using Cisco Webex Messenger?

• A. Presence
• B. Phone services
• C. Voicemail
• D. Call forward services

Answer: A

NEW QUESTION 6
Which step is taken when configuring a Cisco Expressway solution?

• A. Configure the Expressway-E by using a non-traversal server zone.
• B. Enable static NAT on the Expressway-E only.
• C. Disable H.323 mode on the Expressway-E.
• D. Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.

Answer: B

NEW QUESTION 7

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. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
• B. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
• C. Add a server certificate to the Expressway-C that is signed by a certificate authority.
• D. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.

Answer: D

NEW QUESTION 8
A company already has a Cisco Unified Communications Manager for internal audio and video traffic, but it requires video communication with external partners and customers. It is important to ensure security for the deployment and the connectivity.
What must be set up to enable this requirement?

• A. Cisco Unified Border Element and Cisco ASA Firewall
• B. Cisco Unified Border Element and Cisco Firepower Firewall
• C. Cisco Expressway-C and Cisco Expressway-E
• D. Cisco Expressway-C and Cisco Unified Border Element

Answer: C

NEW QUESTION 9

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?

• A. Both Cloud Node US-EAST and US-WEST
• B. Video Mesh Cluster-2
• C. Cloud Node US-EAST
• D. Cloud Node US-WEST

Answer: B

NEW QUESTION 10
Which two statements about Expressway media traversal are true? (Choose two.)

• A. Expressway Control is the traversal server installed in the DMZ.
• B. The Expressway Edge must be put in a firewall DMZ segment.
• C. Cisco Unified Communications Manager zone can be either traversal server or client.
• D. The Unified Communications traversal zone can be used for Mobile and Remote Access.
• E. Both Expressway Edge interfaces can be NATed.

Answer: BD

NEW QUESTION 11
A company is installing Cisco Collaboration infrastructure and one of the requirements is that they must be able to communicate with many external parties that are using H.323 and SIP. Internally they want to register the endpoints only on SIP. Which functionality would describe the feature that needs to be enabled and where to achieve this?

• A. Interworking in Expressway-C
• B. Transcoding in Cisco Unified Communications Manager
• C. Transcoding in Expressway-C
• D. Interworking in Cisco Unified Communications Manager

Answer: B

NEW QUESTION 12
An administrator has been asked to configure Video Mesh signaling traffic to route through a proxy.
Which is an available proxy type in the Video Mesh node configuration to support this deployment model?

• A. Transparent Explicit Proxy
• B. Transparent Inspecting Proxy
• C. Reverse Proxy
• D. Distorting Proxy

Answer: B

NEW QUESTION 13
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. 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.
• D. Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams client
• E. A DMZ node is added for extra security.

Answer: C

NEW QUESTION 14
In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

• A. Cisco Expressway-E and endpoints outside the enterprise
• B. Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P
• C. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager
• D. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise

Answer: A

NEW QUESTION 15

Refer to the exhibit. Which description of the transformation is true?

• A. It converts 4123@exp-name.exp.domain:<port> to 4123@exp.domain
• B. It changes all patterns that begin with 4123@exp-name.exp.domain:<port> to 1@exp.domain
• C. It changes 413@exp-name.exp.domain:<port> to 413@exp.domain
• D. It converts 4.3@exp-name.exp.domain:<port> to 1@exp.domain

Answer: A

NEW QUESTION 16
When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

• A. SDP b-line
• B. SIP record route
• C. SDP c-line
• D. SDP m-line

Answer: C

NEW QUESTION 17
Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

• A. _collab-edge on port 8443
• B. _cisco-uds-edge on port 5061
• C. _collab-edge on port 5061
• D. _cisco-uds on port 8443

Answer: A

NEW QUESTION 18
Which step is required when configuring cloud and hybrid deployments for Cisco Jabber?

• A. Add the Jabber user to Cisco Unity Connection.
• B. Add the Jabber user to Expressway-E.
• C. Add the Jabber user to Expressway-C.
• D. Add Jabber Users to the Cisco Webex Administration Tool.

Answer: D

NEW QUESTION 19
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.

Answer: B

NEW QUESTION 20
What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

• A. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
• B. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
• C. ICE uses FAST updates to optimize the video quality in case of packet los
• D. This technology is available only from Cisco Unified CM version 11.5 and later.
• E. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.

Answer: B

NEW QUESTION 21
A Jabber user is being prompted to trust the Expressway-E certificate when using Mobile and Remote Access. The administrator has validated that the Expressway-E certificate is being trusted by the machine running the Jabber client.
What else can be done to solve this problem?

• A. Create a new CSR with new information on the SAN field.
• B. Include Cisco Unified Communications Manager registration domain in the Expressway-E certificate as a SAN.
• C. Change the domain name.
• D. Change the FQDN of the Expressway.

Answer: B

NEW QUESTION 22
When configuring a Cisco Expressway solution and need to design the dial plan with various rules for URIs and numbers coming through the device. To do so, it is important that some dial plan rules are applied in a certain order. When configuring the transform section, you must know the range of the priorities.
Which range is correct?

• A. any number in the drop-down menu
• B. any number in the dialog box
• C. any number between 1-128
• D. any number between 1-65534

Answer: D

NEW QUESTION 23
Which two statements about Mobile and Remote Access certificate are true? (Choose two.)

• A. Expressway Core can use private CA signed certificate.
• B. You must upload the root certificates in the phone trust store.
• C. Expressway must generate certificate signing request.
• D. Expressway Edge must use public CA signed certificate.
• E. The Jabber client can work with public or private CA signed certificate.

Answer: CD

NEW QUESTION 24
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