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1. How does an administrator configure an Expressway to make sure an external caller cannot reach a specific internal address?
A. add the specific URI in the firewall section of the Expressway and block it
B. block the call with a call policy rule in the Expressway-E
C. add a search rule route all calls to the Cisco UCM
D. configure FAC for the destination alias on the Expressway
Correct Answer: B
2. 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
Correct Answer: A
3. What 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 loss. This technology is available only from Cisco Unified CM version 11.5 and later.
D. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.
Correct Answer: B
The following ICE-capable endpoints can send media directly to each other when they are MRA-registered and ICE passthrough is enabled https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html
4. 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
Correct Answer: C
as c-line shows the connection information, Media IP address. So if it is natted it will be reflected there.
5. Refer to the exhibit. Logins and failing via mobile and remote access. How is this resolved?
A. Mobile and remote access login have not been enabled for the domain configured in the Expressway-C. The domain must be edited to allow Cisco UCM registrations.
B. SIP is disabled on the Expressway-E. The SIP protocol must be enabled on the server.
C. No Cisco UCM servers are configured in the Expressway-C. Servers must be added for CallManager and IM and Presence services.
D. Although a traversal client zone exists, there is no Unified Communications traversal client zone. One must be created.
Correct Answer: C
6. 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.
Correct Answer: A
7. Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints. How do Expressway- C and Expressway E communicate?
A. Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint.
B. Internal endpoints are registered to Expressway-E in the DMZ. Expressway-C, which is also in the DMZ, will receive and make calls on behalf of Expressway-E because they are in the same network.
C. Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint.
D. Internal endpoints are registered to Expressway-C in the DMZ. Expressway-E, which is also in the DMZ, will receive and make calls on behalf of Expressway-C because they are in the same network.
Correct Answer: A
8. 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 IMandP
C. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager
D. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise
Correct Answer: A
9. Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
A. Off
B. Auto
C. Force Encrypted
D. Best Effort
Correct Answer: B
Auto – no specific media encryption policy is applied by the Expressway. Media encryption is purely dependent on the target system/endpoint requests. This is the default behavior and is equivalent to how the Expressway operated before this feature was introduced.
10. 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 clients. A DMZ node is added for extra security.
Correct Answer: C
11. What are two reasons why port 8443 is unreachable from the Internet to the Expressway- E? (Choose two.)
A. The MRA license is missing on the Expressway-E.
B. The Unified Communications zone is down.
C. Transform is not configured on Expressway-E.
D. The SRV record for _cisco-uds is misconfigured.
E. The firewall is blocking the port.
Correct Answer: BE
12. 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.
Correct Answer: D
13. What is one of the user-related prerequisites for Jabber Team Messaging Mode Installation?
A. Create user accounts in Cisco Webex Control Hub only.
B. Create user accounts in Cisco Unified Communications Manager only.
C. Create user accounts in Cisco Unified IM and Presence.
D. Create user accounts in Cisco Unified CM and Cisco Webex Control Hub.
Correct Answer: D
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