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The questions for 300-820 were last updated on April 22, 2022.

Viewing questions 1-13 out of 96 questions:


Where are voice calls handled in a Cisco Jabber hybrid cloud-based deployment with Cisco Webex Platform Service?

A. Voice calls use the Webex Calling platform for call control and uses hybrid media nodes for local conferencing.
B. Voice calls use local media nodes to keep traffic internal for internal traffic and use Webex Calling for external calls.
C. Voice call use Cisco Unified Communications Manager for local calls and Webex Calling for external calls.
D. Voice calls use local Cisco Unified Communications Manager for all calls.

Correct Answer: D


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

Correct Answer: C


Refer to the exhibit.

Calls to locally registered endpoints are failing. At present, there are two endpoints registered locally to this Expressway.
An H.323 endpoint with an alias of “EndpointA” is registered, and a SIP endpoint with an alias of
[email protected]” is also registered.
How is this issue resolved?

A. The dialplan must be redesigned to use the transforms to convert the alias into SIP URI format and then use separate search rules for each format that needs to be dialed within the local zone.
B. The calls are failing because there are insufficient licenses. Additional licenses must be installed for the Expressway to route these calls.
C. The current search rule does not match the call, so the search rule must be modified to include a SIP Variant of “Standards-Based”.
D. Calling parties are placing calls with the wrong domain. End-users must be instructed not to use the pod1. local domain as that is owned by the local system. Calls to any other domain would work.

Correct Answer: A


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.

Correct Answer: BD


Which two licenses are required for the Expressway B2B feature to work? (Choose two)

A. Traversal Server
B. Advanced Networking
C. Device Provisioning
D. Rich Media Sessions
E. TURN Relays

Correct Answer: AD


Refer to the exhibit.

What is the result of a transformation applied to alias 88514?

A. [email protected]
B. 88513@ccnpcollab com
C. [email protected]
D. [email protected]

Correct Answer: C

The answer should be [email protected] since the regex considers anything after digit 8 (excludes 1-7), leaves the rest intact, and replaces the domain. So in the short term, it simply adds the domain after the DN.


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


Refer to the exhibit showing logs from the Expressway-C, a copy of the Expressway-E certificate, and the UC traversal zone configuration for the Expressway-C. An office administrator is deploying mobile and remote access and sees an issue with the UC traversal zone. The zone is showing “TLS negotiation failure”.

What is causing this issue?

A. The Expressway-E certificate includes the Expressway-C FQDN as a SAN entry
B. The Expressway-C is missing the FQDN of Cisco UCM in the Common Name of its certificate
C. In the UC Traversal Zone on the Expressway-C, the peer address is set to the IP of the Expressway-E, which is not a SAN entry in the Expressway-E certificate
D. The Expressway-E does not have the FQDN of Cisco UCM listed as a SAN in its certificate

Correct Answer: D


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.

Correct Answer: B


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


An Expressway-E is configured using a single NIC with NAT.
How must the Expressway-C traversal client zone be configured to connect to the Expressway-E?

A. TLS verification must be enabled.
B. The zone profile must be set to default.
C. The peer address must be the Expressway-E NAT address.
D. The peer address must be the Expressway-E LAN 1 IP address.

Correct Answer: C


Which two types of information does Cisco Expressway back up? (Choose two.)

A. call records
B. log files
C. IP addresses
D. current call states
E. security certificates

Correct Answer: AE

The data saved to a backup file includes:
Bootstrap key (from X8.11)
System configuration settings
Clustering configuration
Local authentication data (but not Active Directory credentials for remotely managed accounts)
User account and password details
Server security certificate and private key
Call detail records (if the CDR service on Expressway is enabled)



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


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