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300-820 Questions and Answers

Question # 6

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

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Question # 7

Which step is required when configuring Cisco Webex Hybrid Message Service?

A.

Register Expressway-C Connector Hosts to the Cisco Webex Cloud.

B.

Register Expressway-C to Cisco Unified Communications Manager.

C.

Add Expressway-C and Cisco United CM to the Cisco Webex Cloud.

D.

Add Cisco Unity Connection to Expressway-E.

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Question # 8

When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

A.

Webex CUSP Cluster Name

B.

Expressway-E Cluster Name

C.

Cisco Unified Communications Manager Publisher FQDN

D.

Expressway-C Cluster Name

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Question # 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

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Question # 10

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

A.

Voice calls use Webex Calling platform for call control and use 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.

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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

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Question # 12

Refer to the exhibit.

A new neighbor zone is added for a new Cisco Meeting Server, but the zone is showing a

SIP status of failed from the time the zone it was created. What should be done to resolve this issue?

A.

The search rule must be changed to continue on match

B.

The existing zone using ID 7 must be deleted

C.

More bandwidth must be added to the appropriate pipes

D.

The underlying DNS issue must be resolved

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Question # 13

What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?

A.

1024

B.

2048

C.

4096

D.

8192

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Question # 14

Cisco Collaboration endpoints are exchanging encrypted signaling messages.

What is one major complication in implementing NAT ALG for voice and video devices?

A.

Internal endpoints cannot use addresses from the private address space.

B.

The NAT ALG cannot inspect the contents of encrypted signaling messages.

C.

NAT ALG introduces jitter in the voice path.

D.

Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.

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