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Question 1

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Which complication does a NAT introduce in SDP for a SIP call?

Question 2

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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

Question 3

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

Question 4

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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 th

Question 5

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What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?

Question 6

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Cisco Collaboration endpoints are exchanging encrypted signaling messages. What is one major complication in implementing NAT ALG for voice and video devices?

Question 7

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What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)

Question 8

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

Question 9

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What is the purpose of a transform in the Expressway server?

Question 10

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An organization with a domain name of example.com. Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)

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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?

Which complication does a NAT introduce in SDP for a SIP call?

Refer to the exhibit. Mobile and remote access is being added to an existing B2B deployment and is failing. When the administrator looks at the alarms on the Expressway-C, the snippets are shown. Which configuration action should the administrator take to fix this issue?

An administrator has been tasked to bulk entitle 200 existing users and ensure all future users are automatically configured for the Webex Hybrid Calendar Service. Which two options should be used to configure these users? (Choose two.)

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?

An engineer is deploying an Expressway solution for the SIP domain Cisco.com. Which SRV record should be configured in the public DNS to support inbound B2B calls?

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?

What is the purpose of a transform in the Expressway server?

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

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?

Question 14 - 300-820 discussion

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Which role does Call Policy play when preventing toll fraud on Expressways?

A.

It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.

B.

It changes the calling and called number on a call.

C.

It changes the audio protocol used by a call through Expressways.

D.

It changes the audio codec used in a call through Expressways.

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asked 10/10/2024

Carlos Antonio Cardenas Lee

35 questions

User

Your answer: A B C D

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