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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 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?
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?
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 1 - 300-820 discussion

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

A.

Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.

Answers
A.

Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.

B.

When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.

Answers
B.

When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.

C.

The IP address specified in the connection data field may be an unrouteable internal address.

Answers
C.

The IP address specified in the connection data field may be an unrouteable internal address.

D.

The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

Answers
D.

The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

Suggested answer: D
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asked 10/10/2024
henk Bouman
33 questions
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