Implementing Cisco Collaboration Cloud and Edge Solutions Exam Questions

Here you have the best Cisco 300-820 practice exam questions.

Some things you may want to keep in mind about this practice exam questions:

You have 160 total questions to study from
Each page has 5 questions, making a total of 32 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on September 13, 2024

Question 1 of 160

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.

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.

D.

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

Correct Answer: C

In the context of SIP calls, NAT (Network Address Translation) can cause issues related to the IP address specified in the connection data field within the SDP (Session Description Protocol). If the client is behind a NAT, the IP address in the SDP might be a private, unrouteable internal address. This means that the receiving client will not be able to directly route packets back to the originating client, leading to communication failures.

Question 2 of 160

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

Correct Answer: C

To enable secure video communication with external partners and customers while ensuring security for the deployment and connectivity, Cisco Expressway-C and Cisco Expressway-E are required. Cisco Expressway-C is deployed inside the corporate network and Cisco Expressway-E is deployed in the DMZ (Demilitarized Zone). This setup allows for secure traversal of firewalls and NAT (Network Address Translation) devices, thus ensuring both connectivity and security for external video communication with the Cisco Unified Communications Manager.

Question 3 of 160

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

When an Expressway-E is configured for static NAT, the Session Description Protocol (SDP) c-line is modified to reflect the NAT address. The c-line specifies the connection information, including the IP address where media should be sent. If a device is behind a NAT, the c-line will be updated to show the public NAT address to ensure proper routing of media packets.

Question 4 of 160

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

Correct Answer: A

Interworking is the required functionality to enable communication between SIP and H.323 protocols. The company wants to register endpoints internally using SIP and communicate with external parties using SIP and H.323. Expressway-C is designed to handle interworking between SIP and H.323, facilitating communication between these different protocols. Therefore, enabling interworking in Expressway-C would be the correct approach.

Question 5 of 160

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

A.

You must have the Intercluster Sync Agent working across your IM and Presence clusters.

B.

You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.

C.

Your IM and Presence Service clusters must have Multiple Device Messaging disabled.

D.

AXL service should be activated only on the publisher of each IM and Presence cluster.

Correct Answer: A

For a Hybrid Message Service High Availability deployment with multiple IM and Presence clusters, it is essential to have the Intercluster Sync Agent working across all IM and Presence clusters. This configuration ensures that data is synchronized properly among the clusters, which is critical for maintaining high availability and consistent service.