300-820 Free Practice Test

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

1. A. Internal endpoints cannot use addresses from the private address space.
2. B. The NAT ALG cannot inspect the contents of encrypted signaling messages.
3. C. NAT ALG introduces jitter in the voice path.
4. D. Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.

Correct Answer: B

A Jabber user is being prompted to trust the Expressway-E certificate when using Mobile and Remote Access. The administrator has validated that the Expressway-E certificate is being trusted by the machine running the Jabber client.
What else can be done to solve this problem?

1. A. Create a new CSR with new information on the SAN field.
2. B. Include Cisco Unified Communications Manager registration domain in the Expressway-E certificate as a SAN.
3. C. Change the domain name.
4. D. Change the FQDN of the Expressway.

Correct Answer: B

An organization wants to enable a Cisco Webex connector to synchronize all employees automatically with Cisco Webex instead of using a manual list. Where is the Webex Hybrid Directory Service configured?

1. A. Install Cisco Directory Connector on a Microsoft Windows Domain server and configure the software and Webex Control Hub.
2. B. Enable the directory service in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub.
3. C. Enable the directory service on Cisco Expressway Edge for Office 365 or Cisco Expressway Core for internal Active Directory and add the service in Webex Control Hub.
4. D. Install the Cisco Express Connector and configure the device in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub.

Correct Answer: A

With QoS enabled, which two statements about the Cisco Webex Video Mesh Node signaling and media traffic are true? (Choose two.)

1. A. From VMN to CUCM SIP endpoints, the source UDP ports from 52500 to 62999 is used for audio traffic.
2. B. From VMN to Webex Teams clients, the source UDP port 5004 is used for video traffic.
3. C. From Webex cloud to VMN, the source UDP port 9000 is used for audio traffic.
4. D. From VMN to video endpoints, the destination UDP port 5004 is used for audio traffic.
5. E. From VMN to Webex cloud, the destination UDP port 9000 is used for video traffic.

Correct Answer: AB

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?

1. A. Interworking in Expressway-C
2. B. Transcoding in Cisco Unified Communications Manager
3. C. Transcoding in Expressway-C
4. D. Interworking in Cisco Unified Communications Manager

Correct Answer: B