Free Implementing Cisco Collaboration Cloud and Edge Solutions Exam 300-820 Exam Practice Test

Which two licenses are required for the Expressway B2B feature to work? (Choose two)

• Traversal Server
• Advanced Networking
• Device Provisioning
• Rich Media Sessions
• TURN Relays

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

• Voice calls use Webex Calling platform for call control and use hybrid media nodes for local conferencing.
• Voice calls use local media nodes to keep traffic internal for internal traffic and use Webex Calling for external calls.
• Voice call use Cisco Unified Communications Manager for local calls and Webex Calling for external calls.
• Voice calls use local Cisco Unified Communications Manager for all calls.

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

• Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.
• When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.
• The IP address specified in the connection data field may be an unrouteable internal address.
• The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

Which two types of information does Cisco Expressway back up? (Choose two.)

• call records
• log files
• IP addresses
• current call states
• security certificates

Which mode should be used when Call Policy is configured on Expressways?

• extended CPL
• local CPL, policy service, and off
• on
• remote CPL

What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

• ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
• ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
• ICE uses FAST updates to optimize the video quality in case of packet loss. This technology is available only from Cisco Unified CM version 11.5 and later.
• ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.

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

• The MRA license is missing on the Expressway-E.
• The Unified Communications zone is down.
• Transform is not configured on Expressway-E.
• The SRV record for _cisco-uds is misconfigured.
• The firewall is blocking the port.

Which zone is required on a B2B deployment between Expressway-C and Expressway-E?

• traversal zone
• DNS zone
• default zone
• neighbor zone

Which two statements about Mobile and Remote Access certificate are true? (Choose two.)

• Expressway Core can use private CA signed certificate.
• You must upload the root certificates in the phone trust store.
• Expressway must generate certificate signing request.
• Expressway Edge must use public CA signed certificate.
• The Jabber client can work with public or private CA signed certificate.

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

• Internal endpoints cannot use addresses from the private address space.
• The NAT ALG cannot inspect the contents of encrypted signaling messages.
• NAT ALG introduces jitter in the voice path.
• Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.