300-820 Online Practice Questions and Answers

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.)

A. Export a CSV list of users in the Cisco Webex Control Hub, set the Hybrid Calendar Service to TRUE for users to be enabled, then import the file back to Manage Users menu in the Cisco Webex Control Hub.

B. Set up an Auto-Assign template that enables Hybrid Calendar.

C. Select the Hybrid Services settings card in the Cisco Webex Control Hub and import a User Status report that contains only users to be enabled.

D. On the Users tab in the Cisco Webex Control Hub, check the box next to each user who should be enabled, then click the toggle for the Hybrid Calendar service to turn it on.

E. From Cisco Webex Control Hub, verify the domain that your Hybrid Calendar users will use, which automatically activates them for the service.

Refer to the exhibit.

When a Jabber user attempts to connect from outside of the organization, the user enters the login information as "[email protected]" and receives the error "Cannot find your services Automatically". The engineer tries to resolve SRV

records used by Jabber.

DNS A record "expressway-e.example.com" points to the Expressway-E IP and "cucm.example.com" points to the Cisco Unified Communications Manager.

Which change resolves the DNS problem?

A. Change cisco-uds to point to the Expressway-E FQDN.

B. Change the collab-edge record to point to 5061.

C. Remove the cisco-uds SRV record for the external DNS.

D. Change the priority of the SRV record for cisco-uds.

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

A. Expressway Core can use private CA signed certificate.

B. You must upload the root certificates in the phone trust store.

C. Expressway must generate certificate signing request.

D. Expressway Edge must use public CA signed certificate.

E. The Jabber client can work with public or private CA signed certificate.

Refer to the exhibit. Logins and failing via mobile and remote access. How is this resolved?

A. Mobile and remote access login has not been enabled for the domain configured in the Expressway-C. The domain must be edited to allow Cisco UCM registrations.

B. SIP is disabled on the Expressway-E. The SIP protocol must be enabled on the server.

C. No Cisco UCM servers are configured in the Expressway-C. Servers must be added for CallManager and IM and Presence services.

D. Although a traversal client zone exists, there is no Unified Communications traversal client zone. One must be created.

When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

A. Webex CUSP Cluster Name

B. Expressway-E Cluster Name

C. Cisco Unified Communications Manager Publisher FQDN

D. Expressway-C Cluster Name

What allows endpoints behind a NAT to discover the paths through which they will pass media?

A. RTP

B. TLS

C. SNMP

D. ICE

Which step is required when configuring Cisco Webex Hybrid Message Service?

A. Add Expressway-C and Cisco UCM to the Cisco Webex Cloud.

B. Register Expressway-C Connector Hosts to the Cisco Webex Cloud.

C. Add Cisco Unity Connection to Expressway-E.

D. Register Expressway-C to Cisco UCM.

An engineer must fix broken SSH tunnels between Expressway-C (192.168.10.5) and Expressway-E (192.168.20.5). The engineer is advised that the packet capture shows the required packets for the SSH tunnels leaving the Expressway-C but not reaching the Expressway-E. Which firewall configuration must the engineer allow to resolve this issue?

A. port 2222 from Expressway-E to Expressway-C

B. port 7001 from Expressway-C to Expressway-E

C. port 7001 from Expressway-E to Expressway-C

D. port 2222 from Expressway-C to Expressway-E

Which two internal SIP endpoints behind a firewall place calls to external devices? (Choose two.)

A. An Expressway-C communicates with the internal endpoint and forwards the media to and from an Expressway-E.

B. A Cisco Endpoint is configured with a publicly routable static NAT SIP address to advertise instead of is private IP address.

C. An Expressway-C communicates directly with the remote party using the ICE protocol

D. An Expressway-E is used as a VPN server to allow remote SIP edge servers to connect calls

E. An Expressway-C rewrites the SIP SDP to advertise its own IP address to the external party.

An engineer is investigating failing incoming calls that are expected to connect. The engineer notices that the failed calls all have a port number of 5060 at the end of the URI. The search rules are configured in a way that they do not expect a port to be included. Which configuration allows the routing of this call?

A. * transform with a pattern string of *(.*)@example.com(:5060)?"

* replace a suing of \[email protected]

B. * search rule with a pattern string of "(.*)@example.com(:5050)?"

* replace a string of \1\2@example com

C. search rule with a pattern string of "(.*)@example.com(:5060)?"

* replace a string of \[email protected]\2

D. * transform with a pattern string of "(.*)@example.com(:5060)?"

* replace a string of \[email protected]\2

An engineer is supporting an existing Cisco Collaboration deployment that has internal and external home users using the solution without VPN. Business usage also includes B2B calling for voice and video. Suddenly the engineer receives a report that one of the home office users cannot use the Cisco Jabber client, and shortly after, a few more reports come in for the same error. What must the engineer check first to resolve this issue?

A. client logs of the users

B. real-time monitoring toll logs for problems

C. alarms on the Cisco Expressways

D. alarms on the Cisco UCM Cluster

An administrator is configuring a new Cisco Webex Hybrid Message Service deployment, and the Expressway-C Message Connector is successfully registered in the Control Hub. After the server information of the IM and Presence server is

added to the Expressway-C, an error "Connectivity to IM and Presence AXL Service could not be established" is displayed in the Control Hub. The Cisco AXL Web Service is enabled on the IM and Presence Service publisher, and the main

administrator account enabled for AXL API permission is being used.

Which configuration change must be made to resolve this error?

A. Enable the Cisco AXL Web Service on the Control Hub

B. Enable the Cisco AXL Web Service on the Expressway-C Message Connector

C. Enable an End User account for AXL.API permissions on the IM and Presence Service publisher

D. Enable a second administrator account for AXL API permissions on the IM and Presence Service publisher

How do the Cisco Expressway-C and Expressway-E servers transmit media to each other?

A. RTP and RTCP are multiplexed for all internal and external video endpoints across the traversal link using UDP.

B. When the Expressway-C receives RTP and RTCP media, it establishes a new UDP socket with the Expressway-E.

C. RTP and RTCP are multiplexed for all internal and external video endpoints across the traversal link using TLS.

D. When the Expressway-E receives RTP and RTCP media, it establishes a new UDP socket with the Expressway-C.

What is a description of an Interactive Connectivity Establishment?

A. It is used by B2BUA to keep the firewall ports opened for inbound/outbound calls.

B. It allows Mobile and Remote Access endpoints to connect video calls signaling peer-to-peer.

C. It allows calling external endpoints with reduced overhead under VPN connections.

D. It is used to find the best media path between network elements in traversal calls.

What is the default DSCP value for video traffic that is routed through an Expressway server?

A. 36

B. 24

C. 0

D. 34