Cisco 300-820 Online Practice Questions and Exam Preparation

Cisco 300-820 Online Questions & Answers

• Question 101:

  Jabber cannot log in via Mobile and Remote Access. You inspect Expressway-C logs and see this error message:

  XCP_JABBERD Detail="Unable to connect to host '%IP%', port 7400:(111) Connection refused"

  Which is the cause of this issue?

  A. Rich Media Session licenses are not activated on Expressway-E.
  B. Expressway-E is listening on the wrong IP interface.
  C. The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C.
  D. The XCP Service is not activated on Expressway-E.
  B. Expressway-E is listening on the wrong IP interface.

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  Explanation Explanation/Reference:If Expressway-E Network Interface Controller (NIC) is incorrectly configured, this can cause the Extensible Communications Platform (XCP) server to not be updated. https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/118798-technote-cucm-00.html#anc9

• Question 102:

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

  A. call records
  B. log files
  C. IP addresses
  D. current call states
  E. security certificates
  A. call records
  E. security certificates

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  The data saved to a backup file includes: Bootstrap key (from X8.11) System configuration settings Clustering configuration Local authentication data (but not Active Directory credentials for remotely managed accounts) User account and password details Server security certificate and private key Call detail records (if the CDR service on Expressway is enabled) https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-10/Mobile-Remote-Access-via-Expressway-Deployment-Guide-X8-10.pdf

• Question 103:

  A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.

  Which statement is true?

  A. Webex Cloud supports either a DMZ-based Mesh Node for security or an internal-based Mesh Node for media control only.
  B. Installing a Video Mesh Node in the DMZ requires you to open TCP and UDP port 4444 in your internal firewall for full clustering functionality.
  C. Installing a Video Mesh Node in the DMZ requires the external firewall to allow UDP traffic from ANY port to the address of the Video Mesh Nodes via port 5004.
  D. Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams clients. A DMZ node is added for extra security.
  C. Installing a Video Mesh Node in the DMZ requires the external firewall to allow UDP traffic from ANY port to the address of the Video Mesh Nodes via port 5004.

• Question 104:

  Refer to the exhibit.

  

  An engineer is configuring Cisco Expressway-C to discover Cisco UCM by using an IP address and a TCP connection. After the configuration is saved, errors occur.

  Which two changes must be made to resolve the errors? (Choose two.)

  A. Configure an application user with Cisco Computer Telephony Integration-enabled privileges in Cisco UCM.
  B. Configure an application user with Administrative XML privileges in Cisco UCM.
  C. Upload a valid Cisco Tomcat certificate from the Cisco UCM to Expressway-C.
  D. Set TLS verify mode to Off.
  E. Configure an HTTP allow list that contains the Cisco UCM
  B. Configure an application user with Administrative XML privileges in Cisco UCM.
  D. Set TLS verify mode to Off.

• Question 105:

  When external video endpoints are called via a DNS zone, which dialing method requires DNS to be configured in the Expressway server?

  A. IP dialing
  B. URI dialing
  C. DN dialing
  D. E.164
  B. URI dialing

• Question 106:

  Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?

  A. Cisco Unified CM is always used for meeting capabilities.
  B. Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.
  C. Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.
  D. Cisco Webex Meeting Center is always used for meeting capabilities.
  D. Cisco Webex Meeting Center is always used for meeting capabilities.

• Question 107:

  A collaboration engineer is configuring Cisco Webex Edge for video conferencing devices to provide support for Cisco Webex Control Hub configuration management. Which configuration control mode must be set on Cisco UCM for Control Hub to manage the on-premises device configuration?

  A. Webex Edge only
  B. endpoing only
  C. Cisco UCM and endpoint
  D. Cisco UCM only
  D. Cisco UCM only

• Question 108:

  A company decided to gradually move to the Cisco Webex Cloud from a Cisco on- premises solution. One step is to configure a Cisco Hybrid Services connector.

  Where must an engineer make this configuration?

  A. Deploy the Cisco Hybrid Services connector, which is an on-premises node, to allow for multiple Cisco collaboration environments to connect to Cisco Webex.
  B. Configure Hybrid Service in the Cisco Expressway-E in the DMZ to connect to the Cisco Webex Cloud.
  C. Configure Hybrid Services in Cisco Webex Control Hub in the Cisco Webex Cloud to enable Hybrid Services.
  D. Enable the Hybrid Services service on the Cisco UCM to allow the on-premises call control to establish a hybrid link to the Cisco Webex Cloud.
  C. Configure Hybrid Services in Cisco Webex Control Hub in the Cisco Webex Cloud to enable Hybrid Services.

• Question 109:

  Which two scenarios need a proper DNS configuration on Expressway servers? (Choose two.)

  A. Expressway servers verify the common name attribute in server certificates.
  B. Expressway servers route calls based on SIP URI.
  C. Admins avoid IP address configuration for neighbor zone peers.
  D. Expressway servers use NTP peer authentication for secure time updates.
  E. Admins download software updates from the Cisco website via WebUI.
  B. Expressway servers route calls based on SIP URI.
  C. Admins avoid IP address configuration for neighbor zone peers.

• Question 110:

  Cisco Collaboration deployment has video endpoints that can do B2B calls over the internet, but they also can make audio calls through a gateway. This ability means that someone from the internet can make fraud calls through the system. Which action must an engineer take to set up the search rules for calls that are being headed to the PSTN gateway?

  A. Ensure that only requests that are authenticated are allowed to make a PSTN call.
  B. Avoid using any wild card in the source settings in the search rules.
  C. Add registered devices only in the search rule for the PSTN gateway.
  D. Add registered devices only in the zone for the PSTN gateway.
  B. Avoid using any wild card in the source settings in the search rules.

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  Explanation Explanation/Reference:https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X14-0/exwy_b_cisco-expressway-administrator- guide/exwy_m_dial-plan-and-call-processing.html