Cisco CCNP 300-820 Questions & Answers

• Question 11:

  What is the first step to restoring an Expressway cluster from a backup?

  A. use the backup that is specific to each Expressway peer in the cluster

  B. upgrade each Expressway peer to the latest Expressway software

  C. remove each Expressway peer from the cluster

  D. add all the Expressway peers to the cluster

  Correct Answer: C

  To restore a backup, you need to take the Cisco Expressway unit out of service before doing a restore. If you are doing a restore on a clustered Cisco Expressway, you need to first remove it from the cluster. You cannot restore a backup on a node that is still a member of a cluster. Use a standalone Cisco Expressway to restore it to a previous configuration of system data.

• Question 12:

  An administrator installs a new webserver (server1.example.com ?10.1.1.90) for storing Cisco Jabber update files to the network, but all Mobile and Remote Access registered clients still run the old Jabber software version, and the update fails. Which configuration task on an Expressway server solves the Jabber software update issue?

  A. Add a rule with the URL http://server1.example.com:80/ to the outbound HTTP allow list manually to allow pushing the new software to the clients.

  B. Add a rule with the URL http://server1.example.com:80/ to the inbound HTTP allow list manually to allow access to the new web server.

  C. Add a rule with the server IP address 10.1.1.90 in the URL to the inbound HTTP allow list because server names and FQDNs are not supported.

  D. Run an IM and Presence server discovery process on Expressway-C to add the new web server to the inbound HTTP allow list automatically.

  Correct Answer: B

• Question 13:

  Cisco Expressways are being deployed for Mobile and Remote Access. The Expressway-E internal interface (LAN1) IP is 192.168.100.10/24, and the external interface (LAN2) IP is 172.16.100.10/24. The Expressway-C IP is 192.168.20.10/24. The default gateway for each subnet is the rst useable address. How must the Expressway-E be configured to allow proper routing to the internal and external networks?

  A. IPv4 gateway: 172.16.100.1, and a static route for the 192.168.100.0/24 subnet using LAN1

  B. IPv4 gateway: 192.168.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1

  C. IPv4 gateway: 192.168.100.1, and a static route for the 172.16.100.0/24 subnet using LAN2

  D. IP v4 gateway: 172.16.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1

  Correct Answer: D

• Question 14:

  An administrator is enabling Mobile and Remote Access login for the Cisco UCM registration domain cisco.com. Phones are registered with a Cisco UCM phone security profile name of securephone.cisco.com. Which two subject alternative names must be configured? (Choose two.)

  A. Securephone.cisco.com on the CallManager certificate

  B. cisco.com on the Expressway-C certificate

  C. Securephone.cisco.com on the Expressway-E certificate

  D. cisco.com on the Expressway-E certificate

  E. Securephone.cisco.com on the Expressway-C certificate

  Correct Answer: DE

  https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/exwy_b_certificate-creation-use-deployment- guide/exwy_b_certificate-creation-use-deployment-guide_chapter_011.html

• Question 15:

  An administrator configures a secure SIP trunk in Cisco UCM to Expressway-C. The SIP trunk fails to become active, and an examination of a packet capture finds that the TLS handshake failed with a "certificate Unknown" error from Cisco UCM. To allow the Cisco UCM to trust the Expressway-C and establish a TLS connection, the administrator will upload the Expressway server certificate to the trust store. To which trust store must the certificate be uploaded?

  A. tomcat-trust

  B. CallManager-trust

  C. TVS-trust

  D. ipsec-trust

  Correct Answer: B

  https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-1/Cisco-Expressway-SIP-Trunk-to-Unified-CM- Deployment-Guide-CUCM-8-9-and-X8-1.pdf

• Question 16:

  

  Refer to the exhibit. An administrator troubleshoots Cisco Jabber users experiencing issues when trying to log in and notices errors in the Jabber problem report log. The administrator also sees that the Intercluster Sync Agent service is not running on the IMM and Presence server. Why is the Jabber client unable to sign in?

  A. The XmppSDK.dl file is missing from the IM and Presence server

  B. The XMPP stanza is not using the correct ID for the Jabber client.

  C. The XMPP bind failed on the IM and Presence server

  D. The Jabber client refused the XMPP bind connection.

  Correct Answer: C

  https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-5/Mobile-Remote-Access-via-Expressway-Deployment- Guide-X8-5-1.pdf

• Question 17:

  Which interworking option must be used on the Expressway for it to act as a SIP/H.323 gateway when no endpoint is registered?

  A. enabled

  B. registered only

  C. off

  D. on

  Correct Answer: D

  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_protocols.html

• Question 18:

  Which protocol and port are used for signaling between on-premises Cisco Webex Video Mesh Nodes and Cloud Media Services?

  A. standard SIP over TCP port 5060

  B. signaling over HTTPS TCP port 443

  C. standard SIP TLS over TCP port 5061

  D. signaling over TCP port 444

  Correct Answer: D

• Question 19:

  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

  Correct Answer: C

• Question 20:

  An engineer learns from an end user that calls from outside the company are not being received. Calls are being made to other businesses outside of the company on video using URL addresses. The change management log shows no changes in the configuration of the collaboration solutions. The engineer examines the endpoint, which seems to be registered to the Cisco UCM, and the SIP trunk between the Cisco UCM and sees that the Expressway is also up. In addition, the traversal link shows no errors between the Expressways. Which action must the engineer take to troubleshoot this issue?

  A. On the Cisco UCM, run the Real-Time Monitoring Tool to see if any incoming calls fail.

  B. On the Expressway-E, run diagnostic logging under maintenance to see if any requests reach the system.

  C. On the Expressway-E, check the NTP settings to ensure that TLS will be able to terminate. If the clock is out of sync, incoming calls from other working systems would work bur not outgoing calls from the company.

  D. On the Expressway-C, run a network log under administrative tools to see if any requests reach the system.

  Correct Answer: B