Cisco 300-820 Online Practice Questions and Exam Preparation

Cisco 300-820 Online Questions & Answers

• Question 31:

  Refer to the exhibit.

  

  An engineer must configure a B2B traversal zone. Trusted certification authority and server certificates are uploaded to Cisco Expressway-C and Expressway-E servers. After the traversal zone configuration is completed in Expressway-C, the error message in the exhibit appears. What are the two reasons for the error? (Choose two.)

  A. The peer 1 address in Expressway-C must be replaced by the FQDN of Expressway-C.
  B. The peer 1 address in Expressway-C is not the FADN of Expressway-E.
  C. The communication port is not set to 7001.
  D. The FQDN of Expressway-E cannot be resolved by the DNS server.
  E. The traversal zone TLS verify subject name in Expressway-E does not match the FQDN of Expressway-C.
  B. The peer 1 address in Expressway-C is not the FADN of Expressway-E.
  E. The traversal zone TLS verify subject name in Expressway-E does not match the FQDN of Expressway-C.

• Question 32:

  Which option mandates that calls fall back to unencrypted media if encryption cannot be established?

  A. auto
  B. force unencrypted
  C. best effort
  D. force encrypted
  C. best effort

• Question 33:

  When determining why Mobile and Remote Access to Cisco TelePresence equipment does not work anymore for an organization. There are several administrators and configuration changes could have happened without anyone knowing. Internal communication seems to be working, but no external system can register or call anywhere. Gathering symptoms, you also discover that no internal systems can call out either.

  What is TraversalZone missing that causes this issue?

  A. link to the DefaultZone
  B. pipe to the DefaultZone
  C. SIP trunk to the DefaultZone D. route pattern to the DefaultZone
  A. link to the DefaultZone

• Question 34:

  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?

  A. Interworking in Expressway-C
  B. Transcoding in Cisco Unified Communications Manager
  C. Transcoding in Expressway-C
  D. Interworking in Cisco Unified Communications Manager
  A. Interworking in Expressway-C

• Question 35:

  Refer to the exhibit.

  

  Which two numbers match the regular expression? (Choose two.)

  A. d20d16d20d22
  B. 2091652010224
  C. 209165200225
  D. d209d165d200d224
  E. 209165200224
  C. 209165200225
  E. 209165200224

• Question 36:

  After an engineer implements load balancing in the Cisco CMS cluster, they observe that shortly after the second Call Bridge is added to the cluster, calls into a space randomly disconnect when the calls are from endpoints registered with Cisco UCM. Which action resolves the issue?

  A. Enable "Accept Out-of-dialog REFER" on the SIP Trunk security profile.
  B. Enable "Accept Unsolicited Notification" on the SIP Trunk security profile.
  C. Enable "Accept Presence Subscription" on the SIP Trunk security profile on Cisco UCM.
  D. Enable "Accept Replaces Header" on the SIP Trunk security profile on Cisco UCM.
  D. Enable "Accept Replaces Header" on the SIP Trunk security profile on Cisco UCM.

• Question 37:

  An administrator has been asked to configure Video Mesh signaling traffic to route through a proxy. Which is an available proxy type in the Video Mesh node configuration to support this deployment model?

  A. Transparent Explicit Proxy
  B. Transparent Inspecting Proxy
  C. Reverse Proxy
  D. Distorting Proxy
  B. Transparent Inspecting Proxy

• Question 38:

  Refer to the exhibit. An engineer is deploying mobile and remote access in an environment that already had functioning Business to Business calling. Mobile and remote access SIP registrations are failing. To troubleshoot, SIP logs were collected. How is this issue resolved?

  

  A. Change the SIP profile on the SIP trunk for the Expressway-E to Standard SIP Profile for TelePresence Endpoint
  B. Change the "Incoming Port" in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations
  C. Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service
  D. Write a custom normalization script since the "vcs-interop" normalization script does not allow registrations
  B. Change the "Incoming Port" in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations

• Question 39:

  Refer to the exhibit.

  

  After hardening the Cisco Expressway, an engineer noticed this error in the logs HTTP error 429 "Too Many Requests," and users report that authentication is not possible on more than two devices. What must the engineer increase to correct the issue?

  A. maximum authorizations per period
  B. credentials refresh interval
  C. rate control period
  D. credentials cleanup interval
  A. maximum authorizations per period

• Question 40:

  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?

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