300-820 Pre-Exam Practice Tests | (Updated 98 Questions)
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NEW QUESTION 28
What is the purpose of a transform in the Expressway server?
- A. A transform is used to route calls to a destination.
- B. A transform changes the audio codec when the call goes through the Expressway.
- C. A transform has the function as a neighbor zone in the Expressway. It creates a connection with another server.
- D. A transform changes an alias that matches certain criteria into another alias.
Answer: D
NEW QUESTION 29
What should an engineer use to create users for a Cisco Jabber Cloud Deployment?
- A. Cisco Unified IM and Presence Server
- B. Cisco UCM
- C. Cisco Webex Directory Connector
- D. Cisco Webex Administration Tool
Answer: D
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/12_6/cjab_b_cloud-and-hybrid-deploymentscisco-jabber-12-6/cjab_b_cloud-and-hybrid-deployments-cisco-jabber-12-6_chapter_0101.html
NEW QUESTION 30 
Refer to the exhibit. Which description of the transformation is true?
- A. It changes all patterns that begin with [email protected]:<port> to [email protected]
- B. It converts [email protected]:<port> to [email protected]
- C. It converts [email protected]:<port> to [email protected]
- D. It changes [email protected]:<port> to [email protected]
Answer: B
NEW QUESTION 31
Refer to the exhibit.
If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is busy, which media node does the Webex Teams device connect to next?
- A. Both Cloud Node US-EAST and US-WEST
- B. Cloud Node US-WEST
- C. Cloud Node US-EAST
- D. Video Mesh Cluster-2
Answer: D
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/videomesh/cmgt_b_webex-vid
NEW QUESTION 32
Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one major complication in implementing NAT ALG for voice and video devices?
- A. Internal endpoints cannot use addresses from the private address space.
- B. The NAT ALG cannot inspect the contents of encrypted signaling messages.
- C. Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.
- D. NAT ALG introduces jitter in the voice path.
Answer: B
Explanation:
Explanation
https://www.voipinfo.net/docs/cisco/collab11.pdf
NEW QUESTION 33
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. Expressway-E Cluster Name
- B. Webex CUSP Cluster Name
- C. Cisco Unified Communications Manager Publisher FQDN
- D. Expressway-C Cluster Name
Answer: D
NEW QUESTION 34
Refer to the exhibit.
In an environment SIP devices are registered to CUCM and H.323 devices to VCS. What would be required to enable these calls to setup correctly?
- A. Disable SIP in the external zone.
- B. Change the domain of SIP endpoint A to cisco.com.
- C. Create a presearch transform.
- D. Change the interworking mode to On.
Answer: D
NEW QUESTION 35
For a Mobile and Remote Access deployment, which server's certificate must include the Unified registration domain as a Subject Alternate Name?
- A. Expressway-C server certificate
- B. Cisco Unified Communications Manager server certificate
- C. Expressway-C and Expressway-E server certificate
- D. C.Expressway-E server certificate
Answer: D
NEW QUESTION 36
Refer to the exhibit.
When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?
- A. 13358 is sent directly to the traversal zone.
- B. 13358 is replaced by 135, and then is sent to the traversal zone.
- C. 13358 is replaced by 135, and then is sent to the local zone.
- D. 13358 is replaced by 135 and remains in the same zone.
Answer: B
NEW QUESTION 37
Which two types of information does Cisco Expressway back up? (Choose two.)
- A. security certificates
- B. IP addresses
- C. current call states
- D. call records
- E. log files
Answer: A,C
NEW QUESTION 38
When a Cisco Webex Video Mesh Node is configured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?
- A. a reachable Video Mesh Node and then overflows to the cloud, if needed
- B. the lowest STUN round-trip delay to each node and cloud
- C. the SIP delay header during call setup
- D. an HTTPS speed and latency test to each node and the cloud
Answer: A
NEW QUESTION 39
Which two items are configured when deploying a B2B collaboration solution? (Choose two.)
- A. search rules in Cisco Expressway-E
- B. DNS zone on a Cisco Expressway-C
- C. traversal client on a Cisco Expressway-E
- D. SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-E
- E. SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-C
Answer: A,E
NEW QUESTION 40
A company has enabled ICE to optimize call flows and improve video quality between their Cisco Collaboration endpoints internally and externally.
For which reason would you see activity on the TURN server when a call is established between two external endpoints?
- A. ICE cannot reduce the packet loss on the link
- B. A STUN cannot punch holes in the firewall
- C. The video call is using encryption, which is not supported by ICE with CUCM 12.5
- D. The video call is using 4K resolution, which is not supported by ICE with CUCM 12.5
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 41
A call is sent by Cisco UCM to Expressway with a URI of [email protected]. If (7508...)
@expc1a\.pod8\.test\.lab.* is the pattern string, what would be the replacement string of the transform in Expressway to re-write the call so that it becomes [email protected]?
- A. \1@conf\.pod8.test.lab.@
- B. \1@conf\.pod8\.test.lab.!
- C. \[email protected]\.test\.lab
- D. \1@conf\.pod8\.test\lab.*
Answer: C
NEW QUESTION 42
Refer to the exhibit.
When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?
- A. 13358 is replaced by 135, and then is sent to the local zone.
- B. 13358 is replaced by 135, and then is sent to the traversal zone.
- C. 13358 is sent directly to the traversal zone.
- D. 13358 is replaced by 135 and remains in the same zone.
Answer: C
NEW QUESTION 43
An external Jabber device cannot register. While troubleshooting this issue, the engineer discovers that privately signed certificates are being used on Expressway-C and Expressway-E What action will resolve this issue?
- A. The Jabber client must register to the Cisco UCM internally before it will register externally.
- B. The private CA certificate must be placed in the phone trust store.
- C. The device running the Jabber client must use a VPN to register.
- D. The device running the Jabber client must download and trust the private CA certificate.
Answer: D
NEW QUESTION 44
Refer to the exhibit.
While troubleshooting Cisco Jabber login issues, there are some error messages. Why is the Jabber client unable to sign in?
- A. down Cisco Unified Communications Manager server
- B. XMPP bind failures
- C. incorrect login credentials
- D. service discovery issues
Answer: B
NEW QUESTION 45
Which step is required when configuring Cisco Webex Hybrid Message Service?
- A. Register Expressway-C to Cisco Unified Communications Manager.
- B. Add Expressway-C and Cisco United CM to the Cisco Webex Cloud.
- C. Add Cisco Unity Connection to Expressway-E.
- D. Register Expressway-C Connector Hosts to the Cisco Webex Cloud.
Answer: D
NEW QUESTION 46
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