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Cisco 300-820 Exam Syllabus Topics:

Section	Objectives
Security and Troubleshooting	- TLS/SRTP and secure signaling - Troubleshooting hybrid collaboration deployments
Collaboration Cloud Architecture	- Webex platform integration overview - Cisco Collaboration cloud and hybrid architecture concepts
Hybrid Collaboration Services	- Webex hybrid calling deployment - Calendar, directory, and media services integration
Cisco Expressway and Edge Services	- Mobile and Remote Access (MRA) - Expressway-C and Expressway-E deployment
Call Control and SIP Integration	- Cisco Unified Communications Manager (CUCM) integration - SIP trunking and call routing design

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Cisco Implementing Cisco Collaboration Hybrid and Cloud Technologies (CLHCT) v2.0 Sample Questions (Q145-Q150):

NEW QUESTION # 145
Refer to the exhibit showing logs from the Expressway-C, a copy of the Expressway-E certificate, and the UC traversal zone configuration for the Expressway-C.
An office administrator is deploying mobile and remote access and sees an issue with the UC traversal zone. The zone is showing "TLS negotiation failure". What is causing this issue?

A. The Expressway-E does not have the FQDN of Cisco UCM listed as a SAN in its certificate
B. The Expressway-E certificate includes the Expressway-C FQDN as a SAN entry
C. In the UC Traversal Zone on the Expressway-C, the peer address is set to the IP of the Expressway- E, which is not a SAN entry in the Expressway-E certificate
D. The Expressway-C is missing the FQDN of Cisco UCM in the Common Name of its certificate

Answer: C

Explanation:
Note that if you use an IP address (not recommended), that address must be present in the Expressway-E server certificate.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-0-
1/mra/exwy_b_mra-deployment-guide-x1401/exwy_m_basic-configuration.html

NEW QUESTION # 146
You must install an Expressway Edge server pair to enable mobile and remote access for a customer network. Which two requirements are used to install an MRA solution successfully?
(Choose two.)

A. Make sure that Expressway-Edge and Expressway-Core servers have their server certificates signed by the same certification authority and the CA certificate is uploaded to the trusted CA store otherwise the Traversal zone will not work.
B. You can deploy Edge servers with multiple network interfaces or with a single network interface.
In both scenarios, you must enable NAT for the Internet-facing interface if you are using private Ip addresses.
C. Configure DNS SRV records according. Make sure that you can resolve DNS SRV record_collab- edge_tls.yourdomain.com outside your company network.
Make sure that you cannot resolve it inside your company network.
D. Configure your firewalls to allow traffic from Expressway-Core to Expressway-Edge servers and to allow traffic from internet hosts to Expressway-Edge servers.
You do not need to configure firewall rules for traffic from Expressway-Edge to Expressway Core servers.

Answer: A,C

NEW QUESTION # 147
A remote branch office reports that Webex Board endpoints experience audio dropouts during active meetings, especially when file transfers occur simultaneously. WAN link utilization shows
95% usage during peak hours. Which two troubleshooting actions should be taken first? (Choose two.)

A. Verify that audio RTP streams are marked with DSCP EF end-to-end.
B. Apply WAN optimization appliances to compress all traffic, which reduces utilization.
C. Use packet captures to confirm whether Webex RTP packets are being queued in the correct QoS class.
D. Validate that the WAN QoS policy contains a low-latency queue for voice traffic.
E. Increase the MTU size on the WAN interface to allow larger packets.

Answer: A,D

Explanation:
Webex audio dropouts during high WAN utilization indicate that real-time voice media may not be receiving proper QoS treatment. Audio RTP should be marked DSCP EF end-to-end and placed into a low-latency queue so voice traffic is prioritized during congestion.

NEW QUESTION # 148
A multinational company sets up an Auto Attendant that supports multiple languages based on caller locale. However, callers from France receive English prompts instead of French. Which configuration must be reviewed to resolve the issue?

A. Check the Auto Attendant language selection rules and confirm that French is assigned to French- speaking caller locales.
B. Confirm that the directory synchronization includes user language attributes.
C. Check if the Auto Attendant is registered as a voicemail pilot number.
D. Verify the Multi-Language listing SIP trunk settings.

Answer: A

Explanation:
Auto Attendant prompt language is controlled by its language settings and rules. To present French prompts to callers from France, the Auto Attendant must have French correctly assigned for the relevant French-speaking caller locale.

NEW QUESTION # 149
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 remains in the same zone.
B. 13358 is replaced by 135, and then is sent to the local zone.
C. 13358 is replaced by 135, and then is sent to the traversal zone.
D. 13358 is sent directly to the traversal zone.

Answer: C

NEW QUESTION # 150
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