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Cisco 300-820 Exam Syllabus Topics:

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

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Cisco Implementing Cisco Collaboration Hybrid and Cloud Technologies (CLHCT) v2.0 Sample Questions (Q223-Q228):

NEW QUESTION # 223
Which two types of information does Cisco Expressway back up? (Choose two.)

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

Answer: A,D

Explanation:
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/admin_guide/Cisco- Expressway-Administrator-Guide-X8-11-4.pdf

NEW QUESTION # 224
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. Add registered devices only in the search rule for the PSTN gateway.
B. Avoid using any wild card in the source settings in the search rules.
C. Add registered devices only in the zone for the PSTN gateway.
D. Ensure that only requests that are authenticated are allowed to make a PSTN call.

Answer: B

NEW QUESTION # 225
Refer to the exhibit.

Refer to the exhibit. What are "Type" field values for this Expressway servers zone configuration?

A. Expressway-C "Neighbor'. Expressway-E 'Neighbor'
B. Expressway-C Traversal client", Expressway-E Traversal server'
C. Expressway-C Traversal server', Expressway-E Traversal client*
D. Expressway-C "DNS", Expressway-E Traversal server'

Answer: B

NEW QUESTION # 226
A company identifies a fraudulent toil situation. An engineer reviews the Cisco UCM call detail records and discovers that fraudulent calls originate from a Cisco Expressway-C server and are then routed to a 10-digit PSTN number. What must be configured to limit incoming Expressway calls to the internal Cisco UCM range of extensions 5XXXX?

A. call policy rule from the DNS zone to allow a destination regex pattern of \d.*@abc.com
B. calling search space that contains all the partitions on the Unified Communications Manager SIP trunk to Expressway
C. unique search rule with a regex pattern of [5]\d{4}@abc.com that targets the neighbor zone
D. call policy rule from the DNS zone to allow a destination regex pattern of .*@abc.com

Answer: B

Explanation:
To prevent toll fraud and restrict what calls Cisco UCM will accept from Expressway, the control must be enforced on Cisco UCM, not on Expressway search or call policy rules. By configuring a Calling Search Space (CSS) on the UCM SIP trunk from Expressway that includes only the partition containing internal extensions (5XXXX), UCM will reject any calls from Expressway attempting to reach PSTN or other unauthorized destinations. This is the correct and recommended method to limit inbound Expressway calls to a specific internal extension range and stop fraudulent PSTN routing.

NEW QUESTION # 227
An engineer attempts to upload a server certificate to an Expressway-C server but receives an error when they click the upload button that says that the file is invalid. The engineer is advised that this happens because the certificate was signed incorrectly and is missing an attribute. What must the engineer do to upload the certificate?

A. Create a certificate request via the Certificate Services Web Page and ensure that the Subject Common Name field contains the server FQDN and all Cisco Unified CM phone security profile names.
B. Create a certificate request via Certificate Services Web Page and ensure that the certificate validity period is five years because the Expressway server validates this during certificate import.
C. Create a new certificate template with "Server authentication" and "Client authentication" enabled and use this template when signing the Expressway server certificate.
D. Create a new certificate template with the certificate attribute "Allow private key to be exported" enabled and use this template when signing the Expressway server certificate.

Answer: C

Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X15-
0/mra/exwy_b_mra-deployment-guide-x150.pdf

NEW QUESTION # 228
......

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