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Free Cisco 300-820 CLHCT Practice Questions 2026 Part3

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Question #1
Which media encryption mode can be configured on an Expressway zone?
A. Advanced Encryption Standard
B. IPsec
C. Triple Data Encryption Standard
D. force unencrypted
View answer
Correct Answer: A

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Question #2
An organization with a domain name of example.com.Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)
A. _sips
B. _sips
C. _h323ls
D. _h323ls
E. _collab-edge
F. Reveal Answer
View answer
Correct Answer: AC
Question #3
What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?
A. You must have the Intercluster Sync Agent working across your IM and Presence clusters
B. You must have the Intercluster Lookup Service working across all of your IM and Presence clusters
C. Your IM and Presence Service clusters must have Multiple Device Messaging disabled
D. AXL service should be activated only on the publisher of each IM and Presence cluster
View answer
Correct Answer: A
Question #4
An engineer reviews the configuration of a pair of Expressway servers for a company with the domain example.com. The company allows toll fraud calls to reach the Cisco UCM only when it expects externally registered devices to call internal 5-digit extensions. The search history shows that the fraudulent calls have a destination URI of 8 or more digits and several domains. What must the engineer configure to prevent all toll fraud calls from going past the Expressway-E to the internal network?
A. search rules to only route calls with a destination URI of 5 to 8 digits long on the Expressway-E
B. CPL that blocks calls with a destination domain other than example
C. search rules to only route calls with a destination domain ofexample
D. CPL to block calls with a destination URI with 8 or more digits on the Expressway-E
View answer
Correct Answer: D
Question #5
An organization with a domain name of example.com.Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)
A. _sips
B. _sips
C. _h323ls
D. _h323ls
E. _collab-edge
View answer
Correct Answer: AC
Question #6
Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
A. Off
B. Best Effort
C. Auto
D. Force Encrypted
View answer
Correct Answer: A
Question #7
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
A. STUN
B. RTP
C. SNMP
D. TURN
View answer
Correct Answer: A
Question #8
Jabber cannot log in via Mobile and Remote Access. You inspect Expressway-C logs and see this error message:XCP_JABBERD Detail='Unable to connect to host '%IP%', port 7400:(111) Connection refused'Which is the cause of this issue?
A. Rich Media Session licenses are not activated on Expressway-E
B. Expressway-E is listening on the wrong IP interface
C. The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C
D. The XCP Service is not activated on Expressway-E
E. Reveal Answer
View answer
Correct Answer: B
Question #9
Which attribute in the SDP for a call is affected by the static NAT address configuration in an Expressway-E?
A. connection
B. name
C. version
D. bandwidth
View answer
Correct Answer: B
Question #10
Which zone is required on a B2B deployment between Expressway-C and Expressway-E?
A. raversal zone
B. NS zone
C. efault zone
D. eighbor zone
View answer
Correct Answer: A
Question #11
Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints. How does the Expressway-C and Expressway-E communicate?
A. Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint
B. Internal endpoints are registered to Expressway-E in the DMZ
C. Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint
D. Internal endpoints are registered to Expressway-C in the DMZ
View answer
Correct Answer: A
Question #12
Which role does Call Policy play when preventing toll fraud on Expressways?
A. It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination
B. It changes the calling and called number on a call
C. It changes the audio protocol used by a call through Expressways
D. It changes the audio codec used in a call through Expressways
View answer
Correct Answer: A
Question #13
Refer to the exhibit. A collaboration engineer creates an allow list test file for a Mobile and Remote Access deployment. Which lines are needed to format the test in the file correctly?
A. ttps://myServer:8443/myPath
B. block test:https:8443:GET "myServer/myPath":my deployment:block
C. block test,https:8443,GET "myServer/myPath",my deployment:block
D. my deployment", block, GET https://myServer:8443/myPath, "a block test"
View answer
Correct Answer: A
Question #14
Which two licenses are required for the Expressway B2B feature to work? (Choose two)
A. Traversal Server
B. Advanced Networking
C. Device Provisioning
D. Rich Media Sessions
E. TURN Relays
F. Reveal Answer
View answer
Correct Answer: AD
Question #15
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
A. STUN
B. RTP
C. SNMP
D. TURN
View answer
Correct Answer: A
Question #16
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
A. call routing
B. traversal subzone
C. call policy
D. search rule
View answer
Correct Answer: A
Question #17
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
A. STUN
B. RTP
C. SNMP
D. TURN
View answer
Correct Answer: A
Question #18
Which statement about scheduling Expressway backups is true?
A. It is not supported on the application
B. It is allowed from the application CLI of the Expressway only
C. It is allowed from the application CLI and GUI of the Expressway
D. It is allowed from the application GUI of the Expressway only
View answer
Correct Answer: C
Question #19
Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
A. Off
B. Best Effort
C. Auto
D. Force Encrypted
View answer
Correct Answer: A
Question #20
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
A. call routing
B. traversal subzone
C. call policy
D. search rule
View answer
Correct Answer: A
Question #21
A company already has a Cisco Unified Communications Manager for internal audio and video traffic, but it requires video communication with external partners and customers. It is important to ensure security for the deployment and the connectivity.What must be set up to enable this requirement?
A. Cisco Unified Border Element and Cisco ASA Firewall
B. Cisco Unified Border Element and Cisco Firepower Firewall
C. Cisco Expressway-C and Cisco Expressway-E
D. Cisco Expressway-C and Cisco Unified Border Element
View answer
Correct Answer: C
Question #22
What are the steps to access the Service Setup Wizard during the first setup of the Expressway server to license the server?
A. rom the GUI of the Expressway server, go to Maintenance> Option keys> First Setup Wizard
B. rom the GUI of the Expressway server, go to Status> Overview> Run service setup
C. actory reset the Expressway server to pass from Expressway-C to Expressway-E
D. actory reset the Expressway server to pass from Smart Licensing to PAK-based licensing
View answer
Correct Answer: B
Question #23
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. NAT ALG introduces jitter in the voice path
D. Source addresses cannot provide the destination addresses that remote endpoints should use for return packets
View answer
Correct Answer: B
Question #24
Which dial plan settings can be used to set up different regulations according to the protocol (SIP or H.323) or the source of the query?
A. presearch transforms
B. search rules
C. call policy
D. policy services
View answer
Correct Answer: B
Question #25
Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
A. Off
B. Auto
C. Force Encrypted
D. Best Effort
E. Reveal Answer
View answer
Correct Answer: B
Question #26
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
A. STUN
B. RTP
C. SNMP
D. TURN
View answer
Correct Answer: A
Question #27
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
A. Acall routing
B. Btraversal subzone
C. Ccall policy
D. Dsearch rule
View answer
Correct Answer: D
Question #28
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
A. call routing
B. traversal subzone
C. call policy
D. search rule
View answer
Correct Answer: A
Question #29
Which step is required when configuring Cisco Webex Hybrid Message Service?
A. egister Expressway-C Connector Hosts to the Cisco Webex Cloud
B. egister Expressway-C to Cisco Unified Communications Manager
C. dd Expressway-C and Cisco United CM to the Cisco Webex Cloud
D. dd Cisco Unity Connection to Expressway-E
View answer
Correct Answer: A
Question #30
An organization with a domain name of example.com.Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)
A. _sips
B. _sips
C. _h323ls
D. _h323ls
E. _collab-edge
View answer
Correct Answer: AC
Question #31
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
A. STUN
B. RTP
C. SNMP
D. TURN
View answer
Correct Answer: A
Question #32
Which complication does a NAT introduce in SDP for a SIP call?
A. Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU
B. When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones
C. The IP address specified in the connection data field may be an unrouteable internal address
D. The encryption keys advertised in the SDP are only valid for clients not behind a NAT
View answer
Correct Answer: C
Question #33
Which service is available in a cloud-based deployment using Cisco Webex Messenger?
A. resence
B. hone services
C. oicemail
D. all forward services
View answer
Correct Answer: A
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
View answer
Correct Answer: A
Question #35
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
A. call routing
B. traversal subzone
C. call policy
D. search rule
View answer
Correct Answer: A
Question #36
Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
A. Off
B. Best Effort
C. Auto
D. Force Encrypted
View answer
Correct Answer: A
Question #37
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. The video call is using encryption, which is not supported by ICE with CUCM 12
B. ICE cannot reduce the packet loss on the link
C. A STUN cannot punch holes in the firewall
D. The video call is using 4K resolution, which is not supported by ICE with CUCM 12
View answer
Correct Answer: A
Question #38
Which two considerations must be made when using Expressway media traversal? (Choose two.)
A. It is possible to NAT both Expressway-E interfaces
B. The Unified Communications traversal zone should be used for MRA
C. The Expressway-E must be put in a firewall DMZ segment
D. Expressway Control is the traversal server installed in the DMZ
E. Cisco UCM zone should be either traversal server or client
View answer
Correct Answer: BC
Question #39
Which two types of information does Cisco Expressway back up? (Choose two.)
A. call records
B. log files
C. IP addresses
D. current call states
E. security certificates
View answer
Correct Answer: DE
Question #40
What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?
A. 1024
B. 2048
C. 4096
D. 8192
View answer
Correct Answer: C
Question #41
Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints. How does the Expressway-C and Expressway-E communicate?
A. Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint
B. Internal endpoints are registered to Expressway-E in the DMZ
C. Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint
D. Internal endpoints are registered to Expressway-C in the DMZ
View answer
Correct Answer: A

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