Dumps for Free Cisco 300-820 Practice Exam Questions [Jan 14, 2024]
300-820 Dumps PDF And Certification Training
NEW QUESTION # 61
Refer to the exhibit. Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
- A. XMPP: TCP 7400
- B. HTTPS: TCP 8443
- C. SIP: TCP 7001
- D. SIP TCP 5061
- E. Media: UDP 36012 to 59999
Answer: A,C
Explanation:
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-
5/Cisco-Expressway-IP-Port-Usage-for-The internal firewall must allow the following outbound connections from the Expressway-C to the Expressway-E:
SIP: TCP 7001
Traversal media: UDP 2776 to 2777 (or 36000 to 36011 for large
VM/appliance)
XMPP: TCP 7400
HTTPS (tunneled over SSH between C and E): TCP 2222
NEW QUESTION # 62
Refer to the exhibit.
Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
- A. XMPP: TCP 7400
- B. HTTPS: TCP 8443
- C. SIP: TCP 7001
- D. SIP TCP 5061
- E. Media: UDP 36012 to 59999
Answer: A,C
NEW QUESTION # 63
Which two statements about Expressway-C / Expressway-E Firewall Traversal are correct?
(Choose two.)
- A. SIP or H.323 "fixup" ALG or awareness functionality must be enabled on the NAT firewalls.
- B. SIP or H.323 "fixup" ALG or awareness functionality must be disabled on the NAT firewalls.
- C. SIP or H.323 "fixup" ALG or awareness functionality must be enabled on the NAT firewall between the DMZ and the Internet only.
- D. The communications between Expressway-C and Expressway-E are always initiated from the Expressway-C to the Expressway-E.
- E. The communications between Expressway-C and Expressway-E are always initiated from the Expressway-E to the Expressway-C.
Answer: B,D
NEW QUESTION # 64
When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verity subject name must be configured on the Expressway-E UC traversal zone?
- A. Cisco Unified Communications Manager Publisher FQDN
- B. Expressway-C Cluster Name
- C. Webex CUSP Cluster Name
- D. Expressway-E Cluster Name
Answer: B
Explanation:
On Expressway E, Enter the name to look for in the traversal client's certificate (must be in either the Subject Common Name or the Subject Alternative Name attributes). If there is a cluster of traversal clients, specify the cluster name here and ensure that it is included in each client's certificate.
Traversal Client is EXP-C
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-
8/Mobile-Remote-Access-via-Expressway-Deployment-Guide-X8-8.pdf
NEW QUESTION # 65
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. incorrect login credentials
- B. service discovery issues
- C. down Cisco Unified Communications Manager server
- D. XMPP bind failures
Answer: D
Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-
7/exwy_b_mra-deployment/exwy_m_mra-troubleshooting.pdf
NEW QUESTION # 66
Within which cache timeline do the Webex App endpoints perform a STUN test to calculate round-trip delay time to available media node clusters?
- A. 2 hours
- B. 1 hour
- C. 6 hours
- D. 4 hours
Answer: C
NEW QUESTION # 67
Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)
- A. unsolicited notify
- B. RFC 2833
- C. KPML
- D. H.245 user input indication
- E. passthrough
Answer: B,D
NEW QUESTION # 68
Refer to the exhibit. Mobile Cisco Jabber cannot register with on-premises Cisco Unified Communications Manager using Mobile and Remote Access. Some logs were captured on Expressway Edge.
Which action corrects this problem?
- A. Ensure that the peer address does not match the Common Name on certificate.
- B. Ensure that the SIP domains are added on Expressway Core.
- C. Ensure that the credential has been entered correctly.
- D. Ensure that the _cisco-uds SRV record has been configured.
Answer: C
Explanation:
https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2018/pdf/BRKCOL-2021.pdf
NEW QUESTION # 69
Which step is taken when configuring a Cisco Expressway solution?
- A. Disable H.323 mode on the Expressway-E.
- B. Enable static NAT on the Expressway-E only.
- C. Configure the Expressway-E by using a non-traversal server zone.
- D. Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.
Answer: B
Explanation:
Explanation
NEW QUESTION # 70
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. _h323ls._udp.example com
- B. _collab-edge._tls.example.com
- C. _sips._udp.example.com
- D. _sips._tcp.example.com
- E. _h323ls._tcp.example.com
Answer: A,D
Explanation:
The format of DNS SRV queries for sip (RFC 3263) and H.323 used by Expressway are:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
_sip._udp.<fully.qualified.domain> - not recommended for video calls, only use for audio-only calls
_h323ls._udp.<fully.qualified.domain> - for UDP location (RAS) signaling, such as LRQ
_h323cs._tcp.<fully.qualified.domain> - for H.323 call signaling
The format of DNS SRV queries for sip (RFC 3263) and H.323 typically used by an endpoint are:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
_sip._udp.<fully.qualified.domain> - not recommended for video calls, only use for audio-only calls
_h323ls._udp.<fully.qualified.domain> - for UDP location (RAS) signaling, such as LRQ
_h323cs._tcp.<fully.qualified.domain> - for H.323 call signaling
_h323rs._udp.<fully.qualified.domain> - for H.323 registrations
NEW QUESTION # 71
Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?
- A. Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.
- B. Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.
- C. Cisco Unified CM is always used for meeting capabilities.
- D. Cisco Webex Meeting Center is always used for meeting capabilities.
Answer: A
NEW QUESTION # 72
Refer to the exhibit.
Which two numbers match the regular expression? (Choose two.)
- A. d20d16d20d22
- B. 0
- C. d209d165d200d224
- D. 1
- E. 2
Answer: B,E
NEW QUESTION # 73
What allows endpoints behind a NAT to discover the paths through which they will pass media?
- A. ICE
- B. SNMP
- C. RTP
- D. TLS
Answer: A
Explanation:
https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html
NEW QUESTION # 74
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 Lookup Service working across all of your IM and Presence clusters.
- B. AXL service should be activated only on the publisher of each IM and Presence cluster.
- C. You must have the Intercluster Sync Agent working across your IM and Presence clusters.
- D. Your IM and Presence Service clusters must have Multiple Device Messaging disabled.
Answer: C
Explanation:
The Cisco Sync Agent must be running on the database publisher node of each intercluster peer on the local and remote IM and Presence database publisher nodes.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/configAdminGuide/11_
5_1/cup0_b_config-and-admin-guide-1151su5/cup0_b_imp-system-configuration-
1151su5_chapter_01100.pdf
NEW QUESTION # 75
Which service is available in a cloud-based deployment using Cisco Webex Messenger?
- A. Phone services
- B. Call forward services
- C. Voicemail
- D. Presence
Answer: D
Explanation:
The following services are available in a cloud-based deployment using Webex Messenger:
- Contact Source
- Presence
- Instant Messaging
- Conferencing
NEW QUESTION # 76
What is one of the user-related prerequisites for Jabber Team Messaging Mode Installation?
- A. Create user accounts in Cisco Unified IM and Presence.
- B. Create user accounts in Cisco Unified CM and Cisco Webex Control Hub.
- C. Create user accounts in Cisco Webex Control Hub only.
- D. Create user accounts in Cisco Unified Communications Manager only.
Answer: B
NEW QUESTION # 77
Which statement about scheduling Expressway backups is true?
- A. It is allowed from the application CLI of the Expressway only.
- B. It is allowed from the application CLI and GUI of the Expressway.
- C. It is allowed from the application GUI of the Expressway only.
- D. It is not supported on the application.
Answer: D
Explanation:
Scheduling backups is not supported in the Expressway code.
NEW QUESTION # 78
Refer to the exhibit.
What is the result of a transformation applied to alias 88514?
- A. 88513@ccnpcollab com
- B. [email protected]
- C. [email protected]
- D. [email protected]
Answer: C
NEW QUESTION # 79
Refer to the exhibit.
Mobile Cisco Jabber cannot register with on-premises Cisco Unified Communications Manager using Mobile and Remote Access. Some logs were captured on Expressway Edge.
Which action corrects this problem?
- A. Ensure that the peer address does not match the Common Name on certificate.
- B. Ensure that the SIP domains are added on Expressway Core.
- C. Ensure that the credential has been entered correctly.
- D. Ensure that the _cisco-uds SRV record has been configured.
Answer: C
NEW QUESTION # 80
An administrator must configure the DNS SRV records for Mobile and Remote Access for a company with the domain example.com, the Expressway-E FQDN is ExpE.example.com, and the Expressway-C FQDN is Exp-C.example.com. What must the administrator configure to allow external clients to discover the Expressway-E server?
- A. SRV record _collab-edge._tls.example.com that resolves ta ExpE.example.com on port 5061
- B. SRV record _cisco-uds._tcp.example.com that resolves to ExpC.example.com on port 8443
- C. SRV record _collab-edge._tls.example.com that resolves to ExpE.example.com on port 8443
- D. SRV record _cisco-uds._tcp.example.com that resolves to ExpE.example.com on port 5061
Answer: C
Explanation:
To allow external clients to discover the Expressway-E server, the administrator must configure the SRV record _collab-edge._tls.example.com that resolves to ExpE.example.com on port 8443.
This SRV record is used for Mobile and Remote Access to allow external clients to connect securely to the Expressway-E server. The _collab-edge._tls prefix is used to identify the service as a "collaboration edge" service and the .example.com suffix is the domain name for the organization. Port 8443 is the default port used for secure HTTPS connections to the Expressway-E server.
NEW QUESTION # 81
Refer to the exhibit. An Expressway-C and Expressway-E are configured for B2B calling and the Expressway-E zone is set to TLS Verify Currently, calls do not reach the Expressway-C. The Traversal Client zone on the Expressway-C for B2B reports the information in the exhibit for the Peer 1 address.
Which action resolves this error?
- A. Add a server certificate to the Expressway-C that is signed by a certificate authority.
- B. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
- C. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
- D. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
Answer: A
Explanation:
You can upload the server certificate with the full chain on it. The issue here seems to be the temporary cert.
NEW QUESTION # 82
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 remains in the same zone.
- C. 13358 is replaced by 135, and then is sent to the traversal zone.
- D. 13358 is replaced by 135, and then is sent to the local zone.
Answer: C
NEW QUESTION # 83
Refer to the exhibit.
What is the result of a transformation applied to alias 88514?
- A. 88513@ccnpcollab com
- B. [email protected]
- C. [email protected]
- D. [email protected]
Answer: B
NEW QUESTION # 84
Refer to the exhibit.
Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
- A. XMPP: TCP 7400
- B. HTTPS: TCP 8443
- C. SIP: TCP 7001
- D. SIP TCP 5061
- E. Media: UDP 36012 to 59999
Answer: A,C
NEW QUESTION # 85
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 # 86
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Cisco 300-820 certification exam covers a wide range of topics related to collaboration cloud and edge solutions, including call control protocols, endpoint registration, Cisco Expressway configurations, Cisco Webex Hybrid Services, and Cisco Cloud Services. 300-820 exam is designed to test the candidate's ability to implement and troubleshoot these solutions in real-world scenarios.
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